Coordination Force-led Multifunctional molecule for Efficient Perovskite Solar Cells

Abstract

Perovskite solar cells (PSCs) have garnered great interest as an innovative and high-performance photovoltaic technology, and its maximum photovoltaic conversion efficiency (PCE) have exceeded 26%, approaching the theoretical maximum PCE's Shockley–Queisser limit, approximately 33%. In this process, various multifunctional molecule, which contains multiple functional groups, have been incorporated into the perovskite layer and interface layer for enhancing the performance of PSCs, of course with big potential to further elevate the PCE to its theoretical peak. In this review, we aim to explore the impact of coordination force-led multifunctional molecule, such as contain -C=O, -S=O, -P=O and other electron-rich functional groups, on the performance of perovskite film and device, therefore providing a comprehensive mechanism analysis of these molecule with different or similar functional groups on modulating morphology, suppressing nonradiative recombination, adjusting energy level alignment and enhancing operational stability. The application of these coordination force-led multifunctional molecule includes 1) perovskite active layer, 2) bottom and up interface between perovskite and charge transport layer, 3) hole and electron transport layer, which all have been analyzed in detail. Finally, we looked forward to the potential of this kind of coordination force-led multifunctional molecule for the further performance improvement and commercialization of PSC. We believe that this review holds a significant reference value in identifying efficient coordination force-led multifunctional molecule to further improve the performance of PSCs.