Thin-Film Transformation of NH4PbI3to CH3NH3PbI3Perovskite: A Methylamine-Induced Conversion–Healing Process

Yingxia Zong, Yuanyuan Zhou, Minggang Ju, Hector F. Garces, Amanda R. Krause, Fuxiang Ji, Guanglei Cui, Xiao Cheng Zeng, Nitin P. Padture, Shuping Pang

Research output: Contribution to journalArticlepeer-review

65 Scopus citations


Methylamine-induced thin-film transformation at room-temperature is discovered, where a porous, rough, polycrystalline NH4PbI3non-perovskite thin film converts stepwise into a dense, ultrasmooth, textured CH3NH3PbI3perovskite thin film. Owing to the beneficial phase/structural development of the thin film, its photovoltaic properties undergo dramatic enhancement during this NH4PbI3-to-CH3NH3PbI3transformation process. The chemical origins of this transformation are studied at various length scales.

Original languageEnglish (US)
Pages (from-to)14723-14727
Number of pages5
JournalAngewandte Chemie - International Edition
Issue number47
StatePublished - Nov 14 2016


  • hybrid perovskites
  • solar cells
  • thin films

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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