Progress in Multifunctional Molecules for Perovskite Solar Cells

摘要

Organic–inorganic halide perovskite solar cells (PSCs) have recently attractedmuch attention with the recent certified power conversion efficiency (PCE) recordexceeding 24%. To date, many approaches have been developed for producinghigh-performance PSCs, in which the application of multifunctional moleculesplays an important role. The multifunctional molecules can modify the morphologyof perovskite films and/or passivate the surface defects through interactionswith the perovskites’ boundaries and/or the charge carrier extractioninterfaces. As a result, both the PCEs and the stability of PSCs are improved. Therecent progress in the development of multifunctional molecules-incorporatedPSCs is reviewed. The importance of further understanding of the role of themultifunctional molecules in the perovskite film formation process and defectpassivation mechanism is discussed. Further research in terms of multifunctionalmolecules can help to develop high-performance devices with long-termstability for future practical applications of PSCs.