A Scalable Methylamine Gas Healing Strategy for High‐Efficiency Inorganic Perovskite Solar Cells. (19th March 2019)

• Record Type: Journal Article
• Authors: Shao, Zhipeng; Wang, Zaiwei; Li, Zhipeng; Fan, Yingping; Meng, Hongguang; Liu, Ranran; Wang, Yan; Hagfeldt, Anders; Cui, Guanglei; Pang, Shuping
• Is Part Of: Angewandte Chemie. Volume 131:Number 17(2019)
• Page Start: 5643
• Page End: 5647
• Publication Date: 2019-03-19
• Subjects: Anorganische Perowskite -- Defektheilung -- Dünne Schichten -- Methylamin -- Solarzellen; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201814024
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: An easy and scalable methylamine (MA) gas healing method was realized for inorganic cesium‐based perovskite (CsPbX3 ) layers by incorporating a certain amount of MAX (X=I or Br) initiators into the raw film. It was found that the excess MAX accelerated the absorption of the MA gas into the CsPbX3 film and quickly turned it into a liquid intermediate phase. Through the healing process, a highly uniform and highly crystalline CsPbX3 film with enhanced photovoltaic performance was obtained. Moreover, the chemical interactions between a series of halides and MA gas molecules were studied, and the results could offer guidance in further optimizations of the healing strategy.