铅卤钙钛矿-聚合物复合材料的制备及应用

With excellent photoelectric properties, lead halide perovskite nanocrystals ( NCs ) show great potential in solar cells, photoelectric detection, biological imaging and other fields. However, the poor stability of lead halide perovskite NCs restricts practical applications. Within a few years, many strategies have been developed to solve the problems of poor stability of perovskite NCs, such as ion doping, surface passivation and surface cladding. Noteworthily, it is an effective strategy developed recently that enhance the stability of perovskite by embedding perovskite NCs into polymer and preparing perovskite-polymer composites. Specially, the dense polymer matrix endows the lead halide perovskite NCs with excellent water stability. This review summarizes the preparation of perovskite-polymer composites and their applications in the fields of light-emitting devices and biomedicine. At the same time, the preparation methods of perovskite-polymer composites are discussed in details, which can be classified into three types: blending, in-situ polymerization and in-situ perovskite growth / precipitation method. These methods will be a guide to overcome the limitation of perovskite NCs and impel the development of their practical application. In addition, the existing problems for encapsulating perovskite NCs into polymer matrix are highlighted, while some suggestions for further improving the performance of perovskite-polymer composites are discussed. Finally, the future development of perovskite- polymer composites is prospected.