Fully Inorganic Metal Halide Perovskite CsGeBr3 Photoferroelectrics for Room-Temperature Photovoltaic Self-Powered Ammonia Detection

IF 8.2 1区化学 Q1 CHEMISTRY, ANALYTICAL

ACS Sensors Pub Date : 2025-03-19 DOI:10.1021/acssensors.4c03355

Xirui Yan, Haiming Zhang

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Abstract

Chemiresistive sensing technology plays a significant role in the field of gas monitoring. However, conventional metal oxide gas monitoring devices typically require high operating temperatures and external power supplies to power them. In this paper, we have exploited the property that the photoferroelectric material CsGeBr₃ can provide a stable output source through a self-polarization field under light illumination to achieve a good self-powered gas sensing response to NH₃ at room temperature, including extremely fast response/recovery time (30 s/40 s), and low concentration sensing (response value of 2.02 at 50 ppm of NH₃). This demonstrates significant advantages and a wider range of application scenarios than those of conventional metal oxide gas sensors that require an external power supply. Fourier transform infrared (FTIR) spectroscopic measurements confirmed the high selectivity of CsGeBr₃ for NH₃, which to our knowledge is the first time that Ge-based all-inorganic photoferroelectric materials of perovskite have been applied to the field of self-powered gas sensing, and the present work provides a new material and direction in the study of self-powered gas sensors.

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来源期刊

ACS Sensors Chemical Engineering-Bioengineering

CiteScore

14.50

自引率

3.40%

发文量

372

期刊介绍： ACS Sensors is a peer-reviewed research journal that focuses on the dissemination of new and original knowledge in the field of sensor science, particularly those that selectively sense chemical or biological species or processes. The journal covers a broad range of topics, including but not limited to biosensors, chemical sensors, gas sensors, intracellular sensors, single molecule sensors, cell chips, and microfluidic devices. It aims to publish articles that address conceptual advances in sensing technology applicable to various types of analytes or application papers that report on the use of existing sensing concepts in new ways or for new analytes.