In situ investigation of degradation at organometal halide perovskite surfaces by X-ray photoelectron spectroscopy at realistic water vapour pressure

Research output: Contribution to journalArticle

  • External authors:
  • Chun-Ren Ke
  • Aleksander Tedstone
  • Paul O'Brien


Near-ambient-pressure X-ray photoelectron spectroscopy enables the study of the reaction of in situ-prepared methylammonium lead iodide (MAPI) perovskite at realistic water vapour pressures for the first time. We show that MAPI decomposes directly to PbI2, HI and NH3 without formation of methylammonium iodide, allowing us to distinguish between alternative mechanisms for the atmospheric
degradation reaction.

Bibliographical metadata

Original languageEnglish
JournalChemical Communications
Early online date19 Apr 2017
StatePublished - 2017