Abstract

In this contribution, we propose to combine both narrow-band green (β-sialon:Eu2+) and red (K2SiF6:Mn4+) phosphors with a blue InGaN chip to achieve white light-emitting diodes (wLEDs) with a large color gamut and a high efficiency for use as the liquid crystal display (LCD) backlighting. β-sialon:Eu2+, prepared by a gas-pressure sinteing technique, has a peak emission at 535 nm, a full width at half maximum (FWHM) of 54 nm, and an external quantum efficiency of 54.0% under the 450 nm excitation. K2SiF6:Mn4+ was synthesized by a twe-step co-precipitation methods, and exhibits a sharp line emission spectrum with the most intensified peak at 631 nm, a FWHM of ~3 nm, and an external quantum efficiency of 54.5%. The prepared three-band wLEDs have a high color temperature of 11,184 - 13,769 K (i.e., 7,828 - 8,611 K for LCD displays), and a luminous efficacy of 91 – 96 lm/W, measured under an applied current of 120 mA. The color gamut defined in the CIE 1931 and CIE 1976 color spaces are 85.5 - 85.9% and 94.3 - 96.2% of the NTSC stanadard, respectively. These optical properties are better than those phosphor-cpnverted wLED backlights using wide-band green or red phosphoprs, suggesting that the two narrow-band phosphors investigated are the most suitable luminescent materials for achieving more bright and vivid displays.

© 2015 Optical Society of America

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References

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    [Crossref]
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    [Crossref]
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    [Crossref]
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    [PubMed]
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    [Crossref]
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    [Crossref]
  30. J. L. Sommerdijk, J. M. P. J. Verstegen, and A. Bril, “Luminescence of MeFX:Eu2+ (Me = Sr, Ba; X = Cl, Br),” J. Lumin. 8(6), 502–506 (1974).
    [Crossref]
  31. R. F. Sosa, E. R. Alvarez, M. A. Camacho, A. F. Munoz, and J. O. Rubio, “Time-resolved spectroscopy of the Eu2+ luminescence in KCl:Ba2+,Eu2+ KCl:Sr2+,Eu2+ and KBr:Sr2+,Eu2+,” J. Phys. Condens. Matter 7(32), 6561–6568 (1995).
    [Crossref]
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    [Crossref] [PubMed]
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    [Crossref]
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  35. K. Takahashi, R.-J. Xie, and N. Hirosaki, “Toward higher color purity and narrower emission band β-sialon:Eu2+ by reducing the oxygen concentration,” Electrochem. Solid-State Lett. 14(11), E38–E40 (2011).
    [Crossref]

2015 (3)

J. H. Oh, H. Kang, M. Ko, and Y. R. Do, “Analysis of wide color gamut of green/red bilayered freestanding phosphor film-capped white LEDs for LCD backlight,” Opt. Express 23(15), A791–A804 (2015).
[Crossref] [PubMed]

J. H. Oh, H. Kang, Y. J. Eo, H. K. Park, and Y. R. Do, “Synthesis of narrow-band red-emitting K2SiF6:Mn4+ phosphors for a deep red monochromatic LED and ultrahigh color quality warm-white LEDs,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(3), 607–615 (2015).
[Crossref]

M. Kim, W. B. Park, B. Bang, C. H. Kim, and K.-S. Sohn, “Radiative and non-radiative decay rate of K2SiF6:Mn4+ phosphors,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(21), 5484–5489 (2015).
[Crossref]

2014 (4)

Y. Ito, T. Hori, T. Kusunoki, H. Nomura, and H. Kondo, “A phosphor sheet and a backlight system providing wider color gamut for LCDs,” J. Symp. Dig. 22(8), 419–428 (2014).

S.-H. Lee, K.-H. Lee, J.-H. Jo, B. Park, Y. Kwon, H. S. Jang, and H. Yang, “Remote-type, high-color gamut white light-emitting diode based on InP quantum dot color converters,” Opt. Mater. Express 4(7), 1297–1302 (2014).
[Crossref]

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

2013 (5)

C. X. Liao, R. P. Cao, Z. J. Ma, Y. Li, G. P. Dong, K. N. Sharafudeen, and J. R. Qiu, “Synthesis of K2SiF6:Mn4+ phosphor from SiO2 powders via redox reaction in KF/KMnO4 solution and their application in warm-white LEDs,” J. Am. Ceram. Soc. 96(11), 3552–3556 (2013).
[Crossref]

Y. Shirasaki, G. J. Supran, M. G. Bawendi, and V. Bulovic, “Emergence of colloidal quantum-dot light-emitting technologies,” Nat. Photonics 7(1), 13–23 (2013).
[Crossref]

S. Coe-Sullivan, W. Liu, P. Allen, and J. S. Steckel, “Quantum dots for LED downconversion in display applications,” ECS J. Solid State Sci. Technol. 2(2), R3026–R3030 (2013).
[Crossref]

Z. Luo, Y. Chen, and S.-T. Wu, “Wide color gamut LCD with a quantum dot backlight,” Opt. Express 21(22), 26269–26284 (2013).
[Crossref] [PubMed]

S. S. Wang, W. T. Chen, Y. Li, J. Wang, H. S. Sheu, and R. S. Liu, “Neighboring-cation substitution tuning of photoluminescence by remote-controlled activator in phosphor lattice,” J. Am. Chem. Soc. 135(34), 12504–12507 (2013).
[Crossref] [PubMed]

2012 (1)

Y. Fukuda, N. Matsuda, A. Okada, and I. Mitsuishi, “White light-emitting diodes for wide-color-gamut backlight using green-emitting Sr-Sialon phosphor,” Jpn. J. Appl. Phys. 51(12), 122101 (2012).
[Crossref]

2011 (1)

K. Takahashi, R.-J. Xie, and N. Hirosaki, “Toward higher color purity and narrower emission band β-sialon:Eu2+ by reducing the oxygen concentration,” Electrochem. Solid-State Lett. 14(11), E38–E40 (2011).
[Crossref]

2010 (2)

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

E. Jang, S. Jun, H. Jang, J. Lim, B. Kim, and Y. Kim, “White-light-emitting diodes with quantum dot color converters for display backlights,” Adv. Mater. 22(28), 3076–3080 (2010).
[Crossref] [PubMed]

2009 (4)

R.-J. Xie, N. Hirosaki, and T. Takeda, “Wide color gamut backlight for liquid crystal displays using three-band phosphor-converted white light-emitting diodes,” Appl. Phys. Express 2, 022401 (2009).
[Crossref]

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and Properties of Green-Emitting β-SiAlON:Eu2+ Powder Phosphors for White Light-Emitting Diodes,” Appl. Phys. Lett. 86, 211905 (2009).
[Crossref]

T. Takahashi and S. Adachi, “Synthesis of K2SiF6:Mn4+ red phosphor from Silica Glasses by wet chemical etching in HF/KMnO4 sollution,” Electrochem. Solid-State Lett. 12(8), J69–J71 (2009).
[Crossref]

