Cation coordination type perovskite with stable structure as well as preparation method and application thereof

The invention discloses a cation coordination type perovskite with a stable structure and a preparation method and application thereof, the molecular formula is [(4AMTP) PbBr2] 2PbBr4, and a 4AMTP coordinated PbBr2 unit forms a cation layer. The photoluminescence behavior of the [(4AMTP) PbBr2] 2PbBr4 shows crystal size dependence, the relatively large crystal shows purple blue emission, two peak values exist at 414 nm and 431 nm, and the relatively small particle size (lt; 50 [mu] m) shows a single emission peak at 425 nm. Meanwhile, the compound shows blue light photoelectric response under the illumination of 405 nm, the [(4AMTP) PbBr2] 2PbBr4 is used for preparing a single crystal device, and the on/off ratio is 175. Therefore, the [(4AMTP) PbBr2] 2PbBr4 becomes a promising candidate material for light emitting and photoelectric device application. 本发明公开了一种结构稳定的阳离子配位型钙钛矿及其制备方法和应用，分子式为[(4AMTP)PbBr2]2PbBr4，其中，4AMTP配位的PbBr2单元构成了阳离子层。[(4AMTP)PbBr2]2PbBr4的光致发光行为表现出晶体尺寸依赖性，较大的晶体显示紫蓝色发射，在414和431nm处有两个峰值，而较小粒度(