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

IF 9.1 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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用于室温光电自供电氨检测的全无机金属卤化物钙钛矿CsGeBr3光铁电体

化学电阻传感技术在气体监测领域占有重要地位。然而，传统的金属氧化物气体监测设备通常需要高工作温度和外部电源供电。本文利用光铁电材料CsGeBr3在光照下通过自极化场提供稳定输出源的特性，实现了常温下对NH3良好的自供电气敏响应，包括极快的响应/恢复时间（30 s/40 s）和极低的浓度传感（NH3浓度为50 ppm时响应值为2.02）。与需要外部电源的传统金属氧化物气体传感器相比，这显示了显著的优势和更广泛的应用场景。傅里叶变换红外（FTIR）光谱测量证实了CsGeBr3对NH3的高选择性，据我们所知，这是ge基钙钛矿全无机光铁电材料首次应用于自供电气敏领域，为自供电气敏研究提供了新的材料和方向。

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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.