期刊
CERAMICS INTERNATIONAL
卷 48, 期 20, 页码 29991-29996出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.06.267
关键词
Warm white LEDs; Lead-free halide perovskite phosphors; Oil bath method
资金
- National Natural Science Foundation of China [51702051and 51902054]
- Guangdong Basic and Applied Basic Research Foundation [2019B1515120008]
- Key-Area Research and Development Program of Guangdong Province [2021B0101260001]
- Foshan Inorganic Micro-Nano Luminescent Materials Engineering Technology Research Center
In this study, boron-doped lead-free double perovskite phosphors with co-doping of bismuth and gadolinium were synthesized and used to improve the luminescence effect of white LEDs. High-quality warm white LEDs were successfully prepared using the synthesized phosphor.
Bi-doped lead-free double perovskite Cs2Ag0.6Na0.4InCl6 phosphors have been proved to be effective for use in white LEDs. To further improve the luminescence effect of this promising material, Bi3+/Gd3+ co-doped lead-free perovskite Cs2Ag0.6Na0.4InCl6 phosphors were successfully synthesized using the oil bath method. The quantum efficiency of orange-emitting Cs2Ag0.6Na0.4InCl6:1% Bi3+ was effectively improved from 79.72% to 87.57% by co-doping Gd3+ ions. White LEDs were prepared by mixing the synthesized phosphor Cs2Ag0.40Na0.60InCl6: 1% Bi3+,10%Gd3+ and commercial blue phosphor BaMgAl10O17:Eu2+. Excellent warm white LEDs with colour coordinates (0.3464, 0.3224), colour rendering index of 93.9, and colour temperature of 4818 K were produced. The results of this study provide a meaningful reference for new lead-free halide perovskite luminescent material systems.
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