Deciphering the effect of traps on electronic charge transport properties of methylammonium lead tribromide perovskite.

ABSTRACT: Halide perovskites have undergone remarkable developments as highly efficient optoelectronic materials for a variety of applications. Several studies indicated the critical role of defects on the performance of perovskite devices. However, the parameters of defects and their interplay with free charge carriers remain unclear. In this study, we explored the dynamics of free holes in methylammonium lead tribromide (MAPbBr3) single crystals using the time-of-flight (ToF) current spectroscopy. By combining ToF spectroscopy and Monte Carlo simulation, three energy states were detected in the bandgap of MAPbBr3 In addition, we found the trapping and detrapping rates of free holes ranging from a few microseconds to hundreds of microseconds. Contrary to previous studies, we revealed a strong detra

SUBMITTER: Musiienko A 

PROVIDER: S-EPMC7486106 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature