CRYSTALLINE ORGANIC-INORGANIC HALIDE PEROVSKITE THIN FILMS AND METHODS OF PREPARATION
申请人:Cornell University
公开号:US20160251303A1
公开(公告)日:2016-09-01
A film comprising a crystalline halide perovskite composition having the following formula:
AMX
3
(1)
wherein: A is an organic cation selected from the group consisting of methylammonium, tetramethylammonium, formamidinium, and guanidinium; M is at least one divalent metal; and X is independently selected from halide atoms; wherein the crystalline film of the halide perovskite composition possesses at least one of an average grain size of at least 30 microns, substantial crystal orientation evidenced in an ordering parameter of at least 0.6, and a level of crystallinity of at least 90%. Methods for producing films of these halide perovskite compositions using ionic liquids instead of volatile organic solvents are also described herein.
一种晶态卤化物钙钛矿组成的电影,其化学式为:AMX3(1),其中:A是从甲基铵,四甲基铵,甲酰胺铵和胍铵组成的有机阳离子;M是至少一种二价金属;X是独立选择的卤素原子;其中,卤化物钙钛矿组成的晶体薄膜具有至少以下的其中一项:平均晶粒尺寸至少为30微米,具有明显的晶体取向,表现为至少0.6的有序参数,晶体度至少为90%。本文还描述了使用离子液体而不是挥发性有机溶剂制备这些卤化物钙钛矿组成的薄膜的方法。