Y. Fukuda, K. Ishida, I. Mitsuishi, and S. Nunoue, “Luminescence properties of Eu2+-doped green-emitting Sr-Sialon phosphor and its application to white light-emitting diodes,” Appl. Phys. Express 2(1), 012401 (2009).
[Crossref]

2008 (4)

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Crystal and electronic structures, luminescence properties of Eu2+-doped Si6-zAlzOzN8-z and MySi6-zAlz-yOz+yN8-z-y (M = 2Li, Mg, Ca, Sr, Ba,” J. Solid State Chem. 181(12), 3200–3210 (2008).
[Crossref]

R.-J. Xie, N. Hirosaki, X.-J. Liu, T. Takeda, and H.-L. Li, “Crystal structure and photoluminescence of Mn2+-Mg2+ codoped gamma aluminum oxynitride (γ-AlON): A promising green phosphor for white light-emitting diodes,” Appl. Phys. Lett. 92(20), 201905 (2008).
[Crossref]

S. Adachi and T. Takahashi, “Direct Synthesis and properties of K2SiF6:Mn4+ phosphor by wet chemical etching of Si wafer,” J. Appl. Phys. 104(2), 023512 (2008).
[Crossref]

R.-J. Xie, N. Hirosaki, H. L. Li, Y. Q. Li, and M. Mitomo, “Synthesis and photoluminescence properties of β-sialon:Eu2+ (Si6-zAlzOzN8-z:Eu2+) – A promising green oxynitride phosphor for white light-emitting diodes,” J. Electrochem. Soc. 154, J314–J319 (2008).
[Crossref]

2006 (1)

K. Uheda, N. Hirosaki, Y. Yamamoto, A. Naito, T. Nakajima, and H. Yamamoto, “Luminescence properties of a red phosphor, CaAlSiN3:Eu2+, for white light-emitting diodes,” Electrochem. Solid-State Lett. 9(4), H22–H25 (2006).
[Crossref]

1999 (1)

K. Ohkubo and T. Shigeta, “Absolute fluorescent quantum efficiency of NBS phosphor standard samples,” J. Illum. Eng. Inst. Japan 83, 87–93 (1999).

1995 (1)

R. F. Sosa, E. R. Alvarez, M. A. Camacho, A. F. Munoz, and J. O. Rubio, “Time-resolved spectroscopy of the Eu2+ luminescence in KCl:Ba2+,Eu2+ KCl:Sr2+,Eu2+ and KBr:Sr2+,Eu2+,” J. Phys. Condens. Matter 7(32), 6561–6568 (1995).
[Crossref]

1988 (1)

S. Bhushan and M. V. Chukichev, “Temperature dependent studies of cathodoluminescence of green band of ZnO crystals,” J. Mater. Sci. Lett. 7(4), 319–321 (1988).
[Crossref]

1984 (1)

J. H. Loehlin, “Redetermination of the structure of potassium hexafluorosilicate, K2SiF6,” Acta Crystallogr. C 40(3), 570 (1984).
[Crossref]

1974 (1)

J. L. Sommerdijk, J. M. P. J. Verstegen, and A. Bril, “Luminescence of MeFX:Eu2+ (Me = Sr, Ba; X = Cl, Br),” J. Lumin. 8(6), 502–506 (1974).
[Crossref]

1973 (1)

A. G. Paulusz, “Efficient Mn (IV) emission in fluorine coordination,” J. Electrochem. Soc. 120(7), 942–947 (1973).
[Crossref]

1972 (1)

K. H. Jack and W. I. Wilson, “Ceramics based on the Si-Al-O-N and related systems,” Nat. Phys. Sci (Lond.) 238(80), 28–29 (1972).
[Crossref]

Adachi, S.

T. Takahashi and S. Adachi, “Synthesis of K2SiF6:Mn4+ red phosphor from Silica Glasses by wet chemical etching in HF/KMnO4 sollution,” Electrochem. Solid-State Lett. 12(8), J69–J71 (2009).
[Crossref]

S. Adachi and T. Takahashi, “Direct Synthesis and properties of K2SiF6:Mn4+ phosphor by wet chemical etching of Si wafer,” J. Appl. Phys. 104(2), 023512 (2008).
[Crossref]

Aesram, D.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Allen, P.

S. Coe-Sullivan, W. Liu, P. Allen, and J. S. Steckel, “Quantum dots for LED downconversion in display applications,” ECS J. Solid State Sci. Technol. 2(2), R3026–R3030 (2013).
[Crossref]

Alvarez, E. R.

R. F. Sosa, E. R. Alvarez, M. A. Camacho, A. F. Munoz, and J. O. Rubio, “Time-resolved spectroscopy of the Eu2+ luminescence in KCl:Ba2+,Eu2+ KCl:Sr2+,Eu2+ and KBr:Sr2+,Eu2+,” J. Phys. Condens. Matter 7(32), 6561–6568 (1995).
[Crossref]

Bang, B.

M. Kim, W. B. Park, B. Bang, C. H. Kim, and K.-S. Sohn, “Radiative and non-radiative decay rate of K2SiF6:Mn4+ phosphors,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(21), 5484–5489 (2015).
[Crossref]

Bawendi, M. G.

Y. Shirasaki, G. J. Supran, M. G. Bawendi, and V. Bulovic, “Emergence of colloidal quantum-dot light-emitting technologies,” Nat. Photonics 7(1), 13–23 (2013).
[Crossref]

Bhushan, S.

S. Bhushan and M. V. Chukichev, “Temperature dependent studies of cathodoluminescence of green band of ZnO crystals,” J. Mater. Sci. Lett. 7(4), 319–321 (1988).
[Crossref]

Bril, A.

J. L. Sommerdijk, J. M. P. J. Verstegen, and A. Bril, “Luminescence of MeFX:Eu2+ (Me = Sr, Ba; X = Cl, Br),” J. Lumin. 8(6), 502–506 (1974).
[Crossref]

Bulovic, V.

Y. Shirasaki, G. J. Supran, M. G. Bawendi, and V. Bulovic, “Emergence of colloidal quantum-dot light-emitting technologies,” Nat. Photonics 7(1), 13–23 (2013).
[Crossref]

Camacho, M. A.

R. F. Sosa, E. R. Alvarez, M. A. Camacho, A. F. Munoz, and J. O. Rubio, “Time-resolved spectroscopy of the Eu2+ luminescence in KCl:Ba2+,Eu2+ KCl:Sr2+,Eu2+ and KBr:Sr2+,Eu2+,” J. Phys. Condens. Matter 7(32), 6561–6568 (1995).
[Crossref]

Cao, R. P.

