Abstract

Modifying the structure of quantum dots (QDs) is regarded as one of the promising way to improve the charge transfer balance of quantum dot light-emitting diodes (QLEDs). In this paper, we report highly bright Cd0.1Zn0.9S/CdSe/CdS quantum dots by optimizing the CdSe shell and CdS outer shell and explore their application in QLEDs. We find that with appropriate thicknesses of CdSe and CdS shell the charge transfer balance of the device can be improved. Comparable studies on two red QLEDs with Cd0.1Zn0.9S/CdSe/CdS and CdSe/CdS show that the external quantum efficiency (EQE) of the Cd0.1Zn0.9S/CdSe/CdS device is over 3 folds higher than its counterpart, implying that structure of the QDs plays an important role in controlling the charge transfer balance of the QLEDs.

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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  1. K. S. Cho, E. K. Lee, W. J. Joo, E. Jang, T. H. Kim, J. L. Sang, S. J. Kwon, J. Y. Han, B. K. Kim, and B. L. Choi, “High-performance crosslinked colloidal quantum-dot light-emitting diodes,” Nat. Photonics 3(6), 341–345 (2009).
    [Crossref]
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    [Crossref]
  3. L. Qian, Y. Zheng, J. Xue, and P. H. Holloway, “Stable and efficient quantum-dot light-emitting diodes based on solution-processed multilayer structures,” Nat. Photonics 5(9), 543–548 (2011).
    [Crossref]
  4. H. Shen, W. Cao, N. T. Shewmon, C. Yang, L. S. Li, and J. Xue, “High-efficiency, low turn-on voltage blue-violet quantum-dot-based light-emitting diodes,” Nano Lett. 15(2), 1211–1216 (2015).
    [Crossref]
  5. J. M. Caruge, J. E. Halpert, V. Wood, V. Bulovi, and M. G. Bawendi, “Colloidal quantum-dot light-emitting diodes with metal-oxide charge transport layers,” Nat. Photonics 2(4), 247–250 (2008).
    [Crossref]
  6. L. Bai, X. Yang, C. Y. Ang, K. T. Nguyen, T. Ding, P. Bose, Q. Gao, A. K. Mandal, X. W. Sun, and H. V. Demir, “A quinoxaline based N-heteroacene interfacial layer for efficient hole-injection in quantum dot light-emitting diodes,” Nanoscale 7(27), 11531–11535 (2015).
    [Crossref]
  7. C. Lee, J. Lim, and K. B. Wan, “Efficient full-color colloidal quantum dot light-emitting diodes using an inverted device structure,” Nano Lett. 12(5), 2362–2366 (2012).
    [Crossref]
  8. B. S. Mashford, M. Stevenson, Z. Popovic, C. Hamilton, Z. Zhou, C. Breen, J. Steckel, V. Bulovic, M. Bawendi, and S. Coesullivan, “High-efficiency quantum-dot light-emitting devices with enhanced charge injection,” Nat. Photonics 7(5), 407–412 (2013).
    [Crossref]
  9. D. Xingliang, Z. Zhenxing, J. Yizheng, N. Yuan, C. Hujia, L. Xiaoyong, C. Liwei, W. Jianpu, and P. Xiaogang, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
    [Crossref]
  10. Y. Yang, Z. Ying, W. Cao, A. Titov, J. Hyvonen, J. R. Manders, J. Xue, P. H. Holloway, and Q. Lei, “High-efficiency light-emitting devices based on quantum dots with tailored nanostructures,” Nat. Photonics 9(4), 259–266 (2015).
    [Crossref]
  11. K. B. Wan, Y. S. Park, J. Lim, D. Lee, L. A. Padilha, H. Mcdaniel, I. Robel, C. Lee, J. M. Pietryga, and V. I. Klimov, “Controlling the influence of Auger recombination on the performance of quantum-dot light-emitting diodes,” Nat. Commun. 4(1), 2661 (2013).
    [Crossref]
  12. W. Lin, Y. Niu, R. Meng, L. Huang, H. Cao, Z. Zhang, H. Qin, and X. Peng, “Shell-thickness dependent optical properties of CdSe/CdS core/shell nanocrystals coated with thiol ligands,” Nano Res. 9(1), 260–271 (2016).
    [Crossref]
  13. Y. Niu, C. Pu, R. Lai, R. Meng, W. Lin, H. Qin, and X. Peng, “One-pot/three-step synthesis of zinc-blende CdSe/CdS core/shell nanocrystals with thick shells,” Nano Res. 10(4), 1149–1162 (2017).
    [Crossref]
  14. P. Maity, T. Debnath, and H. N. Ghosh, “Ultrafast Charge Carrier Delocalization in CdSe/CdS Quasi Type II and CdS/CdSe Inverted Type I Core/Shell: A Structural Analysis through Carrier Quenching Study,” J. Phys. Chem. C 119(46), 26202–26211 (2015).
    [Crossref]
  15. J. Lim, B. G. Jeong, M. Park, J. K. Kim, J. M. Pietryga, Y.-S. Park, V. I. Klimov, C. Lee, D. C. Lee, and W. K. Bae, “Influence of Shell Thickness on the Performance of Light-Emitting Devices Based on CdSe/Zn1-XCdXS Core/Shell Heterostructured Quantum Dots,” Adv. Mater. 26(47), 8034–8040 (2014).
    [Crossref]
  16. B. N. Pal, Y. Ghosh, S. Brovelli, R. Laocharoensuk, V. I. Klimov, J. A. Hollingsworth, and H. Htoon, “‘Giant’ CdSe/CdS core/shell nanocrystal quantum dots as efficient electroluminescent materials: strong influence of shell thickness on light-emitting diode performance,” Nano Lett. 12(1), 331–336 (2012).
    [Crossref]
  17. X. Jin, J. Bai, X. Gu, C. Chang, H. Shen, Q. Zhang, F. Li, Z. Chen, and Q. Li, “Efficient light-emitting diodes based on reverse type-I quantum dots,” Opt. Mater. Express 7(12), 4395–4407 (2017).
    [Crossref]
  18. B. G. Jeong, Y.-S. Park, J. H. Chang, I. Cho, J. K. Kim, H. Kim, K. Char, J. Cho, V. I. Klimov, P. Park, D. C. Lee, and W. K. Bae, “Colloidal Spherical Quantum Wells with Near-Unity Photoluminescence Quantum Yield and Suppressed Blinking,” ACS Nano 10(10), 9297–9305 (2016).
    [Crossref]
  19. K. Lu, Y. Wang, J. Yuan, Z. Cui, G. Shi, S. Shi, L. Han, S. Chen, Y. Zhang, and X. Ling, “Efficient PbS quantum dot solar cells employing a conventional structure,” J. Mater. Chem. A 5(45), 23960–23966 (2017).
    [Crossref]
  20. Q. Lin, B. Song, H. Z. Wang, F. Zhang, F. Chen, L. Wang, F. Guo, L. S. Li, and H. Shen, “High-Efficiency Deep-Red Quantum-Dot Light-Emitting Diodes with Type-II CdSe/CdTe Core/Shell Quantum Dots as Emissive Layers,” J. Mater. Chem. C 4(30), 7223–7229 (2016).
    [Crossref]
  21. B. S. Mashford, T.-L. Nguyen, G. J. Wilson, and P. Mulvaney, “All-inorganic quantum-dot light-emitting devices formed via low-cost, wet-chemical processing,” J. Mater. Chem. 20(1), 167–172 (2010).
    [Crossref]
  22. V. Wood, M. J. Panzer, J.-M. Caruge, J. E. Halpert, M. G. Bawendi, and V. Bulovic, “Air-stable operation of transparent, colloidal quantum dot based LEDs with a unipolar device architecture,” Nano Lett. 10(1), 24–29 (2010).
    [Crossref]
  23. A. Piryatinski, S. A. Ivanov, S. Tretiak, and V. I. Klimov, “Effect of quantum and dielectric confinement on the exciton− exciton interaction energy in type II core/shell semiconductor nanocrystals,” Nano Lett. 7(1), 108–115 (2007).
    [Crossref]
  24. S. Chen, X. Jiang, and F. So, “Hole injection polymer effect on degradation of organic light-emitting diodes,” Org. Electron. 14(10), 2518–2522 (2013).
    [Crossref]
  25. F. So and D. Kondakov, “Degradation mechanisms in small-molecule and polymer organic light-emitting diodes,” Adv. Mater. 22(34), 3762–3777 (2010).
    [Crossref]
  26. X. Dai, Z. Zhang, Y. Jin, Y. Niu, H. Cao, X. Liang, L. Chen, J. Wang, and X. Peng, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
    [Crossref]

