Zhou Kechen, Tang Lu, Zhu Chaoqi, Tang Jiahong, Su Huiyu, Luo Lingfei, Chen Liyan, Zeng Dawen
State Key Laboratory of Materials Processing and Die Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), No. 1037, Luoyu Road, Wuhan 430074, P. R. China.
ACS Sens. 2024 Sep 27;9(9):4425-4449. doi: 10.1021/acssensors.4c01199. Epub 2024 Aug 26.
Metal halide perovskites (MHPs) are emerging gas-sensing materials and have attracted considerable attention in gas sensors due to their unique bandgap structure and tunable optoelectronic properties. The past decade has witnessed significant developments in the gas-sensing field; however, their intrinsic structural instability and ambiguous gas-sensing mechanisms hamper their practical applications. Herein, we summarize the recent advances in MHP-based gas sensors. The physicochemical properties of MHPs are discussed at first. The structure design, including dimension design and engineering design, is overviewed as well as their fabrication methods, and we put forward our insights into the gas-sensing mechanism of MHPs. It is believed that enhanced understanding of gas-sensing mechanisms of MHPs are helpful for their application as gas-sensing materials, and structure design can enhance their stability, sensing sensitivity, and selectivity to target gases as gas sensors. Subsequently, the latest developments in MHP-based gas sensors are summarized according to their different application scenarios. Finally, we conclude with the current status and challenges in this field and propose future perspectives.
金属卤化物钙钛矿（MHPs）是新兴的气敏材料，由于其独特的带隙结构和可调节的光电特性，在气体传感器领域引起了广泛关注。过去十年见证了气敏领域的重大进展；然而，它们固有的结构不稳定性和模糊的气敏机制阻碍了其实际应用。在此，我们总结了基于MHP的气体传感器的最新进展。首先讨论了MHPs的物理化学性质。概述了包括尺寸设计和工程设计在内的结构设计及其制备方法，并对MHPs的气敏机制提出了我们的见解。相信对MHPs气敏机制的深入理解有助于其作为气敏材料的应用，并且结构设计可以提高其稳定性、传感灵敏度以及作为气体传感器对目标气体的选择性。随后，根据基于MHP的气体传感器的不同应用场景总结了其最新进展。最后，我们总结了该领域的现状和挑战，并提出了未来展望。
