Size-dependent photophysical properties of individual halide perovskite nanocrystal quantum dots

Abstract

Lead halide perovskites are unique semiconductor materials synthesized via low-temperature solution methods. They are expected to play a crucial role in next-generation optoelectronics, particularly in the advancement of solar cells and light-emitting devices. Lead halide perovskite nanocrystals exhibit luminescence properties not found in conventional cadmium selenide nanocrystals, which have been the subject of the most detailed studies to date. Consequently, these new material nanocrystals show great potential for innovative light-emitting device applications. This review paper summarizes the recent works of our group at Kyoto University on the low-temperature photoluminescence spectra of single perovskite nanocrystal quantum dots, emphasizing the size-dependent optical phenomena of excitons, trions, and biexcitons.