2017 (3)

Y. Niu, C. Pu, R. Lai, R. Meng, W. Lin, H. Qin, and X. Peng, “One-pot/three-step synthesis of zinc-blende CdSe/CdS core/shell nanocrystals with thick shells,” Nano Res. 10(4), 1149–1162 (2017).
[Crossref]

K. Lu, Y. Wang, J. Yuan, Z. Cui, G. Shi, S. Shi, L. Han, S. Chen, Y. Zhang, and X. Ling, “Efficient PbS quantum dot solar cells employing a conventional structure,” J. Mater. Chem. A 5(45), 23960–23966 (2017).
[Crossref]

X. Jin, J. Bai, X. Gu, C. Chang, H. Shen, Q. Zhang, F. Li, Z. Chen, and Q. Li, “Efficient light-emitting diodes based on reverse type-I quantum dots,” Opt. Mater. Express 7(12), 4395–4407 (2017).
[Crossref]

2016 (3)

Q. Lin, B. Song, H. Z. Wang, F. Zhang, F. Chen, L. Wang, F. Guo, L. S. Li, and H. Shen, “High-Efficiency Deep-Red Quantum-Dot Light-Emitting Diodes with Type-II CdSe/CdTe Core/Shell Quantum Dots as Emissive Layers,” J. Mater. Chem. C 4(30), 7223–7229 (2016).
[Crossref]

B. G. Jeong, Y.-S. Park, J. H. Chang, I. Cho, J. K. Kim, H. Kim, K. Char, J. Cho, V. I. Klimov, P. Park, D. C. Lee, and W. K. Bae, “Colloidal Spherical Quantum Wells with Near-Unity Photoluminescence Quantum Yield and Suppressed Blinking,” ACS Nano 10(10), 9297–9305 (2016).
[Crossref]

W. Lin, Y. Niu, R. Meng, L. Huang, H. Cao, Z. Zhang, H. Qin, and X. Peng, “Shell-thickness dependent optical properties of CdSe/CdS core/shell nanocrystals coated with thiol ligands,” Nano Res. 9(1), 260–271 (2016).
[Crossref]

2015 (4)

Y. Yang, Z. Ying, W. Cao, A. Titov, J. Hyvonen, J. R. Manders, J. Xue, P. H. Holloway, and Q. Lei, “High-efficiency light-emitting devices based on quantum dots with tailored nanostructures,” Nat. Photonics 9(4), 259–266 (2015).
[Crossref]

