Obtaining white perovskite film for efficient solar cells. (29th June 2018)

• Record Type: Journal Article
• Authors: Niu, Qiaoli; Huang, Wentao; Lv, Hao; Hu, Yue; Zhang, Heyi; Zhang, Caixia; Ren, Shaokang; Zeng, Wenjin; Xia, Ruidong; Min, Yonggang
• Is Part Of: Journal of physics. Volume 51:Number 29(2018)
• Publication Date: 2018-06-29
• Subjects: perovskite solar cell -- anti-solvent washing -- dripping speed -- intermediate phase; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/aacc8d
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: White methylammonium lead triiodide perovskite CH3 NH3 PbI3 (MAPbI3 ) film was achieved by controlling the process of anti-solvent washing during the spin-coating of MAPbI3 precursor solution, by using a one-step solution deposition method. White perovskite film showed a multi-layer grain packing morphology, which had fewer horizontal grain boundaries. It demonstrated better properties such as larger charge carrier mobility and better contact with [6, 6]-phenyl-C61 -butyric acid methyl ester (PCBM), which led to a larger short-circuit current ( J SC ) of a perovskite solar cell of 21.66 mA cm −2, whereas it was 18.7 mA cm −2 for the device based on a common dark-brown perovskite film. The stability of the intermediate phase plays an important role in the morphology of perovskite film.