Perovskite nanocrystal superlattices and their application in light-emitting devices

Abstract

The assembly of perovskite nanocrystals (NCs) into close-packed and long-range-ordered superlattices has expanded the family of perovskite materials and provides a platform for modulating their optoelectronic properties. Numerous studies have been devoted to promote the development of perovskite NC superlattices. However, due to the lack of a comprehensive and systematic understanding of the synthesis strategies, internal interactions on assembly processes, and diversity of structures, perovskite NC superlattices are difficult to be controllably acquired and sufficiently utilized. In this review, recent advances in perovskite NC superlattices are summarized comprehensively and thoroughly. This review begins with the discussion on the formation of perovskite NC superlattices, covering the various driving forces and synthesis methods for superlattice assembly. The diverse superlattice structure and fascinating optoelectronic properties exhibited by superlattices are then analyzed. Furthermore, the contemporary application of perovskite NC superlattices in light-emitting devices are introduced. Finally, some perspectives on the current challenges and future directions for perovskite NC superlattices are present to promote further development in this field.