P. Maity, T. Debnath, and H. N. Ghosh, “Ultrafast Charge Carrier Delocalization in CdSe/CdS Quasi Type II and CdS/CdSe Inverted Type I Core/Shell: A Structural Analysis through Carrier Quenching Study,” J. Phys. Chem. C 119(46), 26202–26211 (2015).
[Crossref]

H. Shen, W. Cao, N. T. Shewmon, C. Yang, L. S. Li, and J. Xue, “High-efficiency, low turn-on voltage blue-violet quantum-dot-based light-emitting diodes,” Nano Lett. 15(2), 1211–1216 (2015).
[Crossref]

L. Bai, X. Yang, C. Y. Ang, K. T. Nguyen, T. Ding, P. Bose, Q. Gao, A. K. Mandal, X. W. Sun, and H. V. Demir, “A quinoxaline based N-heteroacene interfacial layer for efficient hole-injection in quantum dot light-emitting diodes,” Nanoscale 7(27), 11531–11535 (2015).
[Crossref]

2014 (3)

J. Lim, B. G. Jeong, M. Park, J. K. Kim, J. M. Pietryga, Y.-S. Park, V. I. Klimov, C. Lee, D. C. Lee, and W. K. Bae, “Influence of Shell Thickness on the Performance of Light-Emitting Devices Based on CdSe/Zn1-XCdXS Core/Shell Heterostructured Quantum Dots,” Adv. Mater. 26(47), 8034–8040 (2014).
[Crossref]

D. Xingliang, Z. Zhenxing, J. Yizheng, N. Yuan, C. Hujia, L. Xiaoyong, C. Liwei, W. Jianpu, and P. Xiaogang, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
[Crossref]

X. Dai, Z. Zhang, Y. Jin, Y. Niu, H. Cao, X. Liang, L. Chen, J. Wang, and X. Peng, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
[Crossref]

2013 (3)

S. Chen, X. Jiang, and F. So, “Hole injection polymer effect on degradation of organic light-emitting diodes,” Org. Electron. 14(10), 2518–2522 (2013).
[Crossref]

K. B. Wan, Y. S. Park, J. Lim, D. Lee, L. A. Padilha, H. Mcdaniel, I. Robel, C. Lee, J. M. Pietryga, and V. I. Klimov, “Controlling the influence of Auger recombination on the performance of quantum-dot light-emitting diodes,” Nat. Commun. 4(1), 2661 (2013).
[Crossref]

B. S. Mashford, M. Stevenson, Z. Popovic, C. Hamilton, Z. Zhou, C. Breen, J. Steckel, V. Bulovic, M. Bawendi, and S. Coesullivan, “High-efficiency quantum-dot light-emitting devices with enhanced charge injection,” Nat. Photonics 7(5), 407–412 (2013).
[Crossref]

2012 (2)

C. Lee, J. Lim, and K. B. Wan, “Efficient full-color colloidal quantum dot light-emitting diodes using an inverted device structure,” Nano Lett. 12(5), 2362–2366 (2012).
[Crossref]

B. N. Pal, Y. Ghosh, S. Brovelli, R. Laocharoensuk, V. I. Klimov, J. A. Hollingsworth, and H. Htoon, “‘Giant’ CdSe/CdS core/shell nanocrystal quantum dots as efficient electroluminescent materials: strong influence of shell thickness on light-emitting diode performance,” Nano Lett. 12(1), 331–336 (2012).
[Crossref]

2011 (1)

L. Qian, Y. Zheng, J. Xue, and P. H. Holloway, “Stable and efficient quantum-dot light-emitting diodes based on solution-processed multilayer structures,” Nat. Photonics 5(9), 543–548 (2011).
[Crossref]

2010 (3)

F. So and D. Kondakov, “Degradation mechanisms in small-molecule and polymer organic light-emitting diodes,” Adv. Mater. 22(34), 3762–3777 (2010).
[Crossref]

B. S. Mashford, T.-L. Nguyen, G. J. Wilson, and P. Mulvaney, “All-inorganic quantum-dot light-emitting devices formed via low-cost, wet-chemical processing,” J. Mater. Chem. 20(1), 167–172 (2010).
[Crossref]

V. Wood, M. J. Panzer, J.-M. Caruge, J. E. Halpert, M. G. Bawendi, and V. Bulovic, “Air-stable operation of transparent, colloidal quantum dot based LEDs with a unipolar device architecture,” Nano Lett. 10(1), 24–29 (2010).
[Crossref]

2009 (1)

K. S. Cho, E. K. Lee, W. J. Joo, E. Jang, T. H. Kim, J. L. Sang, S. J. Kwon, J. Y. Han, B. K. Kim, and B. L. Choi, “High-performance crosslinked colloidal quantum-dot light-emitting diodes,” Nat. Photonics 3(6), 341–345 (2009).
[Crossref]

2008 (1)

J. M. Caruge, J. E. Halpert, V. Wood, V. Bulovi, and M. G. Bawendi, “Colloidal quantum-dot light-emitting diodes with metal-oxide charge transport layers,” Nat. Photonics 2(4), 247–250 (2008).
[Crossref]

2007 (1)

A. Piryatinski, S. A. Ivanov, S. Tretiak, and V. I. Klimov, “Effect of quantum and dielectric confinement on the exciton− exciton interaction energy in type II core/shell semiconductor nanocrystals,” Nano Lett. 7(1), 108–115 (2007).
[Crossref]

1994 (1)

V. L. Colvin, M. C. Schlamp, and A. P. Alivisatos, “Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer,” Nature 370(6488), 354–357 (1994).
[Crossref]

Alivisatos, A. P.

V. L. Colvin, M. C. Schlamp, and A. P. Alivisatos, “Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer,” Nature 370(6488), 354–357 (1994).
[Crossref]

Ang, C. Y.

