Light-activated inorganic CsPbBr2I perovskite for room-temperature self-powered chemical sensing

被引：31

作者：

Chen, Hongjun ^{[1
]}

Zhang, Meng ^{[2
]}

Fu, Xiao ^{[3
]}

Fusco, Zelio ^{[1
]}

Bo, Renheng ^{[1
]}

Xing, Bobo ^{[1
]}

Hieu T Nguyen ^{[3
]}

Barugkin, Chog ^{[3
]}

Zheng, Jianghui ^{[2
]}

Lau, Cho Fai Jonathan ^{[2
]}

Huang, Shujuan ^{[2
]}

Ho-Baillie, Anita W. Y. ^{[2
]}

Catchpole, Kylie R. ^{[3
]}

Tricoli, Antonio ^{[1
]}

机构：

[1] Australian Natl Univ, Coll Engn & Comp Sci, Res Sch Elect Energy & Mat Engn, Nanotechnol Res Lab, Canberra, ACT 2601, Australia

[2] Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Australian Ctr Adv Photovolta, Sydney, NSW 2052, Australia

[3] Australian Natl Univ, Coll Engn & Comp Sci, Res Sch Elect Energy & Mat Engn, Canberra, ACT 2601, Australia

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2019年 / 21卷 / 43期

基金：

澳大利亚研究理事会;

关键词：

HALIDE PEROVSKITES; SOLAR-CELLS; TRAP STATES; BREATH; PHOTOLUMINESCENCE; PERFORMANCE; SENSORS; ENHANCEMENT; PASSIVATION; FILMS;

D O I：

10.1039/c9cp03059j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Halide perovskite materials are excellent light harvesters that have generated enormous interest for photovoltaic technology and an increasing number of other optoelectronic applications. Very recently, their use for miniaturized chemical sensors has shown a promising room-temperature response. Here, we present some insights on the use of CsPbBr2I (CPBI) perovskites for self-powered room-temperature sensing of several environmentally and medically relevant compounds demonstrating rapid detection of down to concentrations of 1 ppm. Notably, the photocurrent of these self-powered CPBI-based devices increases under exposure to both reducing (e.g. acetone, propane) and oxidizing (e.g. NO2, O-2) gas molecules and decreases rapidly upon reverting to an inert atmosphere. In situ photoluminescence (PL) analysis of the CPBI during exposure to oxidizing molecules reveals a strongly increased PL intensity and longer lifetime indicating a prevalent role of CPBI trap states in the sensing mechanism. These findings provide new insights for the engineering of perovskite-based materials for their future chemical sensing applications.

引用

页码：24187 / 24193

页数：7

共 53 条

[1]

Anton A., 2014, J BREATH RES, V8, P016003

[2] Impact of iodide substitution on the physical properties and stability of cesium lead halide perovskite thin films CsPbBr3-xIx (0 ≤ x ≤ 1) [J].