Abstract

The use of thermographic phosphors for high-temperature ($>1000\mathrm{K}$) thermometry currently is limited by loss of signal due to thermal quenching. This work demonstrates a new phosphor generated by substituting tetrahedral site ${\mathrm{Al}}^{3+}\text{-}{\mathrm{O}}^{2-}$ in YAG:Dy with ${\mathrm{B}}^{3+}\text{-}{\mathrm{N}}^{3-}$ to produce YABNG:Dy. Conventional YAG:Dy and YABNG:Dy phosphors were synthesized using identical solgel synthesis techniques. X-ray diffraction measurements showed that both had nearly pure crystalline phases, with a minor secondary yttrium-aluminum-monoclinic (YAM) phase present in the YABNG:Dy. The YABNG:Dy sample had a larger and more spherical primary grain than did the YAG:Dy in scanning electron microscopy images. Tests of the thermal response showed that the YABNG:Dy had much stronger phosphorescence emissions than did YAG:Dy, likely due to the morphological differences. Furthermore, the onset of thermal quenching was delayed by approximately 100 K for YABGN:Dy compared to YAG:Dy, and the rate of signal decrease with temperature was reduced. This resulted in greater signal-to-noise ratios and less uncertainty in the temperature measurements, particularly at high temperatures.

© 2014 Optical Society of America

Energy transfer in Eu³⁺ doped scheelites: use as thermographic phosphor

Katrien W. Meert, Vladimir A. Morozov, Artem M. Abakumov, Joke Hadermann, Dirk Poelman, and Philippe F. Smet
Opt. Express 22(S3) A961-A972 (2014)

Luminescence properties of YAG:Ce, Gd phosphors synthesized under vacuum condition and their white LED performances

Hongling Shi, Chen Zhu, Jiquan Huang, Jian Chen, Dongchuan Chen, Wenchao Wang, Fangyu Wang, Yongge Cao, and Xuanyi Yuan
Opt. Mater. Express 4(4) 649-655 (2014)

Energy transfer and color-tunable luminescence properties of YVO₄:RE (RE = Eu³⁺, Sm³⁺, Dy³⁺, Tm³⁺) phosphors via molten salt synthesis

Rong Liu, Lijun Liu, and Yujun Liang
Opt. Mater. Express 8(6) 1686-1694 (2018)

Co-doped Y₂O₃:Tb³⁺/Tm³⁺ multicolor emitting phosphors for thermometry

Naohiro Ishiwada, Satoko Fujioka, Toshihisa Ueda, and Takeshi Yokomori
Opt. Lett. 36(5) 760-762 (2011)

Characterization of high-temperature thermographic phosphors: spectral properties of LuPO₄:Dy(1%),Eu(2%)

S. W. Allison, L. A. Boatner, and G. T. Gillies
Appl. Opt. 34(25) 5624-5627 (1995)