L. Bai, X. Yang, C. Y. Ang, K. T. Nguyen, T. Ding, P. Bose, Q. Gao, A. K. Mandal, X. W. Sun, and H. V. Demir, “A quinoxaline based N-heteroacene interfacial layer for efficient hole-injection in quantum dot light-emitting diodes,” Nanoscale 7(27), 11531–11535 (2015).
[Crossref]

Bae, W. K.

B. G. Jeong, Y.-S. Park, J. H. Chang, I. Cho, J. K. Kim, H. Kim, K. Char, J. Cho, V. I. Klimov, P. Park, D. C. Lee, and W. K. Bae, “Colloidal Spherical Quantum Wells with Near-Unity Photoluminescence Quantum Yield and Suppressed Blinking,” ACS Nano 10(10), 9297–9305 (2016).
[Crossref]

J. Lim, B. G. Jeong, M. Park, J. K. Kim, J. M. Pietryga, Y.-S. Park, V. I. Klimov, C. Lee, D. C. Lee, and W. K. Bae, “Influence of Shell Thickness on the Performance of Light-Emitting Devices Based on CdSe/Zn1-XCdXS Core/Shell Heterostructured Quantum Dots,” Adv. Mater. 26(47), 8034–8040 (2014).
[Crossref]

Bai, J.

Bai, L.

L. Bai, X. Yang, C. Y. Ang, K. T. Nguyen, T. Ding, P. Bose, Q. Gao, A. K. Mandal, X. W. Sun, and H. V. Demir, “A quinoxaline based N-heteroacene interfacial layer for efficient hole-injection in quantum dot light-emitting diodes,” Nanoscale 7(27), 11531–11535 (2015).
[Crossref]

Bawendi, M.

B. S. Mashford, M. Stevenson, Z. Popovic, C. Hamilton, Z. Zhou, C. Breen, J. Steckel, V. Bulovic, M. Bawendi, and S. Coesullivan, “High-efficiency quantum-dot light-emitting devices with enhanced charge injection,” Nat. Photonics 7(5), 407–412 (2013).
[Crossref]

Bawendi, M. G.

V. Wood, M. J. Panzer, J.-M. Caruge, J. E. Halpert, M. G. Bawendi, and V. Bulovic, “Air-stable operation of transparent, colloidal quantum dot based LEDs with a unipolar device architecture,” Nano Lett. 10(1), 24–29 (2010).
[Crossref]

J. M. Caruge, J. E. Halpert, V. Wood, V. Bulovi, and M. G. Bawendi, “Colloidal quantum-dot light-emitting diodes with metal-oxide charge transport layers,” Nat. Photonics 2(4), 247–250 (2008).
[Crossref]

Bose, P.

L. Bai, X. Yang, C. Y. Ang, K. T. Nguyen, T. Ding, P. Bose, Q. Gao, A. K. Mandal, X. W. Sun, and H. V. Demir, “A quinoxaline based N-heteroacene interfacial layer for efficient hole-injection in quantum dot light-emitting diodes,” Nanoscale 7(27), 11531–11535 (2015).
[Crossref]

Breen, C.

B. S. Mashford, M. Stevenson, Z. Popovic, C. Hamilton, Z. Zhou, C. Breen, J. Steckel, V. Bulovic, M. Bawendi, and S. Coesullivan, “High-efficiency quantum-dot light-emitting devices with enhanced charge injection,” Nat. Photonics 7(5), 407–412 (2013).
[Crossref]

Brovelli, S.

B. N. Pal, Y. Ghosh, S. Brovelli, R. Laocharoensuk, V. I. Klimov, J. A. Hollingsworth, and H. Htoon, “‘Giant’ CdSe/CdS core/shell nanocrystal quantum dots as efficient electroluminescent materials: strong influence of shell thickness on light-emitting diode performance,” Nano Lett. 12(1), 331–336 (2012).
[Crossref]

Bulovi, V.

J. M. Caruge, J. E. Halpert, V. Wood, V. Bulovi, and M. G. Bawendi, “Colloidal quantum-dot light-emitting diodes with metal-oxide charge transport layers,” Nat. Photonics 2(4), 247–250 (2008).
[Crossref]

Bulovic, V.

B. S. Mashford, M. Stevenson, Z. Popovic, C. Hamilton, Z. Zhou, C. Breen, J. Steckel, V. Bulovic, M. Bawendi, and S. Coesullivan, “High-efficiency quantum-dot light-emitting devices with enhanced charge injection,” Nat. Photonics 7(5), 407–412 (2013).
[Crossref]

V. Wood, M. J. Panzer, J.-M. Caruge, J. E. Halpert, M. G. Bawendi, and V. Bulovic, “Air-stable operation of transparent, colloidal quantum dot based LEDs with a unipolar device architecture,” Nano Lett. 10(1), 24–29 (2010).
[Crossref]

Cao, H.

W. Lin, Y. Niu, R. Meng, L. Huang, H. Cao, Z. Zhang, H. Qin, and X. Peng, “Shell-thickness dependent optical properties of CdSe/CdS core/shell nanocrystals coated with thiol ligands,” Nano Res. 9(1), 260–271 (2016).
[Crossref]

X. Dai, Z. Zhang, Y. Jin, Y. Niu, H. Cao, X. Liang, L. Chen, J. Wang, and X. Peng, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
[Crossref]

Cao, W.

