Shao, ZhipengWang, ZaiweiLi, ZhipengFan, YingpingMeng, HongguangLiu, RanranWang, YanHagfeldt, AndersCui, GuangleiPang, Shuping2019-06-182019-06-182019-06-182019-04-1610.1002/anie.201814024https://infoscience.epfl.ch/handle/20.500.14299/157684WOS:000466593400014An 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.Chemistry, MultidisciplinaryChemistrydefect healinginorganic perovskitesmethylaminesolar cellsthin filmsevolutiontext::journal::journal article::research article