C. X. Liao, R. P. Cao, Z. J. Ma, Y. Li, G. P. Dong, K. N. Sharafudeen, and J. R. Qiu, “Synthesis of K2SiF6:Mn4+ phosphor from SiO2 powders via redox reaction in KF/KMnO4 solution and their application in warm-white LEDs,” J. Am. Ceram. Soc. 96(11), 3552–3556 (2013).
[Crossref]

Cao, Y.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

Chen, W. T.

S. S. Wang, W. T. Chen, Y. Li, J. Wang, H. S. Sheu, and R. S. Liu, “Neighboring-cation substitution tuning of photoluminescence by remote-controlled activator in phosphor lattice,” J. Am. Chem. Soc. 135(34), 12504–12507 (2013).
[Crossref] [PubMed]

Chen, X.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

Chen, Y.

Chukichev, M. V.

S. Bhushan and M. V. Chukichev, “Temperature dependent studies of cathodoluminescence of green band of ZnO crystals,” J. Mater. Sci. Lett. 7(4), 319–321 (1988).
[Crossref]

Coe-Sullivan, S.

S. Coe-Sullivan, W. Liu, P. Allen, and J. S. Steckel, “Quantum dots for LED downconversion in display applications,” ECS J. Solid State Sci. Technol. 2(2), R3026–R3030 (2013).
[Crossref]

Deshpande, A.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Do, Y. R.

J. H. Oh, H. Kang, Y. J. Eo, H. K. Park, and Y. R. Do, “Synthesis of narrow-band red-emitting K2SiF6:Mn4+ phosphors for a deep red monochromatic LED and ultrahigh color quality warm-white LEDs,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(3), 607–615 (2015).
[Crossref]

J. H. Oh, H. Kang, M. Ko, and Y. R. Do, “Analysis of wide color gamut of green/red bilayered freestanding phosphor film-capped white LEDs for LCD backlight,” Opt. Express 23(15), A791–A804 (2015).
[Crossref] [PubMed]

Dong, G. P.

C. X. Liao, R. P. Cao, Z. J. Ma, Y. Li, G. P. Dong, K. N. Sharafudeen, and J. R. Qiu, “Synthesis of K2SiF6:Mn4+ phosphor from SiO2 powders via redox reaction in KF/KMnO4 solution and their application in warm-white LEDs,” J. Am. Ceram. Soc. 96(11), 3552–3556 (2013).
[Crossref]

Eo, Y. J.

J. H. Oh, H. Kang, Y. J. Eo, H. K. Park, and Y. R. Do, “Synthesis of narrow-band red-emitting K2SiF6:Mn4+ phosphors for a deep red monochromatic LED and ultrahigh color quality warm-white LEDs,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(3), 607–615 (2015).
[Crossref]

Fukuda, Y.

Y. Fukuda, N. Matsuda, A. Okada, and I. Mitsuishi, “White light-emitting diodes for wide-color-gamut backlight using green-emitting Sr-Sialon phosphor,” Jpn. J. Appl. Phys. 51(12), 122101 (2012).
[Crossref]

Y. Fukuda, K. Ishida, I. Mitsuishi, and S. Nunoue, “Luminescence properties of Eu2+-doped green-emitting Sr-Sialon phosphor and its application to white light-emitting diodes,” Appl. Phys. Express 2(1), 012401 (2009).
[Crossref]

Grigorov, L. S.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Happek, U.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Hecht, C.

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

Henderson, C. S.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Henß, A. K.

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
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Her, J.-H.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
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K. Takahashi, R.-J. Xie, and N. Hirosaki, “Toward higher color purity and narrower emission band β-sialon:Eu2+ by reducing the oxygen concentration,” Electrochem. Solid-State Lett. 14(11), E38–E40 (2011).
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R.-J. Xie, N. Hirosaki, and T. Takeda, “Wide color gamut backlight for liquid crystal displays using three-band phosphor-converted white light-emitting diodes,” Appl. Phys. Express 2, 022401 (2009).
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N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and Properties of Green-Emitting β-SiAlON:Eu2+ Powder Phosphors for White Light-Emitting Diodes,” Appl. Phys. Lett. 86, 211905 (2009).
[Crossref]

R.-J. Xie, N. Hirosaki, H. L. Li, Y. Q. Li, and M. Mitomo, “Synthesis and photoluminescence properties of β-sialon:Eu2+ (Si6-zAlzOzN8-z:Eu2+) – A promising green oxynitride phosphor for white light-emitting diodes,” J. Electrochem. Soc. 154, J314–J319 (2008).
[Crossref]

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Crystal and electronic structures, luminescence properties of Eu2+-doped Si6-zAlzOzN8-z and MySi6-zAlz-yOz+yN8-z-y (M = 2Li, Mg, Ca, Sr, Ba,” J. Solid State Chem. 181(12), 3200–3210 (2008).
[Crossref]

R.-J. Xie, N. Hirosaki, X.-J. Liu, T. Takeda, and H.-L. Li, “Crystal structure and photoluminescence of Mn2+-Mg2+ codoped gamma aluminum oxynitride (γ-AlON): A promising green phosphor for white light-emitting diodes,” Appl. Phys. Lett. 92(20), 201905 (2008).
[Crossref]

K. Uheda, N. Hirosaki, Y. Yamamoto, A. Naito, T. Nakajima, and H. Yamamoto, “Luminescence properties of a red phosphor, CaAlSiN3:Eu2+, for white light-emitting diodes,” Electrochem. Solid-State Lett. 9(4), H22–H25 (2006).
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Hori, T.

Y. Ito, T. Hori, T. Kusunoki, H. Nomura, and H. Kondo, “A phosphor sheet and a backlight system providing wider color gamut for LCDs,” J. Symp. Dig. 22(8), 419–428 (2014).

Ishida, K.

Y. Fukuda, K. Ishida, I. Mitsuishi, and S. Nunoue, “Luminescence properties of Eu2+-doped green-emitting Sr-Sialon phosphor and its application to white light-emitting diodes,” Appl. Phys. Express 2(1), 012401 (2009).
[Crossref]

Ito, Y.

Y. Ito, T. Hori, T. Kusunoki, H. Nomura, and H. Kondo, “A phosphor sheet and a backlight system providing wider color gamut for LCDs,” J. Symp. Dig. 22(8), 419–428 (2014).

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K. H. Jack and W. I. Wilson, “Ceramics based on the Si-Al-O-N and related systems,” Nat. Phys. Sci (Lond.) 238(80), 28–29 (1972).
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Jang, E.

E. Jang, S. Jun, H. Jang, J. Lim, B. Kim, and Y. Kim, “White-light-emitting diodes with quantum dot color converters for display backlights,” Adv. Mater. 22(28), 3076–3080 (2010).
[Crossref] [PubMed]

Jang, H.

E. Jang, S. Jun, H. Jang, J. Lim, B. Kim, and Y. Kim, “White-light-emitting diodes with quantum dot color converters for display backlights,” Adv. Mater. 22(28), 3076–3080 (2010).
[Crossref] [PubMed]

Jang, H. S.