Y. Yang, Z. Ying, W. Cao, A. Titov, J. Hyvonen, J. R. Manders, J. Xue, P. H. Holloway, and Q. Lei, “High-efficiency light-emitting devices based on quantum dots with tailored nanostructures,” Nat. Photonics 9(4), 259–266 (2015).
[Crossref]

H. Shen, W. Cao, N. T. Shewmon, C. Yang, L. S. Li, and J. Xue, “High-efficiency, low turn-on voltage blue-violet quantum-dot-based light-emitting diodes,” Nano Lett. 15(2), 1211–1216 (2015).
[Crossref]

Caruge, J. M.

J. M. Caruge, J. E. Halpert, V. Wood, V. Bulovi, and M. G. Bawendi, “Colloidal quantum-dot light-emitting diodes with metal-oxide charge transport layers,” Nat. Photonics 2(4), 247–250 (2008).
[Crossref]

Caruge, J.-M.

V. Wood, M. J. Panzer, J.-M. Caruge, J. E. Halpert, M. G. Bawendi, and V. Bulovic, “Air-stable operation of transparent, colloidal quantum dot based LEDs with a unipolar device architecture,” Nano Lett. 10(1), 24–29 (2010).
[Crossref]

Chang, C.

Chang, J. H.

B. G. Jeong, Y.-S. Park, J. H. Chang, I. Cho, J. K. Kim, H. Kim, K. Char, J. Cho, V. I. Klimov, P. Park, D. C. Lee, and W. K. Bae, “Colloidal Spherical Quantum Wells with Near-Unity Photoluminescence Quantum Yield and Suppressed Blinking,” ACS Nano 10(10), 9297–9305 (2016).
[Crossref]

Char, K.

B. G. Jeong, Y.-S. Park, J. H. Chang, I. Cho, J. K. Kim, H. Kim, K. Char, J. Cho, V. I. Klimov, P. Park, D. C. Lee, and W. K. Bae, “Colloidal Spherical Quantum Wells with Near-Unity Photoluminescence Quantum Yield and Suppressed Blinking,” ACS Nano 10(10), 9297–9305 (2016).
[Crossref]

Chen, F.

Q. Lin, B. Song, H. Z. Wang, F. Zhang, F. Chen, L. Wang, F. Guo, L. S. Li, and H. Shen, “High-Efficiency Deep-Red Quantum-Dot Light-Emitting Diodes with Type-II CdSe/CdTe Core/Shell Quantum Dots as Emissive Layers,” J. Mater. Chem. C 4(30), 7223–7229 (2016).
[Crossref]

Chen, L.

X. Dai, Z. Zhang, Y. Jin, Y. Niu, H. Cao, X. Liang, L. Chen, J. Wang, and X. Peng, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
[Crossref]

Chen, S.

K. Lu, Y. Wang, J. Yuan, Z. Cui, G. Shi, S. Shi, L. Han, S. Chen, Y. Zhang, and X. Ling, “Efficient PbS quantum dot solar cells employing a conventional structure,” J. Mater. Chem. A 5(45), 23960–23966 (2017).
[Crossref]

S. Chen, X. Jiang, and F. So, “Hole injection polymer effect on degradation of organic light-emitting diodes,” Org. Electron. 14(10), 2518–2522 (2013).
[Crossref]

Chen, Z.

Cho, I.

B. G. Jeong, Y.-S. Park, J. H. Chang, I. Cho, J. K. Kim, H. Kim, K. Char, J. Cho, V. I. Klimov, P. Park, D. C. Lee, and W. K. Bae, “Colloidal Spherical Quantum Wells with Near-Unity Photoluminescence Quantum Yield and Suppressed Blinking,” ACS Nano 10(10), 9297–9305 (2016).
[Crossref]

Cho, J.

B. G. Jeong, Y.-S. Park, J. H. Chang, I. Cho, J. K. Kim, H. Kim, K. Char, J. Cho, V. I. Klimov, P. Park, D. C. Lee, and W. K. Bae, “Colloidal Spherical Quantum Wells with Near-Unity Photoluminescence Quantum Yield and Suppressed Blinking,” ACS Nano 10(10), 9297–9305 (2016).
[Crossref]

Cho, K. S.

K. S. Cho, E. K. Lee, W. J. Joo, E. Jang, T. H. Kim, J. L. Sang, S. J. Kwon, J. Y. Han, B. K. Kim, and B. L. Choi, “High-performance crosslinked colloidal quantum-dot light-emitting diodes,” Nat. Photonics 3(6), 341–345 (2009).
[Crossref]

Choi, B. L.

K. S. Cho, E. K. Lee, W. J. Joo, E. Jang, T. H. Kim, J. L. Sang, S. J. Kwon, J. Y. Han, B. K. Kim, and B. L. Choi, “High-performance crosslinked colloidal quantum-dot light-emitting diodes,” Nat. Photonics 3(6), 341–345 (2009).
[Crossref]

Coesullivan, S.

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C. Lee, J. Lim, and K. B. Wan, “Efficient full-color colloidal quantum dot light-emitting diodes using an inverted device structure,” Nano Lett. 12(5), 2362–2366 (2012).
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L. Bai, X. Yang, C. Y. Ang, K. T. Nguyen, T. Ding, P. Bose, Q. Gao, A. K. Mandal, X. W. Sun, and H. V. Demir, “A quinoxaline based N-heteroacene interfacial layer for efficient hole-injection in quantum dot light-emitting diodes,” Nanoscale 7(27), 11531–11535 (2015).
[Crossref]

