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Superior Self‐Powered Room‐Temperature Chemical Sensing with Light‐Activated Inorganic Halides Perovskites |
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| Authors: | Hongjun Chen Meng Zhang Renheng Bo Chog Barugkin Jianghui Zheng Qingshan Ma Shujuan Huang Anita W Y Ho‐Baillie Kylie R Catchpole Antonio Tricoli |
| Affiliation: | 1. Nanotechnology Research Laboratory, Research School of Engineering, Australian National University, Canberra, Australia;2. Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, Australia;3. Research School of Engineering, Australian National University, Canberra, Australia |
| Abstract: | Hybrid halide perovskite is one of the promising light absorber and is intensively investigated for many optoelectronic applications. Here, the first prototype of a self‐powered inorganic halides perovskite for chemical gas sensing at room temperature under visible‐light irradiation is presented. These devices consist of porous network of CsPbBr3 (CPB) and can generate an open‐circuit voltage of 0.87 V under visible‐light irradiation, which can be used to detect various concentrations of O2 and parts per million concentrations of medically relevant volatile organic compounds such as acetone and ethanol with very quick response and recovery time. It is observed that O2 gas can passivate the surface trap sites in CPB and the ambipolar charge transport in the perovskite layer results in a distinct sensing mechanism compared with established semiconductors with symmetric electrical response to both oxidizing and reducing gases. The platform of CPB‐based gas sensor provides new insights for the emerging area of wearable sensors for personalized and preventive medicine. |
| Keywords: | chemical gas sensors inorganic halides perovskites room temperature self‐powered visible light |