Jo, J.-H.

Jun, S.

E. Jang, S. Jun, H. Jang, J. Lim, B. Kim, and Y. Kim, “White-light-emitting diodes with quantum dot color converters for display backlights,” Adv. Mater. 22(28), 3076–3080 (2010).
[Crossref] [PubMed]

Kang, H.

J. H. Oh, H. Kang, Y. J. Eo, H. K. Park, and Y. R. Do, “Synthesis of narrow-band red-emitting K2SiF6:Mn4+ phosphors for a deep red monochromatic LED and ultrahigh color quality warm-white LEDs,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(3), 607–615 (2015).
[Crossref]

J. H. Oh, H. Kang, M. Ko, and Y. R. Do, “Analysis of wide color gamut of green/red bilayered freestanding phosphor film-capped white LEDs for LCD backlight,” Opt. Express 23(15), A791–A804 (2015).
[Crossref] [PubMed]

Karkada, N.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Kim, B.

E. Jang, S. Jun, H. Jang, J. Lim, B. Kim, and Y. Kim, “White-light-emitting diodes with quantum dot color converters for display backlights,” Adv. Mater. 22(28), 3076–3080 (2010).
[Crossref] [PubMed]

Kim, C. H.

M. Kim, W. B. Park, B. Bang, C. H. Kim, and K.-S. Sohn, “Radiative and non-radiative decay rate of K2SiF6:Mn4+ phosphors,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(21), 5484–5489 (2015).
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Kim, M.

M. Kim, W. B. Park, B. Bang, C. H. Kim, and K.-S. Sohn, “Radiative and non-radiative decay rate of K2SiF6:Mn4+ phosphors,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(21), 5484–5489 (2015).
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Kim, Y.

E. Jang, S. Jun, H. Jang, J. Lim, B. Kim, and Y. Kim, “White-light-emitting diodes with quantum dot color converters for display backlights,” Adv. Mater. 22(28), 3076–3080 (2010).
[Crossref] [PubMed]

Kimoto, K.

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and Properties of Green-Emitting β-SiAlON:Eu2+ Powder Phosphors for White Light-Emitting Diodes,” Appl. Phys. Lett. 86, 211905 (2009).
[Crossref]

Kishore, M. S.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Ko, M.

Kolodin, B.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Kondo, H.

Y. Ito, T. Hori, T. Kusunoki, H. Nomura, and H. Kondo, “A phosphor sheet and a backlight system providing wider color gamut for LCDs,” J. Symp. Dig. 22(8), 419–428 (2014).

Kong, J.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

Kumar, N. P.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Kusunoki, T.

Y. Ito, T. Hori, T. Kusunoki, H. Nomura, and H. Kondo, “A phosphor sheet and a backlight system providing wider color gamut for LCDs,” J. Symp. Dig. 22(8), 419–428 (2014).

Kwon, Y.

Lee, K.-H.

Lee, S.-H.

Li, H. L.

R.-J. Xie, N. Hirosaki, H. L. Li, Y. Q. Li, and M. Mitomo, “Synthesis and photoluminescence properties of β-sialon:Eu2+ (Si6-zAlzOzN8-z:Eu2+) – A promising green oxynitride phosphor for white light-emitting diodes,” J. Electrochem. Soc. 154, J314–J319 (2008).
[Crossref]

Li, H.-L.

R.-J. Xie, N. Hirosaki, X.-J. Liu, T. Takeda, and H.-L. Li, “Crystal structure and photoluminescence of Mn2+-Mg2+ codoped gamma aluminum oxynitride (γ-AlON): A promising green phosphor for white light-emitting diodes,” Appl. Phys. Lett. 92(20), 201905 (2008).
[Crossref]

Li, Y.

C. X. Liao, R. P. Cao, Z. J. Ma, Y. Li, G. P. Dong, K. N. Sharafudeen, and J. R. Qiu, “Synthesis of K2SiF6:Mn4+ phosphor from SiO2 powders via redox reaction in KF/KMnO4 solution and their application in warm-white LEDs,” J. Am. Ceram. Soc. 96(11), 3552–3556 (2013).
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S. S. Wang, W. T. Chen, Y. Li, J. Wang, H. S. Sheu, and R. S. Liu, “Neighboring-cation substitution tuning of photoluminescence by remote-controlled activator in phosphor lattice,” J. Am. Chem. Soc. 135(34), 12504–12507 (2013).
[Crossref] [PubMed]

Li, Y. Q.

R.-J. Xie, N. Hirosaki, H. L. Li, Y. Q. Li, and M. Mitomo, “Synthesis and photoluminescence properties of β-sialon:Eu2+ (Si6-zAlzOzN8-z:Eu2+) – A promising green oxynitride phosphor for white light-emitting diodes,” J. Electrochem. Soc. 154, J314–J319 (2008).
[Crossref]

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Crystal and electronic structures, luminescence properties of Eu2+-doped Si6-zAlzOzN8-z and MySi6-zAlz-yOz+yN8-z-y (M = 2Li, Mg, Ca, Sr, Ba,” J. Solid State Chem. 181(12), 3200–3210 (2008).
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C. X. Liao, R. P. Cao, Z. J. Ma, Y. Li, G. P. Dong, K. N. Sharafudeen, and J. R. Qiu, “Synthesis of K2SiF6:Mn4+ phosphor from SiO2 powders via redox reaction in KF/KMnO4 solution and their application in warm-white LEDs,” J. Am. Ceram. Soc. 96(11), 3552–3556 (2013).
[Crossref]

Lim, J.

E. Jang, S. Jun, H. Jang, J. Lim, B. Kim, and Y. Kim, “White-light-emitting diodes with quantum dot color converters for display backlights,” Adv. Mater. 22(28), 3076–3080 (2010).
[Crossref] [PubMed]

Lin, C. C.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

Liu, R. S.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

S. S. Wang, W. T. Chen, Y. Li, J. Wang, H. S. Sheu, and R. S. Liu, “Neighboring-cation substitution tuning of photoluminescence by remote-controlled activator in phosphor lattice,” J. Am. Chem. Soc. 135(34), 12504–12507 (2013).
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S. Coe-Sullivan, W. Liu, P. Allen, and J. S. Steckel, “Quantum dots for LED downconversion in display applications,” ECS J. Solid State Sci. Technol. 2(2), R3026–R3030 (2013).
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R.-J. Xie, N. Hirosaki, X.-J. Liu, T. Takeda, and H.-L. Li, “Crystal structure and photoluminescence of Mn2+-Mg2+ codoped gamma aluminum oxynitride (γ-AlON): A promising green phosphor for white light-emitting diodes,” Appl. Phys. Lett. 92(20), 201905 (2008).
[Crossref]

Liu, Y.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

Liu, Z.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
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Luo, W.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

Luo, Z.

Ma, E.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

Ma, Z. J.