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Y. Yang, Z. Ying, W. Cao, A. Titov, J. Hyvonen, J. R. Manders, J. Xue, P. H. Holloway, and Q. Lei, “High-efficiency light-emitting devices based on quantum dots with tailored nanostructures,” Nat. Photonics 9(4), 259–266 (2015).
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W. Lin, Y. Niu, R. Meng, L. Huang, H. Cao, Z. Zhang, H. Qin, and X. Peng, “Shell-thickness dependent optical properties of CdSe/CdS core/shell nanocrystals coated with thiol ligands,” Nano Res. 9(1), 260–271 (2016).
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B. S. Mashford, T.-L. Nguyen, G. J. Wilson, and P. Mulvaney, “All-inorganic quantum-dot light-emitting devices formed via low-cost, wet-chemical processing,” J. Mater. Chem. 20(1), 167–172 (2010).
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W. Lin, Y. Niu, R. Meng, L. Huang, H. Cao, Z. Zhang, H. Qin, and X. Peng, “Shell-thickness dependent optical properties of CdSe/CdS core/shell nanocrystals coated with thiol ligands,” Nano Res. 9(1), 260–271 (2016).
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X. Dai, Z. Zhang, Y. Jin, Y. Niu, H. Cao, X. Liang, L. Chen, J. Wang, and X. Peng, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
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Padilha, L. A.

K. B. Wan, Y. S. Park, J. Lim, D. Lee, L. A. Padilha, H. Mcdaniel, I. Robel, C. Lee, J. M. Pietryga, and V. I. Klimov, “Controlling the influence of Auger recombination on the performance of quantum-dot light-emitting diodes,” Nat. Commun. 4(1), 2661 (2013).
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V. Wood, M. J. Panzer, J.-M. Caruge, J. E. Halpert, M. G. Bawendi, and V. Bulovic, “Air-stable operation of transparent, colloidal quantum dot based LEDs with a unipolar device architecture,” Nano Lett. 10(1), 24–29 (2010).
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K. B. Wan, Y. S. Park, J. Lim, D. Lee, L. A. Padilha, H. Mcdaniel, I. Robel, C. Lee, J. M. Pietryga, and V. I. Klimov, “Controlling the influence of Auger recombination on the performance of quantum-dot light-emitting diodes,” Nat. Commun. 4(1), 2661 (2013).
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X. Dai, Z. Zhang, Y. Jin, Y. Niu, H. Cao, X. Liang, L. Chen, J. Wang, and X. Peng, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
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Y. Yang, Z. Ying, W. Cao, A. Titov, J. Hyvonen, J. R. Manders, J. Xue, P. H. Holloway, and Q. Lei, “High-efficiency light-emitting devices based on quantum dots with tailored nanostructures,” Nat. Photonics 9(4), 259–266 (2015).
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A. Piryatinski, S. A. Ivanov, S. Tretiak, and V. I. Klimov, “Effect of quantum and dielectric confinement on the exciton− exciton interaction energy in type II core/shell semiconductor nanocrystals,” Nano Lett. 7(1), 108–115 (2007).
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K. B. Wan, Y. S. Park, J. Lim, D. Lee, L. A. Padilha, H. Mcdaniel, I. Robel, C. Lee, J. M. Pietryga, and V. I. Klimov, “Controlling the influence of Auger recombination on the performance of quantum-dot light-emitting diodes,” Nat. Commun. 4(1), 2661 (2013).
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Q. Lin, B. Song, H. Z. Wang, F. Zhang, F. Chen, L. Wang, F. Guo, L. S. Li, and H. Shen, “High-Efficiency Deep-Red Quantum-Dot Light-Emitting Diodes with Type-II CdSe/CdTe Core/Shell Quantum Dots as Emissive Layers,” J. Mater. Chem. C 4(30), 7223–7229 (2016).
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X. Dai, Z. Zhang, Y. Jin, Y. Niu, H. Cao, X. Liang, L. Chen, J. Wang, and X. Peng, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
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K. Lu, Y. Wang, J. Yuan, Z. Cui, G. Shi, S. Shi, L. Han, S. Chen, Y. Zhang, and X. Ling, “Efficient PbS quantum dot solar cells employing a conventional structure,” J. Mater. Chem. A 5(45), 23960–23966 (2017).
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B. S. Mashford, T.-L. Nguyen, G. J. Wilson, and P. Mulvaney, “All-inorganic quantum-dot light-emitting devices formed via low-cost, wet-chemical processing,” J. Mater. Chem. 20(1), 167–172 (2010).
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Y. Yang, Z. Ying, W. Cao, A. Titov, J. Hyvonen, J. R. Manders, J. Xue, P. H. Holloway, and Q. Lei, “High-efficiency light-emitting devices based on quantum dots with tailored nanostructures,” Nat. Photonics 9(4), 259–266 (2015).
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H. Shen, W. Cao, N. T. Shewmon, C. Yang, L. S. Li, and J. Xue, “High-efficiency, low turn-on voltage blue-violet quantum-dot-based light-emitting diodes,” Nano Lett. 15(2), 1211–1216 (2015).
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L. Qian, Y. Zheng, J. Xue, and P. H. Holloway, “Stable and efficient quantum-dot light-emitting diodes based on solution-processed multilayer structures,” Nat. Photonics 5(9), 543–548 (2011).
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L. Bai, X. Yang, C. Y. Ang, K. T. Nguyen, T. Ding, P. Bose, Q. Gao, A. K. Mandal, X. W. Sun, and H. V. Demir, “A quinoxaline based N-heteroacene interfacial layer for efficient hole-injection in quantum dot light-emitting diodes,” Nanoscale 7(27), 11531–11535 (2015).
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K. Lu, Y. Wang, J. Yuan, Z. Cui, G. Shi, S. Shi, L. Han, S. Chen, Y. Zhang, and X. Ling, “Efficient PbS quantum dot solar cells employing a conventional structure,” J. Mater. Chem. A 5(45), 23960–23966 (2017).
[Crossref]

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D. Xingliang, Z. Zhenxing, J. Yizheng, N. Yuan, C. Hujia, L. Xiaoyong, C. Liwei, W. Jianpu, and P. Xiaogang, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
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Zhang, F.

