材料科学
光致发光
纳米晶
成核
卤化物
发光
激发
锰
光电子学
纳米技术
无机化学
化学
电气工程
工程类
有机化学
冶金
作者
Ying Ye,Kai Li,Lingfeng Niu,Jing Ren,Chao Liu
标识
DOI:10.1002/adom.202301886
摘要
Abstract Mn 2+ ‐activated metal halides are widely reported in multi‐functional optoelectronic applications. However, Mn 2+ ‐related optical thermometry is seldom discussed. In this work, all‐inorganic Cs 3 CdBr 5 nanocrystals (NCs) are precipitated in glass. Incorporation of Mn 2+ acts as a nucleation agent to promote the growth and improve the optical properties of Cs 3 CdBr 5 NCs embedded in glass with a photoluminescence quantum yield of 66%. It is found that [ MnBr 4 ]‐[ MnBr 4 ] structural units are strongly coupled in Cs 3 Cd 1‐x Mn x Br 5 NCs, leading to efficient energy transfer from a single [ MnBr 4 ] unit to [ MnBr 4 ]‐[ MnBr 4 ] couples and subsequent green‐red dual‐band emission with the same excitation spectra. The temperature‐dependence of green emission from the [ MnBr 4 ] unit and red emission from the [ MnBr 4 ]‐[ MnBr 4 ] couples results in high S a (0.0241 K −1 at 168 K) and S r (3.0346% K −1 at 74 K) from Cs 3 Cd 1‐x Mn x Br 5 NCs embedded in glasses. These results pave the way for novel Mn 2+ ‐activated metal halide NCs for high‐sensitive temperature sensors.
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