Improved long-term operational stability of optical humidity sensing by mixed-halide perovskite

Feng，Xu Liang1,2; Liu，Yuan Xun1,2; Huang，Zhi Hao1,2; Gu，Shui Cong1,2; Zhang，Xuan Yu3; Sun，Zi Jun2; Liang，Cheng Hua2; Chen，Hua Jin2; Li，Ru Xue1,2

10.1117/12.2661984

2023

0277-786X

1996-756X

Proceedings of SPIE - The International Society for Optical Engineering

12565

Halide perovskite (ABX3) have demonstrated great advantages over conventional semiconductors for the next-generation photoelectronic devices due to their outstanding photophysical properties, such as tunable band gaps, long carrier diffusion length, long carrier lifetime, and high quantum efficiency. In addition, it is also very suitable for humidity sensing because of its environmental sensitivity. However, halogen elements have a great impact on the photophysical properties of perovskite because of their different exchange properties with the environment and mobility. In this work, the samples with three different anions of CsPbCl3, CsPbBr3, and CsPb(Br0.5Cl0.5)3 were used, and humidity sensing and stability experiments were carried out in a humidity environment at a relative humidity (RH) of 30%~90%. It is found that the single-anion halide perovskite materials possess low sensitive at low humidity and possess poor stability at high humidity. While the mixed-halide perovskite CsPb(Br0.5Cl0.5)3 demonstrated better sensitivity and reversible in the range of 30%~90% RH. It shows that this is related to the shallow-level defect types of different halide anions, which lead to different phenomena. The ability of different materials to bind water molecules is also an important reason. Therefore, it indicates that the anion-mixed halide perovskite humidity sensor can be used in future environmental detection applications. has great potential.

anion exchange humidity sensing perovskite photoluminescence stability

其他

英语

EI

National Natural Science Foundation of China[11904044];Natural Science Foundation of Guangxi Province[2021JJB170012];Scientific Research Foundation of Hunan Provincial Education Department[2021KY0345];Jiangxi University of Science and Technology[21Z03];National Natural Science Foundation of China[62104052];

20232114126759

Bromine compounds ; Carrier lifetime ; Chlorine compounds ; Energy gap ; Humidity sensors ; Lead compounds ; Molecules ; Negative ions ; Perovskite

Meteorological Instrumentation:443.2 ; Minerals:482.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Atomic and Molecular Physics:931.3

2-s2.0-85159705876

Scopus

1.School of Automation,Guangxi University of Science and Technology,Liuzhou,Gaungxi,545616,China
2.School of Electronic Engineering,University of Science and Technology,Liuzhou,Gaungxi,545006,China
3.Department of Electronic and Electrical Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Feng，Xu Liang,Liu，Yuan Xun,Huang，Zhi Hao,et al. Improved long-term operational stability of optical humidity sensing by mixed-halide perovskite[C],2023.