Interfaced Structures between Halide Perovskites: From Basics to Construction to Optoelectronic Applications

摘要

The tsunami of research on halide perovskites over the last decade is sparkedby the unexpected revelation of their singular properties, creating a new fieldof perovskite optoelectronics with great achievements. Soon recognized isthe importance of perovskite–perovskite (pe–pe) interfaced structures withcoherent interfaces on account of the ease with which to tailor perovskite semiconductingproperties, and the prospect to inject new functions and boostdevice performance. There have been prominent developments in the pe–peinterfaced structures concerning their innovative construction strategies,distinctive properties, and interesting optoelectronic applications. This articleprovides an overview of recent advances on the pe–pe interfaced structureswith a view to informing their rational design and guiding the improvementof the derivate devices. It begins with introduction of the structures, energylevels, band alignments, and ion migration pertaining to the pe–pe interfacedstructures. Next, five synthetic approaches are systematically presented. Then,theories, simulations, and characterizations of the interfaced structures arediscussed. This is followed by highlighting the distinctive applications of thepe–pe interfaced structures in solar cells, detectors, and light-emitting diodes.Finally, the review is concluded by comprehensively summing up the keypoints covered and pointing out promising research directions along the linefor future endeavors.