结晶
材料科学
化学工程
成核
薄膜
旋涂
再结晶(地质)
正交晶系
纳米晶材料
溶解
掠入射小角散射
过饱和度
光致发光
亚稳态
化学物理
纳米晶
结晶学
散射
化学
纳米技术
有机化学
晶体结构
光学
小角中子散射
古生物学
工程类
中子散射
物理
生物
光电子学
作者
Shambhavi Pratap,Finn Babbe,Nicola S. Barchi,Zhenghao Yuan,Tina Luong,Zach Haber,Tze‐Bin Song,Jonathan Slack,Camelia Stan,Nobumichi Tamura,Carolin M. Sutter‐Fella,Peter Müller‐Buschbaum
标识
DOI:10.1038/s41467-021-25898-5
摘要
Complex phenomena are prevalent during the formation of materials, which affect their processing-structure-function relationships. Thin films of methylammonium lead iodide (CH3NH3PbI3, MAPI) are processed by spin coating, antisolvent drop, and annealing of colloidal precursors. The structure and properties of transient and stable phases formed during the process are reported, and the mechanistic insights of the underlying transitions are revealed by combining in situ data from grazing-incidence wide-angle X-ray scattering and photoluminescence spectroscopy. Here, we report the detailed insights on the embryonic stages of organic-inorganic perovskite formation. The physicochemical evolution during the conversion proceeds in four steps: i) An instant nucleation of polydisperse MAPI nanocrystals on antisolvent drop, ii) the instantaneous partial conversion of metastable nanocrystals into orthorhombic solvent-complex by cluster coalescence, iii) the thermal decomposition (dissolution) of the stable solvent-complex into plumboiodide fragments upon evaporation of solvent from the complex and iv) the formation (recrystallization) of cubic MAPI crystals in thin film.
科研通智能强力驱动
Strongly Powered by AbleSci AI