C. X. Liao, R. P. Cao, Z. J. Ma, Y. Li, G. P. Dong, K. N. Sharafudeen, and J. R. Qiu, “Synthesis of K2SiF6:Mn4+ phosphor from SiO2 powders via redox reaction in KF/KMnO4 solution and their application in warm-white LEDs,” J. Am. Ceram. Soc. 96(11), 3552–3556 (2013).
[Crossref]

Matsuda, N.

Y. Fukuda, N. Matsuda, A. Okada, and I. Mitsuishi, “White light-emitting diodes for wide-color-gamut backlight using green-emitting Sr-Sialon phosphor,” Jpn. J. Appl. Phys. 51(12), 122101 (2012).
[Crossref]

Mitomo, M.

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and Properties of Green-Emitting β-SiAlON:Eu2+ Powder Phosphors for White Light-Emitting Diodes,” Appl. Phys. Lett. 86, 211905 (2009).
[Crossref]

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Crystal and electronic structures, luminescence properties of Eu2+-doped Si6-zAlzOzN8-z and MySi6-zAlz-yOz+yN8-z-y (M = 2Li, Mg, Ca, Sr, Ba,” J. Solid State Chem. 181(12), 3200–3210 (2008).
[Crossref]

R.-J. Xie, N. Hirosaki, H. L. Li, Y. Q. Li, and M. Mitomo, “Synthesis and photoluminescence properties of β-sialon:Eu2+ (Si6-zAlzOzN8-z:Eu2+) – A promising green oxynitride phosphor for white light-emitting diodes,” J. Electrochem. Soc. 154, J314–J319 (2008).
[Crossref]

Mitsuishi, I.

Y. Fukuda, N. Matsuda, A. Okada, and I. Mitsuishi, “White light-emitting diodes for wide-color-gamut backlight using green-emitting Sr-Sialon phosphor,” Jpn. J. Appl. Phys. 51(12), 122101 (2012).
[Crossref]

Y. Fukuda, K. Ishida, I. Mitsuishi, and S. Nunoue, “Luminescence properties of Eu2+-doped green-emitting Sr-Sialon phosphor and its application to white light-emitting diodes,” Appl. Phys. Express 2(1), 012401 (2009).
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R. F. Sosa, E. R. Alvarez, M. A. Camacho, A. F. Munoz, and J. O. Rubio, “Time-resolved spectroscopy of the Eu2+ luminescence in KCl:Ba2+,Eu2+ KCl:Sr2+,Eu2+ and KBr:Sr2+,Eu2+,” J. Phys. Condens. Matter 7(32), 6561–6568 (1995).
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Naito, A.

K. Uheda, N. Hirosaki, Y. Yamamoto, A. Naito, T. Nakajima, and H. Yamamoto, “Luminescence properties of a red phosphor, CaAlSiN3:Eu2+, for white light-emitting diodes,” Electrochem. Solid-State Lett. 9(4), H22–H25 (2006).
[Crossref]

Nakajima, T.

K. Uheda, N. Hirosaki, Y. Yamamoto, A. Naito, T. Nakajima, and H. Yamamoto, “Luminescence properties of a red phosphor, CaAlSiN3:Eu2+, for white light-emitting diodes,” Electrochem. Solid-State Lett. 9(4), H22–H25 (2006).
[Crossref]

Nomura, H.

Y. Ito, T. Hori, T. Kusunoki, H. Nomura, and H. Kondo, “A phosphor sheet and a backlight system providing wider color gamut for LCDs,” J. Symp. Dig. 22(8), 419–428 (2014).

Nunoue, S.

Y. Fukuda, K. Ishida, I. Mitsuishi, and S. Nunoue, “Luminescence properties of Eu2+-doped green-emitting Sr-Sialon phosphor and its application to white light-emitting diodes,” Appl. Phys. Express 2(1), 012401 (2009).
[Crossref]

Oh, J. H.

J. H. Oh, H. Kang, Y. J. Eo, H. K. Park, and Y. R. Do, “Synthesis of narrow-band red-emitting K2SiF6:Mn4+ phosphors for a deep red monochromatic LED and ultrahigh color quality warm-white LEDs,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(3), 607–615 (2015).
[Crossref]

J. H. Oh, H. Kang, M. Ko, and Y. R. Do, “Analysis of wide color gamut of green/red bilayered freestanding phosphor film-capped white LEDs for LCD backlight,” Opt. Express 23(15), A791–A804 (2015).
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Y. Fukuda, N. Matsuda, A. Okada, and I. Mitsuishi, “White light-emitting diodes for wide-color-gamut backlight using green-emitting Sr-Sialon phosphor,” Jpn. J. Appl. Phys. 51(12), 122101 (2012).
[Crossref]

Park, B.

Park, H. K.

J. H. Oh, H. Kang, Y. J. Eo, H. K. Park, and Y. R. Do, “Synthesis of narrow-band red-emitting K2SiF6:Mn4+ phosphors for a deep red monochromatic LED and ultrahigh color quality warm-white LEDs,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(3), 607–615 (2015).
[Crossref]

Park, W. B.

M. Kim, W. B. Park, B. Bang, C. H. Kim, and K.-S. Sohn, “Radiative and non-radiative decay rate of K2SiF6:Mn4+ phosphors,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(21), 5484–5489 (2015).
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P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

Qiu, J. R.

C. X. Liao, R. P. Cao, Z. J. Ma, Y. Li, G. P. Dong, K. N. Sharafudeen, and J. R. Qiu, “Synthesis of K2SiF6:Mn4+ phosphor from SiO2 powders via redox reaction in KF/KMnO4 solution and their application in warm-white LEDs,” J. Am. Ceram. Soc. 96(11), 3552–3556 (2013).
[Crossref]

Radkov, E. V.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Rubio, J. O.

R. F. Sosa, E. R. Alvarez, M. A. Camacho, A. F. Munoz, and J. O. Rubio, “Time-resolved spectroscopy of the Eu2+ luminescence in KCl:Ba2+,Eu2+ KCl:Sr2+,Eu2+ and KBr:Sr2+,Eu2+,” J. Phys. Condens. Matter 7(32), 6561–6568 (1995).
[Crossref]

Scheu, C.

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

Schmidt, P. J.

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

Schnick, W.

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

Sekiguchi, T.

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and Properties of Green-Emitting β-SiAlON:Eu2+ Powder Phosphors for White Light-Emitting Diodes,” Appl. Phys. Lett. 86, 211905 (2009).
[Crossref]

Setlur, A. A.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Sharafudeen, K. N.

C. X. Liao, R. P. Cao, Z. J. Ma, Y. Li, G. P. Dong, K. N. Sharafudeen, and J. R. Qiu, “Synthesis of K2SiF6:Mn4+ phosphor from SiO2 powders via redox reaction in KF/KMnO4 solution and their application in warm-white LEDs,” J. Am. Ceram. Soc. 96(11), 3552–3556 (2013).
[Crossref]

Sheu, H. S.

