TY - JOUR

T1 - Multi-Stimuli-Responsive photoluminescence of cesium manganese bromide by temperature and solvent-induced structural phase transitions

AU - Kong, Qingkun

AU - Xu, Xin

AU - Wang, Zhongyi

AU - Chen, Junsheng

AU - Feng, Yuanyuan

N1 - Funding Information: This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 22072070, 22005295 , 21833009 ). Junsheng Chen acknowledges the funding support from the Novo Nordisk Foundation (Grant No. NNF22OC0073582 ). Publisher Copyright: © 2024 The Author(s)

PY - 2024

Y1 - 2024

N2 - Metal halide perovskites showing responses to external stimuli have emerged as a new class of stimulus-responsive smart materials. Specifically, their photoluminescence (PL) intensity, color and lifetime can change with different external stimuli. However, most of the existing metal halide perovskites only show PL response to a single stimulus. For encryption security applications, it is desired to have selective PL response to multiple stimuli. Herein, we developed a new type of cesium (Cs) manganese (Mn) bromide (Br) perovskite (Cs2MnBr4(H2O)2) single crystal with PL response to temperature, humidity and solvent by taking advantage of its structural phase transition, which causes its PL intensity (from non-luminescent to near unity luminescence) and color change (from green to red). Stimuli-responsive PL can be achieved by engineering the phase structure of Cs-Mn-Br perovskites from Cs2MnBr4(H2O)2 to Cs2MnBr4, Cs3MnBr5, CsMnBr3(H2O)2 and CsMnBr3 via temperature and different solvents. Such multiple stimuli responsive material is promising for multidimensional information encryption.

AB - Metal halide perovskites showing responses to external stimuli have emerged as a new class of stimulus-responsive smart materials. Specifically, their photoluminescence (PL) intensity, color and lifetime can change with different external stimuli. However, most of the existing metal halide perovskites only show PL response to a single stimulus. For encryption security applications, it is desired to have selective PL response to multiple stimuli. Herein, we developed a new type of cesium (Cs) manganese (Mn) bromide (Br) perovskite (Cs2MnBr4(H2O)2) single crystal with PL response to temperature, humidity and solvent by taking advantage of its structural phase transition, which causes its PL intensity (from non-luminescent to near unity luminescence) and color change (from green to red). Stimuli-responsive PL can be achieved by engineering the phase structure of Cs-Mn-Br perovskites from Cs2MnBr4(H2O)2 to Cs2MnBr4, Cs3MnBr5, CsMnBr3(H2O)2 and CsMnBr3 via temperature and different solvents. Such multiple stimuli responsive material is promising for multidimensional information encryption.

KW - Encryption

KW - Metal halide perovskites

KW - Sensing

KW - Thermochromism

U2 - 10.1016/j.cej.2024.149741

DO - 10.1016/j.cej.2024.149741

M3 - Journal article

AN - SCOPUS:85185558222

VL - 485

JO - Biochemical Engineering Journal

JF - Biochemical Engineering Journal

SN - 1369-703X

M1 - 149741

ER -