Fabrication of CsPbBr3 films with high quality using a simple method. (29th January 2021)

• Record Type: Journal Article
• Authors: Yang, Xingming; Li, Mengmeng; Jiang, Junjie; Ma, Ligang; Tang, Wenchao; Xu, Cuiping; Cai, H L; Zhang, F M; Wu, X S
• Is Part Of: Journal of physics. Volume 54:Number 15(2021)
• Publication Date: 2021-01-29
• Subjects: inorganic perovskite CsPbBr3 -- two-step method -- antisolvent -- high temperature post-treatment; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/abd712
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: Inorganic perovskite CsPbBr3 is a material used for fabricating highly efficient and stable perovskite solar cells. In this work, a two-step infiltration-spinning method is proposed to obtain CsPbBr3 films with pure phase. Phase transformations between CsPb2 Br5, CsPbBr3 and Cs4 PbBr6 are investigated by controlling the contact time between the CsBr solution and the PbBr2 substrate. CsPbBr3 films with large grain sizes are obtained after high temperature post-treatment. The CsPbBr3 -based solar cells show a high efficiency (approximately 7%) with a short-circuit current density of 6.68 mA cm −2, an open-circuit voltage of 1.47 V and a fill factor of 70.9% under standard solar illumination.