S. S. Wang, W. T. Chen, Y. Li, J. Wang, H. S. Sheu, and R. S. Liu, “Neighboring-cation substitution tuning of photoluminescence by remote-controlled activator in phosphor lattice,” J. Am. Chem. Soc. 135(34), 12504–12507 (2013).
[Crossref] [PubMed]

Shigeta, T.

K. Ohkubo and T. Shigeta, “Absolute fluorescent quantum efficiency of NBS phosphor standard samples,” J. Illum. Eng. Inst. Japan 83, 87–93 (1999).

Shirasaki, Y.

Y. Shirasaki, G. J. Supran, M. G. Bawendi, and V. Bulovic, “Emergence of colloidal quantum-dot light-emitting technologies,” Nat. Photonics 7(1), 13–23 (2013).
[Crossref]

Shu, S.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

Sohn, K.-S.

M. Kim, W. B. Park, B. Bang, C. H. Kim, and K.-S. Sohn, “Radiative and non-radiative decay rate of K2SiF6:Mn4+ phosphors,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(21), 5484–5489 (2015).
[Crossref]

Sommerdijk, J. L.

J. L. Sommerdijk, J. M. P. J. Verstegen, and A. Bril, “Luminescence of MeFX:Eu2+ (Me = Sr, Ba; X = Cl, Br),” J. Lumin. 8(6), 502–506 (1974).
[Crossref]

Sosa, R. F.

R. F. Sosa, E. R. Alvarez, M. A. Camacho, A. F. Munoz, and J. O. Rubio, “Time-resolved spectroscopy of the Eu2+ luminescence in KCl:Ba2+,Eu2+ KCl:Sr2+,Eu2+ and KBr:Sr2+,Eu2+,” J. Phys. Condens. Matter 7(32), 6561–6568 (1995).
[Crossref]

Srivastava, A. M.

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

Steckel, J. S.

S. Coe-Sullivan, W. Liu, P. Allen, and J. S. Steckel, “Quantum dots for LED downconversion in display applications,” ECS J. Solid State Sci. Technol. 2(2), R3026–R3030 (2013).
[Crossref]

Suehiro, T.

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and Properties of Green-Emitting β-SiAlON:Eu2+ Powder Phosphors for White Light-Emitting Diodes,” Appl. Phys. Lett. 86, 211905 (2009).
[Crossref]

Supran, G. J.

Y. Shirasaki, G. J. Supran, M. G. Bawendi, and V. Bulovic, “Emergence of colloidal quantum-dot light-emitting technologies,” Nat. Photonics 7(1), 13–23 (2013).
[Crossref]

Takahashi, K.

K. Takahashi, R.-J. Xie, and N. Hirosaki, “Toward higher color purity and narrower emission band β-sialon:Eu2+ by reducing the oxygen concentration,” Electrochem. Solid-State Lett. 14(11), E38–E40 (2011).
[Crossref]

Takahashi, T.

T. Takahashi and S. Adachi, “Synthesis of K2SiF6:Mn4+ red phosphor from Silica Glasses by wet chemical etching in HF/KMnO4 sollution,” Electrochem. Solid-State Lett. 12(8), J69–J71 (2009).
[Crossref]

S. Adachi and T. Takahashi, “Direct Synthesis and properties of K2SiF6:Mn4+ phosphor by wet chemical etching of Si wafer,” J. Appl. Phys. 104(2), 023512 (2008).
[Crossref]

Takeda, T.

R.-J. Xie, N. Hirosaki, and T. Takeda, “Wide color gamut backlight for liquid crystal displays using three-band phosphor-converted white light-emitting diodes,” Appl. Phys. Express 2, 022401 (2009).
[Crossref]

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Crystal and electronic structures, luminescence properties of Eu2+-doped Si6-zAlzOzN8-z and MySi6-zAlz-yOz+yN8-z-y (M = 2Li, Mg, Ca, Sr, Ba,” J. Solid State Chem. 181(12), 3200–3210 (2008).
[Crossref]

R.-J. Xie, N. Hirosaki, X.-J. Liu, T. Takeda, and H.-L. Li, “Crystal structure and photoluminescence of Mn2+-Mg2+ codoped gamma aluminum oxynitride (γ-AlON): A promising green phosphor for white light-emitting diodes,” Appl. Phys. Lett. 92(20), 201905 (2008).
[Crossref]

Tücks, A.

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

Uheda, K.

K. Uheda, N. Hirosaki, Y. Yamamoto, A. Naito, T. Nakajima, and H. Yamamoto, “Luminescence properties of a red phosphor, CaAlSiN3:Eu2+, for white light-emitting diodes,” Electrochem. Solid-State Lett. 9(4), H22–H25 (2006).
[Crossref]

Verstegen, J. M. P. J.

J. L. Sommerdijk, J. M. P. J. Verstegen, and A. Bril, “Luminescence of MeFX:Eu2+ (Me = Sr, Ba; X = Cl, Br),” J. Lumin. 8(6), 502–506 (1974).
[Crossref]

Wang, J.

S. S. Wang, W. T. Chen, Y. Li, J. Wang, H. S. Sheu, and R. S. Liu, “Neighboring-cation substitution tuning of photoluminescence by remote-controlled activator in phosphor lattice,” J. Am. Chem. Soc. 135(34), 12504–12507 (2013).
[Crossref] [PubMed]

Wang, S. S.

S. S. Wang, W. T. Chen, Y. Li, J. Wang, H. S. Sheu, and R. S. Liu, “Neighboring-cation substitution tuning of photoluminescence by remote-controlled activator in phosphor lattice,” J. Am. Chem. Soc. 135(34), 12504–12507 (2013).
[Crossref] [PubMed]

Weiler, V.

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

Wiechert, D.

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

Wilson, W. I.

K. H. Jack and W. I. Wilson, “Ceramics based on the Si-Al-O-N and related systems,” Nat. Phys. Sci (Lond.) 238(80), 28–29 (1972).
[Crossref]

Wochnik, A. S.

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

Wu, S.-T.

Xie, R.-J.

