Efficient spectral regulation in e:[Lu.sub.3][.sub.5][O.sub.12]/Ce:[Y.sub.3][Al.sub.5][O.sub.12] transparent ceramics with high color rendering index for high-power white LEDs/LDs

Realizing a high color rendering index (CRI) in Ce:LuAG transparent ceramics (TCs) with desired thermal stability is essential to their applications in white LEDs/LDs as color converters. In this study, based on the scheme of configuring the red component by [Cr.sup.3+] doping, an efficient spectral...

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Published in:Journal of advanced ceramics 2021-10, Vol.10 (5), p.1107
Main Authors: Zhou, Tianyuan, Hou, Chen, Zhang, Le, Ma, Yuelong, Kang, Jian, Li, Tao, Wang, Rui, Huang, Jin, Li, Junwei, Ren, Haidong, Fu, Zhenxiao, Selim, Farida A, Li, Ming, Chen, Hao
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container_title Journal of advanced ceramics
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creator Zhou, Tianyuan
Hou, Chen
Zhang, Le
Ma, Yuelong
Kang, Jian
Li, Tao
Wang, Rui
Huang, Jin
Li, Junwei
Ren, Haidong
Fu, Zhenxiao
Selim, Farida A
Li, Ming
Chen, Hao
description Realizing a high color rendering index (CRI) in Ce:LuAG transparent ceramics (TCs) with desired thermal stability is essential to their applications in white LEDs/LDs as color converters. In this study, based on the scheme of configuring the red component by [Cr.sup.3+] doping, an efficient spectral regulation was realized in Ce,Cr:LuAG TCs. A unilateral shift phenomenon could be observed in both photoluminescence (PL) and photoluminescence excitation (PLE) spectra of TCs. By constructing TC-based white LED/LD devices in a remote excitation mode, luminescence properties of Ce,Cr:LuAG TCs were systematically investigated. The CRI values of Ce:LuAG TC based white LEDs could be increased by a magnitude of 46.2%. Particularly, by combining the as fabricated Ce,Cr:LuAG TCs with a 0.5 at% Ce:YAG TC, surprising CRI values of 88 and 85.5 were obtained in TC based white LEDs and LDs, respectively. Therefore, Ce,Cr:LuAG TC is a highly promising color convertor for high-power white LEDs/LDs applied in general lighting and displaying. Keywords: Ce,Cr:LuAG TC; spectral regulation; energy transfer; color rendering index (CRI); white LEDs/LDs
doi_str_mv 10.1007/s40145-021-0496-8
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In this study, based on the scheme of configuring the red component by [Cr.sup.3+] doping, an efficient spectral regulation was realized in Ce,Cr:LuAG TCs. A unilateral shift phenomenon could be observed in both photoluminescence (PL) and photoluminescence excitation (PLE) spectra of TCs. By constructing TC-based white LED/LD devices in a remote excitation mode, luminescence properties of Ce,Cr:LuAG TCs were systematically investigated. The CRI values of Ce:LuAG TC based white LEDs could be increased by a magnitude of 46.2%. Particularly, by combining the as fabricated Ce,Cr:LuAG TCs with a 0.5 at% Ce:YAG TC, surprising CRI values of 88 and 85.5 were obtained in TC based white LEDs and LDs, respectively. Therefore, Ce,Cr:LuAG TC is a highly promising color convertor for high-power white LEDs/LDs applied in general lighting and displaying. 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subjects Ceramic materials
Ceramics
Laws, regulations and rules
Light-emitting diodes
title Efficient spectral regulation in e:[Lu.sub.3][.sub.5][O.sub.12]/Ce:[Y.sub.3][Al.sub.5][O.sub.12] transparent ceramics with high color rendering index for high-power white LEDs/LDs
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