Q. Lin, B. Song, H. Z. Wang, F. Zhang, F. Chen, L. Wang, F. Guo, L. S. Li, and H. Shen, “High-Efficiency Deep-Red Quantum-Dot Light-Emitting Diodes with Type-II CdSe/CdTe Core/Shell Quantum Dots as Emissive Layers,” J. Mater. Chem. C 4(30), 7223–7229 (2016).
[Crossref]

Zhang, Q.

Zhang, Y.

K. Lu, Y. Wang, J. Yuan, Z. Cui, G. Shi, S. Shi, L. Han, S. Chen, Y. Zhang, and X. Ling, “Efficient PbS quantum dot solar cells employing a conventional structure,” J. Mater. Chem. A 5(45), 23960–23966 (2017).
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Zhang, Z.

W. Lin, Y. Niu, R. Meng, L. Huang, H. Cao, Z. Zhang, H. Qin, and X. Peng, “Shell-thickness dependent optical properties of CdSe/CdS core/shell nanocrystals coated with thiol ligands,” Nano Res. 9(1), 260–271 (2016).
[Crossref]

X. Dai, Z. Zhang, Y. Jin, Y. Niu, H. Cao, X. Liang, L. Chen, J. Wang, and X. Peng, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
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Zheng, Y.

L. Qian, Y. Zheng, J. Xue, and P. H. Holloway, “Stable and efficient quantum-dot light-emitting diodes based on solution-processed multilayer structures,” Nat. Photonics 5(9), 543–548 (2011).
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Zhenxing, Z.

D. Xingliang, Z. Zhenxing, J. Yizheng, N. Yuan, C. Hujia, L. Xiaoyong, C. Liwei, W. Jianpu, and P. Xiaogang, “Solution-processed, high-performance light-emitting diodes based on quantum dots,” Nature 515(7525), 96–99 (2014).
[Crossref]

Zhou, Z.

B. S. Mashford, M. Stevenson, Z. Popovic, C. Hamilton, Z. Zhou, C. Breen, J. Steckel, V. Bulovic, M. Bawendi, and S. Coesullivan, “High-efficiency quantum-dot light-emitting devices with enhanced charge injection,” Nat. Photonics 7(5), 407–412 (2013).
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ACS Nano (1)

B. G. Jeong, Y.-S. Park, J. H. Chang, I. Cho, J. K. Kim, H. Kim, K. Char, J. Cho, V. I. Klimov, P. Park, D. C. Lee, and W. K. Bae, “Colloidal Spherical Quantum Wells with Near-Unity Photoluminescence Quantum Yield and Suppressed Blinking,” ACS Nano 10(10), 9297–9305 (2016).
[Crossref]

Adv. Mater. (2)

J. Lim, B. G. Jeong, M. Park, J. K. Kim, J. M. Pietryga, Y.-S. Park, V. I. Klimov, C. Lee, D. C. Lee, and W. K. Bae, “Influence of Shell Thickness on the Performance of Light-Emitting Devices Based on CdSe/Zn1-XCdXS Core/Shell Heterostructured Quantum Dots,” Adv. Mater. 26(47), 8034–8040 (2014).
[Crossref]

F. So and D. Kondakov, “Degradation mechanisms in small-molecule and polymer organic light-emitting diodes,” Adv. Mater. 22(34), 3762–3777 (2010).
[Crossref]

J. Mater. Chem. (1)

B. S. Mashford, T.-L. Nguyen, G. J. Wilson, and P. Mulvaney, “All-inorganic quantum-dot light-emitting devices formed via low-cost, wet-chemical processing,” J. Mater. Chem. 20(1), 167–172 (2010).
[Crossref]

J. Mater. Chem. A (1)

K. Lu, Y. Wang, J. Yuan, Z. Cui, G. Shi, S. Shi, L. Han, S. Chen, Y. Zhang, and X. Ling, “Efficient PbS quantum dot solar cells employing a conventional structure,” J. Mater. Chem. A 5(45), 23960–23966 (2017).
[Crossref]

J. Mater. Chem. C (1)

Q. Lin, B. Song, H. Z. Wang, F. Zhang, F. Chen, L. Wang, F. Guo, L. S. Li, and H. Shen, “High-Efficiency Deep-Red Quantum-Dot Light-Emitting Diodes with Type-II CdSe/CdTe Core/Shell Quantum Dots as Emissive Layers,” J. Mater. Chem. C 4(30), 7223–7229 (2016).
[Crossref]

J. Phys. Chem. C (1)

P. Maity, T. Debnath, and H. N. Ghosh, “Ultrafast Charge Carrier Delocalization in CdSe/CdS Quasi Type II and CdS/CdSe Inverted Type I Core/Shell: A Structural Analysis through Carrier Quenching Study,” J. Phys. Chem. C 119(46), 26202–26211 (2015).
[Crossref]

Nano Lett. (5)

V. Wood, M. J. Panzer, J.-M. Caruge, J. E. Halpert, M. G. Bawendi, and V. Bulovic, “Air-stable operation of transparent, colloidal quantum dot based LEDs with a unipolar device architecture,” Nano Lett. 10(1), 24–29 (2010).
[Crossref]

A. Piryatinski, S. A. Ivanov, S. Tretiak, and V. I. Klimov, “Effect of quantum and dielectric confinement on the exciton− exciton interaction energy in type II core/shell semiconductor nanocrystals,” Nano Lett. 7(1), 108–115 (2007).
[Crossref]

