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

被引：54

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

页码：4950 / 4953

页数：4

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