Open AccessConstructing ultra-sensitive dual-mode optical thermometers: Utilizing FIR of Mn4+/Eu3+ and lifetime of Mn4+ based on double perovskite tellurite phosphor
Author(s) -
Li Li,
Ганг Тиан,
Yongsen Deng,
Yongjie Wang,
Zhongmin Cao,
Faling Ling,
Yanhong Li,
Sha Jiang,
Guotao Xiang,
Xianju Zhou
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.409242
Subject(s) - phosphor , thermometer , materials science , analytical chemistry (journal) , quenching (fluorescence) , emission spectrum , dual mode , fluorescence , optics , optoelectronics , spectral line , chemistry , physics , engineering , chromatography , quantum mechanics , astronomy , aerospace engineering
A strategy of optical temperature sensing was developed by using various thermal quenching of Mn 4+ and Eu 3+ for double perovskite tellurite phosphor in optical thermometers. Herein, SrGdLiTeO 6 (SGLT): Mn 4+ ,Eu 3+ phosphors were synthesized by a high-temperature solid-state reaction method. The temperature-dependent emission spectra indicated that two distinguishable emission peaks originated from Eu 3+ and Mn 4+ exhibited signicantly diverse temperature responses. Therefore, optical thermometers with a dual-mode mechanism were designed by employing a fluorescence intensity ratio (FIR) of Mn 4+ ( 2 E g → 4 A 2g ) and Eu 3+ ( 5 D 0 → 7 F 1,2 ) and the decay lifetime of Mn 4+ as the temperature readouts. The temperature sensing of the phosphors ranging from 300 to 550 K were studied. The maximum relative sensitivities (S r ) are obtained as 4.9% K -1 at 550 K. Meanwhile, the 695 nm emission of Mn 4+ possessed a temperature-dependent decay lifetime with S r of 0.229% K -1 at 573 K. Relevant results demonstrate the SrGdLiTeO 6 :Mn 4+ , Eu 3+ phosphor as an optical thermometer candidate and also provide constructive suggestions and guidance for constructing high-sensitivity dual-mode optical thermometers.