文献类型：期刊文献

英文题名：CsPbIBr2 Thick Film With (100)-Preferred Orientation Enables Highly Sensitive X-Ray Detector by a Spray-Coating Method via Dual-Additive-Assisted Solution Strategy under Atmospheric Environment

作者：Lu, Yingshen[1]; He, Danmin[1]; Yuan, Xiang[1]; Yan, Quanhe[1]; Shu, Xin[1]; Hu, Ziting[1]; Zhang, Zifa[1]; Liu, Zhuoyan[1]; Jiang, Zuimin[2]; Xu, Run[3]; Wang, Wenzhen[3]; Ma, Zhongquan[1]; Chen, Teng[4]; Xu, Haitao[5]; Xu, Fei[1,2]; Hong, Feng[1]; Song, Hongwei[1]

机构：[1] SHU-SolarE R&D Lab, Department of Physics, College of Sciences, Shanghai Key Laboratory of High-Temperature Superconductors, Institute for Sustainable Energy, Shanghai University, Shanghai, 200444, China; [2] State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai, 200433, China; [3] School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; [4] Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai, 200444, China; [5] Department of Physics, Shaoxing University, Shaoxing, 312000, China

年份：2024

外文期刊名：Advanced Functional Materials

收录：EI(收录号：20244617356645)

语种：英文

外文关键词：Gold coatings - Remote sensing - Surface discharges - Thick films - X ray films

外文摘要：The realization of large-area high-quality perovskite thick films under an atmospheric environment without humidity control is confronting an urgent challenge for the applications in X-ray detection and imaging. A spray-coating method with air as the gas carrier is employed to achieve large-area perovskite thick films for X-ray flat-panel detection applications. To further improve the quality of the thick films, the 10?μm-thick CsPbIBr2 films with (100)-preferred orientation, low trap density (7.1?×?1012?cm?3) and high resistivity corresponding to low dark current (3.2?×?10?9?A) are prepared via dual-additive-assisted (NH4SCN and L-α-phosphatidylcholine (LP)) solution strategy under atmospheric environment with relative humidity of 60% (60% RH). Thus, the metal-semiconductor-metal-structured (Au/CsPbIBr2/Au) transverse X-ray detection device under 40?KeV X-ray irradiation possesses a high sensitivity up to 1420?μC Gyair?1?cm?2 under a weak electric field of 18?V?mm?1 and a low dose rate of 3.3?μGyair?s?1 that is lower than a dose rate of ≈5.5?μGyair?s?1 required for routine medical diagnosis. Strikingly, the unencapsulated device maintains 80% (1120?μC Gyair?1?cm?2) of the original sensitivity after 1000?h under the atmospheric environment with 45–55% RH. These results pave the way for the practical applications of perovskite thick films in X-ray medical detection and imaging. ? 2024 Wiley-VCH GmbH.