B. N. Pal, Y. Ghosh, S. Brovelli, R. Laocharoensuk, V. I. Klimov, J. A. Hollingsworth, and H. Htoon, “‘Giant’ CdSe/CdS core/shell nanocrystal quantum dots as efficient electroluminescent materials: strong influence of shell thickness on light-emitting diode performance,” Nano Lett. 12(1), 331–336 (2012).
[Crossref]

H. Shen, W. Cao, N. T. Shewmon, C. Yang, L. S. Li, and J. Xue, “High-efficiency, low turn-on voltage blue-violet quantum-dot-based light-emitting diodes,” Nano Lett. 15(2), 1211–1216 (2015).
[Crossref]

C. Lee, J. Lim, and K. B. Wan, “Efficient full-color colloidal quantum dot light-emitting diodes using an inverted device structure,” Nano Lett. 12(5), 2362–2366 (2012).
[Crossref]

Nano Res. (2)

W. Lin, Y. Niu, R. Meng, L. Huang, H. Cao, Z. Zhang, H. Qin, and X. Peng, “Shell-thickness dependent optical properties of CdSe/CdS core/shell nanocrystals coated with thiol ligands,” Nano Res. 9(1), 260–271 (2016).
[Crossref]

Y. Niu, C. Pu, R. Lai, R. Meng, W. Lin, H. Qin, and X. Peng, “One-pot/three-step synthesis of zinc-blende CdSe/CdS core/shell nanocrystals with thick shells,” Nano Res. 10(4), 1149–1162 (2017).
[Crossref]

Nanoscale (1)

L. Bai, X. Yang, C. Y. Ang, K. T. Nguyen, T. Ding, P. Bose, Q. Gao, A. K. Mandal, X. W. Sun, and H. V. Demir, “A quinoxaline based N-heteroacene interfacial layer for efficient hole-injection in quantum dot light-emitting diodes,” Nanoscale 7(27), 11531–11535 (2015).
[Crossref]

Nat. Commun. (1)

K. B. Wan, Y. S. Park, J. Lim, D. Lee, L. A. Padilha, H. Mcdaniel, I. Robel, C. Lee, J. M. Pietryga, and V. I. Klimov, “Controlling the influence of Auger recombination on the performance of quantum-dot light-emitting diodes,” Nat. Commun. 4(1), 2661 (2013).
[Crossref]

Nat. Photonics (5)

Y. Yang, Z. Ying, W. Cao, A. Titov, J. Hyvonen, J. R. Manders, J. Xue, P. H. Holloway, and Q. Lei, “High-efficiency light-emitting devices based on quantum dots with tailored nanostructures,” Nat. Photonics 9(4), 259–266 (2015).
[Crossref]

L. Qian, Y. Zheng, J. Xue, and P. H. Holloway, “Stable and efficient quantum-dot light-emitting diodes based on solution-processed multilayer structures,” Nat. Photonics 5(9), 543–548 (2011).
[Crossref]

B. S. Mashford, M. Stevenson, Z. Popovic, C. Hamilton, Z. Zhou, C. Breen, J. Steckel, V. Bulovic, M. Bawendi, and S. Coesullivan, “High-efficiency quantum-dot light-emitting devices with enhanced charge injection,” Nat. Photonics 7(5), 407–412 (2013).
[Crossref]

J. M. Caruge, J. E. Halpert, V. Wood, V. Bulovi, and M. G. Bawendi, “Colloidal quantum-dot light-emitting diodes with metal-oxide charge transport layers,” Nat. Photonics 2(4), 247–250 (2008).
[Crossref]

K. S. Cho, E. K. Lee, W. J. Joo, E. Jang, T. H. Kim, J. L. Sang, S. J. Kwon, J. Y. Han, B. K. Kim, and B. L. Choi, “High-performance crosslinked colloidal quantum-dot light-emitting diodes,” Nat. Photonics 3(6), 341–345 (2009).
[Crossref]

Nature (3)

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Figures (6)

Fig. 1.
Fig. 1. Structure and optical characteristics of Cd0.1Zn0.9S/CdSe/CdS NCs. (a) Schematic illustration and (b) Absorption and PL spectra. (c) and (d) TEM image and XRD of Cd0.1Zn0.9S, Cd0.1Zn0.9S/CdSe and Cd0.1Zn0.9S/CdSe/CdS NCs.
Fig. 2.
Fig. 2. Comparative analysis of the current density versus driving voltage of the electron-only (a) and hole-only (b) devices based on Cd0.1Zn0.9S/CdSe580 and Cd0.1Zn0.9S/CdSe580/CdS 1–3.
Fig. 3.
Fig. 3. PL decay dynamics of Cd0.1Zn0.9S/CdSe/CdS (a), CdSe/CdS (b) and Cd0.1Zn0.9S/CdSe (c) QDs as a film on a glass substrate (black), as a film of QDs/ZnO (red). (d) Comparative analysis of the current density versus driving voltage of the electron-only and hole-only devices based on these three QDs.
Fig. 4.
Fig. 4. Device structure and cross-section scanning electron microscopy (SEM) image.
Fig. 5.
Fig. 5. PL and EL spectra of the Cd0.1Zn0.9S/CdSe/CdS (a), Cd0.1Zn0.9S/CdSe (b) and CdSe/CdS (c) based LED; Evolution of EL spectra with driving voltages of the Cd0.1Zn0.9S/CdSe/CdS (d), Cd0.1Zn0.9S/CdSe (e) and CdSe/CdS (f) based devices.
Fig. 6.
Fig. 6. Current density, luminance (a) of the Cd0.1Zn0.9S/CdSe/CdS CdSe/CdS and Cd0.1Zn0.9S/CdSe based devices; Current efficiency and EQEs (b) of these three devices.

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