Quantitative fraction analysis of coexisting phases in a polycrystalline CH3NH3PbI3 perovskite. (27th September 2018)

• Record Type: Journal Article
• Authors: Kim, Tae Woong; Matsushita, Tomonori; Uchida, Satoshi; Kondo, Takashi; Segawa, Hiroshi
• Is Part Of: Applied physics express. Volume 11:Number 10(2018)
• Publication Date: 2018-09-27
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.11.101401
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: We report the fractions of coexisting phases in a polycrystalline CH3 NH3 PbI3 at room temperature. By a quantitative analysis of a selected-area electron diffraction pattern, we identified that the fractions of tetragonal and cubic phases were 73 and 27%, respectively (tetragonal: 57%, cubic: 12%, and double-layer superlattice: 31%). High-resolution transmission electron microscopy confirmed that the fractions of the tetragonal and cubic coexisting phases were 76 and 24%, respectively, which existed in the forms of a single phase (tetragonal: 58%, cubic: 6%) and double-layer superlattice (36%).