Cr3+-doped Bi2Ga4O9-Bi2Al4O9 solid-solution phosphors: crystal-field modulation and lifetime-based temperature sensing

被引：53
|
作者：
Chen, Daqin [1 ]
Chen, Xiao [1 ]
Li, Xiaoyue [1 ]
Guo, Hai [2 ]
Liu, Shen [1 ]
Li, Xinyue [1 ]
机构：
[1] Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China
[2] Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Peoples R China
来源：
OPTICS LETTERS | 2017年 / 42卷 / 23期
基金：
中国国家自然科学基金;
关键词：
GLASS-CERAMICS; THERMOGRAPHIC PHOSPHORS; OPTICAL THERMOMETRY; LUMINESCENCE; FIBER;
D O I：
10.1364/OL.42.004950
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Cr3+-doped Bi2Ga4O9-Bi2Al4O9 solid-solution (SS) phosphors were fabricated to explore their possible application in fluorescence lifetime-based temperature sensing. The present samples exhibited E-2 -> (4)A(2) R-line emissions associated with T-4(2) -> (4)A(2) phonon sideband emissions of Cr3+ in the wavelength range of 600-850 nm upon the excitation of visible light. Through modifying the Al/Ga ratio in the SS hosts, the Cr3+ crystal field was easily tuned from intermediate to strong, being beneficial to modulate an energy gap between E-2 and T-4(2) thermally coupled emitting states. As a result, linearly temperature-sensitive fluorescence lifetime was achieved in the Cr3+-doped Bi2Ga4O9-Bi2Al4O9 SSs with a high Al/Ga ratio, enabling us to conveniently and accurately determine a temperature with a high relative sensitivity of 2.13-3.26% K-1. (C) 2017 Optical Society of America
引用
收藏
页码：4950 / 4953
页数：4
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