K. Takahashi, R.-J. Xie, and N. Hirosaki, “Toward higher color purity and narrower emission band β-sialon:Eu2+ by reducing the oxygen concentration,” Electrochem. Solid-State Lett. 14(11), E38–E40 (2011).
[Crossref]

R.-J. Xie, N. Hirosaki, and T. Takeda, “Wide color gamut backlight for liquid crystal displays using three-band phosphor-converted white light-emitting diodes,” Appl. Phys. Express 2, 022401 (2009).
[Crossref]

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and Properties of Green-Emitting β-SiAlON:Eu2+ Powder Phosphors for White Light-Emitting Diodes,” Appl. Phys. Lett. 86, 211905 (2009).
[Crossref]

R.-J. Xie, N. Hirosaki, X.-J. Liu, T. Takeda, and H.-L. Li, “Crystal structure and photoluminescence of Mn2+-Mg2+ codoped gamma aluminum oxynitride (γ-AlON): A promising green phosphor for white light-emitting diodes,” Appl. Phys. Lett. 92(20), 201905 (2008).
[Crossref]

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Crystal and electronic structures, luminescence properties of Eu2+-doped Si6-zAlzOzN8-z and MySi6-zAlz-yOz+yN8-z-y (M = 2Li, Mg, Ca, Sr, Ba,” J. Solid State Chem. 181(12), 3200–3210 (2008).
[Crossref]

R.-J. Xie, N. Hirosaki, H. L. Li, Y. Q. Li, and M. Mitomo, “Synthesis and photoluminescence properties of β-sialon:Eu2+ (Si6-zAlzOzN8-z:Eu2+) – A promising green oxynitride phosphor for white light-emitting diodes,” J. Electrochem. Soc. 154, J314–J319 (2008).
[Crossref]

Yamamoto, H.

K. Uheda, N. Hirosaki, Y. Yamamoto, A. Naito, T. Nakajima, and H. Yamamoto, “Luminescence properties of a red phosphor, CaAlSiN3:Eu2+, for white light-emitting diodes,” Electrochem. Solid-State Lett. 9(4), H22–H25 (2006).
[Crossref]

Yamamoto, Y.

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and Properties of Green-Emitting β-SiAlON:Eu2+ Powder Phosphors for White Light-Emitting Diodes,” Appl. Phys. Lett. 86, 211905 (2009).
[Crossref]

K. Uheda, N. Hirosaki, Y. Yamamoto, A. Naito, T. Nakajima, and H. Yamamoto, “Luminescence properties of a red phosphor, CaAlSiN3:Eu2+, for white light-emitting diodes,” Electrochem. Solid-State Lett. 9(4), H22–H25 (2006).
[Crossref]

Yang, H.

Zhu, H.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

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[Crossref]

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E. Jang, S. Jun, H. Jang, J. Lim, B. Kim, and Y. Kim, “White-light-emitting diodes with quantum dot color converters for display backlights,” Adv. Mater. 22(28), 3076–3080 (2010).
[Crossref] [PubMed]

Appl. Phys. Express (2)

R.-J. Xie, N. Hirosaki, and T. Takeda, “Wide color gamut backlight for liquid crystal displays using three-band phosphor-converted white light-emitting diodes,” Appl. Phys. Express 2, 022401 (2009).
[Crossref]

Y. Fukuda, K. Ishida, I. Mitsuishi, and S. Nunoue, “Luminescence properties of Eu2+-doped green-emitting Sr-Sialon phosphor and its application to white light-emitting diodes,” Appl. Phys. Express 2(1), 012401 (2009).
[Crossref]

Appl. Phys. Lett. (2)

N. Hirosaki, R.-J. Xie, K. Kimoto, T. Sekiguchi, Y. Yamamoto, T. Suehiro, and M. Mitomo, “Characterization and Properties of Green-Emitting β-SiAlON:Eu2+ Powder Phosphors for White Light-Emitting Diodes,” Appl. Phys. Lett. 86, 211905 (2009).
[Crossref]

R.-J. Xie, N. Hirosaki, X.-J. Liu, T. Takeda, and H.-L. Li, “Crystal structure and photoluminescence of Mn2+-Mg2+ codoped gamma aluminum oxynitride (γ-AlON): A promising green phosphor for white light-emitting diodes,” Appl. Phys. Lett. 92(20), 201905 (2008).
[Crossref]

Chem. Mater. (1)

A. A. Setlur, E. V. Radkov, C. S. Henderson, J.-H. Her, A. M. Srivastava, N. Karkada, M. S. Kishore, N. P. Kumar, D. Aesram, A. Deshpande, B. Kolodin, L. S. Grigorov, and U. Happek, “Energy-efficient, high-color-rendering LED lamps using oxyfluoride and fluoride phosphors,” Chem. Mater. 22(13), 4076–4082 (2010).
[Crossref]

ECS J. Solid State Sci. Technol. (1)

S. Coe-Sullivan, W. Liu, P. Allen, and J. S. Steckel, “Quantum dots for LED downconversion in display applications,” ECS J. Solid State Sci. Technol. 2(2), R3026–R3030 (2013).
[Crossref]

Electrochem. Solid-State Lett. (3)

T. Takahashi and S. Adachi, “Synthesis of K2SiF6:Mn4+ red phosphor from Silica Glasses by wet chemical etching in HF/KMnO4 sollution,” Electrochem. Solid-State Lett. 12(8), J69–J71 (2009).
[Crossref]

K. Uheda, N. Hirosaki, Y. Yamamoto, A. Naito, T. Nakajima, and H. Yamamoto, “Luminescence properties of a red phosphor, CaAlSiN3:Eu2+, for white light-emitting diodes,” Electrochem. Solid-State Lett. 9(4), H22–H25 (2006).
[Crossref]

K. Takahashi, R.-J. Xie, and N. Hirosaki, “Toward higher color purity and narrower emission band β-sialon:Eu2+ by reducing the oxygen concentration,” Electrochem. Solid-State Lett. 14(11), E38–E40 (2011).
[Crossref]

J. Am. Ceram. Soc. (1)

C. X. Liao, R. P. Cao, Z. J. Ma, Y. Li, G. P. Dong, K. N. Sharafudeen, and J. R. Qiu, “Synthesis of K2SiF6:Mn4+ phosphor from SiO2 powders via redox reaction in KF/KMnO4 solution and their application in warm-white LEDs,” J. Am. Ceram. Soc. 96(11), 3552–3556 (2013).
[Crossref]

J. Am. Chem. Soc. (1)

S. S. Wang, W. T. Chen, Y. Li, J. Wang, H. S. Sheu, and R. S. Liu, “Neighboring-cation substitution tuning of photoluminescence by remote-controlled activator in phosphor lattice,” J. Am. Chem. Soc. 135(34), 12504–12507 (2013).
[Crossref] [PubMed]

J. Appl. Phys. (1)

S. Adachi and T. Takahashi, “Direct Synthesis and properties of K2SiF6:Mn4+ phosphor by wet chemical etching of Si wafer,” J. Appl. Phys. 104(2), 023512 (2008).
[Crossref]

J. Electrochem. Soc. (2)

R.-J. Xie, N. Hirosaki, H. L. Li, Y. Q. Li, and M. Mitomo, “Synthesis and photoluminescence properties of β-sialon:Eu2+ (Si6-zAlzOzN8-z:Eu2+) – A promising green oxynitride phosphor for white light-emitting diodes,” J. Electrochem. Soc. 154, J314–J319 (2008).
[Crossref]

A. G. Paulusz, “Efficient Mn (IV) emission in fluorine coordination,” J. Electrochem. Soc. 120(7), 942–947 (1973).
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K. Ohkubo and T. Shigeta, “Absolute fluorescent quantum efficiency of NBS phosphor standard samples,” J. Illum. Eng. Inst. Japan 83, 87–93 (1999).

