Investigation of upconversion luminescence for Tb3+/Yb3+ co-doped CaLnAlO4 (Ln = Y, Gd, La) phosphors

被引：9
作者：
Shen, Bingqing [1 ]
Zhang, Yuanpeng [2 ]
Zhang, Yuepin [1 ]
Hu, Jianxu [1 ]
机构：
[1] Ningbo Univ, Key Lab Photoelect Mat, Ningbo 315211, Zhejiang, Peoples R China
[2] Oak Ridge Natl Lab, 1 Bethel Valley Rd, Oak Ridge, TN 37830 USA
来源：
JOURNAL OF LUMINESCENCE | 2020年 / 223卷
关键词：
Upconversion; Cooperative energy transfer; Partial substitution; Phosphors; COOPERATIVE ENERGY-TRANSFER; YB3+; NANOCRYSTALS; EMISSION; TB3+; BAND; LANTHANIDE; EFFICIENT; GLASS;
D O I：
10.1016/j.jlumin.2020.117266
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Tb3+/Yb3+ co-doped CaGdAlO4 phosphors were synthesized by a conventional solid-state reaction method. Green UC emission was obtained from the prepared samples under 980 nm excitation via a cooperative energy transfer process. The cooperative energy transfer efficiency from Yb3+ to Tb3+ and the phonon-assisted energy transfer efficiency from Tb3+ to Yb3+ were evaluated to be similar to 40% and similar to 1%, respectively. Partial substitution of Gd3+ ions with Y3+ or La3+ ions leads to an increase of UC intensity due to the enhancement of local distortion. The results indicate that the synthesized phosphors may be used to increase the efficiency of perovskite-based photovoltaic cells excited by green light.
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页数：8
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