Interfacial Charge Transfer Processes in Perovskite-based Materials

Perovskite-based materials have gained significant attention in the last few years both in nanotechnology and optoelectronic applications. The interface between perovskites and electron (or hole) transport layers (ETL or HTL) plays a critical role in the charge transport properties in perovskite-based devices which eventually govern the final efficiency of the device. Therefore, it is extremely important to understand the interfacial charge transfer/transport processes in these materials. In this minireview, we summarize the ultrafast interfacial charge transfer processes from perovskites to electron/hole quenchers and highlight the importance of the surface coupling of such quenchers on the charge transfer and solar cell efficiency. A few examples of ETL and HTL and their effect on the device performance have been discussed. Therefore, the review will provide a platform to understand the importance of interfacial charge transfer processes and their effect on the final device efficiency in perovskite-based materials.