J. Lumin. (1)

J. L. Sommerdijk, J. M. P. J. Verstegen, and A. Bril, “Luminescence of MeFX:Eu2+ (Me = Sr, Ba; X = Cl, Br),” J. Lumin. 8(6), 502–506 (1974).
[Crossref]

J. Mater. Chem. C Mater. Opt. Electron. Devices (2)

M. Kim, W. B. Park, B. Bang, C. H. Kim, and K.-S. Sohn, “Radiative and non-radiative decay rate of K2SiF6:Mn4+ phosphors,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(21), 5484–5489 (2015).
[Crossref]

J. H. Oh, H. Kang, Y. J. Eo, H. K. Park, and Y. R. Do, “Synthesis of narrow-band red-emitting K2SiF6:Mn4+ phosphors for a deep red monochromatic LED and ultrahigh color quality warm-white LEDs,” J. Mater. Chem. C Mater. Opt. Electron. Devices 3(3), 607–615 (2015).
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J. Phys. Condens. Matter (1)

R. F. Sosa, E. R. Alvarez, M. A. Camacho, A. F. Munoz, and J. O. Rubio, “Time-resolved spectroscopy of the Eu2+ luminescence in KCl:Ba2+,Eu2+ KCl:Sr2+,Eu2+ and KBr:Sr2+,Eu2+,” J. Phys. Condens. Matter 7(32), 6561–6568 (1995).
[Crossref]

J. Solid State Chem. (1)

Y. Q. Li, N. Hirosaki, R.-J. Xie, T. Takeda, and M. Mitomo, “Crystal and electronic structures, luminescence properties of Eu2+-doped Si6-zAlzOzN8-z and MySi6-zAlz-yOz+yN8-z-y (M = 2Li, Mg, Ca, Sr, Ba,” J. Solid State Chem. 181(12), 3200–3210 (2008).
[Crossref]

J. Symp. Dig. (1)

Y. Ito, T. Hori, T. Kusunoki, H. Nomura, and H. Kondo, “A phosphor sheet and a backlight system providing wider color gamut for LCDs,” J. Symp. Dig. 22(8), 419–428 (2014).

Jpn. J. Appl. Phys. (1)

Y. Fukuda, N. Matsuda, A. Okada, and I. Mitsuishi, “White light-emitting diodes for wide-color-gamut backlight using green-emitting Sr-Sialon phosphor,” Jpn. J. Appl. Phys. 51(12), 122101 (2012).
[Crossref]

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H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R. S. Liu, and X. Chen, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[PubMed]

Nat. Mater. (1)

P. Pust, V. Weiler, C. Hecht, A. Tücks, A. S. Wochnik, A. K. Henß, D. Wiechert, C. Scheu, P. J. Schmidt, and W. Schnick, “Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material,” Nat. Mater. 13(9), 891–896 (2014).
[Crossref] [PubMed]

Nat. Photonics (1)

Y. Shirasaki, G. J. Supran, M. G. Bawendi, and V. Bulovic, “Emergence of colloidal quantum-dot light-emitting technologies,” Nat. Photonics 7(1), 13–23 (2013).
[Crossref]

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Figures (10)

Fig. 1
Fig. 1 Schematics of the preparation of K2SiF6:Mn4+ by a two-step co-precipitation method. The detailed description is given in the text.
Fig. 2
Fig. 2 (a) XRD patttens, (b) SEM iamge, and (c-f) elemental mapping of K, Si, F, and Mn. The XRD partterns reveal a cubic phase of KSF. The polyhedron shape of the phosphor indicates well crystallized particles that contributes to high luminescence.
Fig. 3
Fig. 3 (a) SEM image of rod-liked β-sialon:Eu2+ prepared by gas-pressure sintering, and (b) XRD patterns ofβ-sialon:Eu2+, indicative of a phase pure β-sialon:Eu2+ with high crystallinity.
Fig. 4
Fig. 4 (a) Excitation and Emission spectra of K2SiF6:Mn4+, β-sialon:Eu2+ and CaAlSiN3:Eu2+; (b) absorption efficiency of K2SiF6:Mn4+ and CaAlSiN3:Eu2+. The emission spectra of all samples were exicted at 450 nm, and the excitation spectra of K2SiF6:Mn4+ and CaAlSiN3:Eu2+ were monitored at 631 and 650 nm, respectively.
Fig. 5
Fig. 5 Decay curves of K2SiF6:Mn4+em = 631 nm) and β-sialon:Eu2+em = 535 nm) measured under 370 nm excitation. Both show a single exponential decay, but different decay times. The decay time of Eu2+ is much shorter than that of Mn4+.
Fig. 6
Fig. 6 Absorption efficiency (a), internal quantum efficiency (b) and external quantum efficiency (c) as a function of the excitation wavelength of β-sialon:Eu2+ and KSF:Mn4+. It indicates that (i) both phosphpors have the similar quantum efficiency under 450 nm excitation; (ii) the absorption of green light (i.e. from β-sialon:Eu2+) by KSF is quite small (less than 20%).
Fig. 7
Fig. 7 Thermal quenching of K2SiF6:Mn4+ and β-sialon:Eu2+ when excited at 450 nm.
Fig. 8
Fig. 8 Temperature-dependent quantum efficiency of β-sialon:Eu2+ and K2SiF6:Mn4+ when excited at 450 nm. This indicates that both samples have high thermal stability, and β-sialon:Eu2+ is superior to KSF:Mn4+ at higher tempetures (> 200°C).
Fig. 9
Fig. 9 Electroluminescence spcetra of the as-prepared wLEDs (a-c) and of the wLEDs after filtering (d-f).
Fig. 10
Fig. 10 The CIE 1931 (a) and CIE 1976 (b) color coordinates of the NTSC standard (black dotted triangles) and the wLED with the color tempetaure of 8611 K (white triangles).

Tables (3)

Tables Icon

Table 1 Narrow-band phosphor candidates used for wLED backlight.

Tables Icon

Table 2 Optical properties of wLED backlight using K2SiF6:Mn4+ and β-sialon:Eu2+

Tables Icon

Table 3 Optical properties of phosphor-converted wLEDs for LCD backlights

Equations (2)

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KF + HF +  KMnO 4 +  H 2 O 2 K 2 MnF 6 +  H 2 +  O 2   KHF 2 + HF +  H 2 SiF 6 +  K 2 MnF 6   K 2 SiF 6 : Mn 4+    
η 0 = λP( λ )dλ λE( λ )dλ η i = λP( λ )dλ λ{ E( λ )R( λ ) }dλ α abs = λ{ E(λ)R(λ) }dλ λE(λ)dλ

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