Xu Xiaoli, Wang Shengyi, Chen Yan, Liu Wangwang, Wang Xiaoping, Jiang Hongtao, Ma Shuyi, Yun Pengdou
Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China.
Northwest University for Nationalities, Lanzhou, Gansu 730030, China.
ACS Appl Mater Interfaces. 2022 Aug 31;14(34):39524-39534. doi: 10.1021/acsami.2c09586. Epub 2022 Aug 17.
All-inorganic halide perovskites, as a dominant member of the perovskite family, have been proven to be excellent semiconductors due to the great successes for solar cells, light-emitting diodes, photodetectors, and nanocrystal photocatalysts. Despite the remarkable advances in those fields, there are few research studies focusing on gas and humidity-sensing performances, especially for pure CsPbBr and heterogeneous CsPbBr@MoS composites. Here, we first report a valuable CsPbBr sensor prepared by electrospinning, and the excellent gas sensing performances are investigated. The CsPbBr sensor can quickly and effectively detect ethanolamine at room temperature. The response time is only 16 s, and the response to 100 ppm ethanolamine is as high as 29.87, besides the excellent repeatability and good stability. The theoretical detection limit is estimated to be 21 ppb. Furthermore, considering the irreplaceable role of heterostructures in regulating the electronic structure and supporting rich reaction boundaries, we also actively explored the EA sensitivity of inorganic CsPbBr-based heterogeneous composites CsPbBr@MoS. At the same time, the roles of the critical capping agents OA and OAm are systematically investigated. This work demonstrates the great potential of all-inorganic halide perovskites in promising volatile organic compound detection.
全无机卤化物钙钛矿作为钙钛矿家族的主要成员，由于在太阳能电池、发光二极管、光电探测器和纳米晶体光催化剂等领域取得的巨大成功，已被证明是优异的半导体。尽管在这些领域取得了显著进展，但针对气敏和湿敏性能的研究却很少，尤其是对于纯CsPbBr和异质CsPbBr@MoS复合材料。在此，我们首次报道了一种通过静电纺丝制备的有价值的CsPbBr传感器，并对其优异的气敏性能进行了研究。CsPbBr传感器在室温下能够快速有效地检测乙醇胺。响应时间仅为16秒，对100 ppm乙醇胺的响应高达29.87，此外还具有出色的重复性和良好的稳定性。理论检测限估计为21 ppb。此外，考虑到异质结构在调节电子结构和提供丰富反应界面方面的不可替代作用，我们还积极探索了基于无机CsPbBr的异质复合材料CsPbBr@MoS对乙醇胺的传感灵敏度。同时，系统研究了关键封端剂油酸（OA）和油胺（OAm）的作用。这项工作证明了全无机卤化物钙钛矿在挥发性有机化合物检测方面的巨大潜力。
