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]Shanghai Univ, Dept Phys, SHU SolarE R&D Lab, Shanghai Key Lab High Temp Supercond,Coll Sci,Inst, Shanghai 200444, Peoples R China;[2]Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China;[3]Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China;[4]Shanghai Univ, Shanghai Key Lab Mech Energy Engn, Shanghai Inst Appl Math & Mech, Sch Mech & Engn Sci, Shanghai 200444, Peoples R China;[5]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2024

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：SCI-EXPANDED(收录号：WOS:001354200400001)、、Scopus(收录号：2-s2.0-85208552668)、WOS

基金：The authors acknowledge the support from the National Natural Science Foundation of China (Grant nos. 62350054, 12175131, 12374379). This work was supported by the Shanghai Technical Service Center of Science and Engineering Computing, Shanghai University.

语种：英文

外文关键词：all-inorganic perovskite thick film; atmospheric environment; dual-additive-assisted solution strategy; spray-coating method; X-ray detector

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 mu m-thick CsPbIBr2 films with (100)-preferred orientation, low trap density (7.1 x 1012 cm-3) and high resistivity corresponding to low dark current (3.2 x 10-9 A) are prepared via dual-additive-assisted (NH4SCN and L-alpha-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 mu C Gyair-1 cm-2 under a weak electric field of 18 V mm-1 and a low dose rate of 3.3 mu Gyair s-1 that is lower than a dose rate of approximate to 5.5 mu Gyair s-1 required for routine medical diagnosis. Strikingly, the unencapsulated device maintains 80% (1120 mu C 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.