Luminescent enhancement and multi-mode optical thermometry of erbium doped halide Cs_(2)(Na/Ag)BiCl_(6) microcrystals  

作　　者：Shuang Zhao Jinpeng Zou Hanqi Xu Qichuan Hu Qiuju Han Wenzhi Wu 

机构地区：[1]School of Electronic Engineering,Heilongjiang University,Harbin,150080,China [2]School of Arts and Sciences,Northeast Agricultural University,Harbin,150030,China

出　　处：《Journal of Rare Earths》2024年第11期2018-2026,I0001,共10页稀土学报（英文版）

基　　金：Project supported by the Heilongjiang Provincial Key Laboratory of Micro-nano Sensitive Devices and Systems;Basic Research Project for Outstanding Young Teachers of Heilongjiang Province (YQJH2023128);Cultivation Project of Double First-class Initiative Discipline by Heilongjiang Province(LJGXCG2022-061)。

摘　　要：Lanthanum-doped double halide perovskite has attracted increasing interest due to its distinctive upconversion and near-infrared(NIR) luminous characteristics.Here,erbium ion(Er^(3+)) doped Cs_(2)(Na/Ag)BiCl_(6) microcrystals(MCs) were synthesized and proved to be one of the most prospective candidates for optical thermometry.The enhancement of both white light from self-trapped exciton emission and NIR emission from Er^(3+) ion of Cs_(2)AgBiCl_(6) microcrystals is caused by lattice distortion due to Na^(+) ion doping.Fluorescence intensity ratio and lifetime methods provide self-referenced and sensitive thermometry under 405 and/or 980 nm laser excitation at the temperatures from 80 to 480 K.Besides,the maximum values of relative and absolute sensitivity of 3.62%/K and 27//K can be achieved in the low to high temperature range under 980 and 405 nm laser co-excitation.Through the experimental analysis,Er^(3+)doped Cs_(2)(Na/Ag)BiCl_(6) double perovskite is considered to be an ideal self-calibrating thermometric material due to its good long-term stability and multi-mode function of excitation and detection.

关 键 词：Double halide perovskite Rare earths Near-infrared emission Multi-mode thermometry Up-conversion luminescence 980 and 405 nm laser co-excitation 

分 类 号：TB34[一般工业技术—材料科学与工程]