Properties of Halide Perovskite Photodetectors with Little Rubidium Incorporation.

ABSTRACT: This study investigates the effects of Rb doping on the Rb-formamidinium-methylammonium-PbI3 based perovskite photodetectors. Rb was incorporated in the perovskite films with different contents, and the corresponding photo-response properties were studied. Doping of few Rb (~2.5%) was found to greatly increase the grain size and the absorbance of the perovskite. However, when the Rb content was greater than 2.5%, clustering of the Rb-rich phases emerged, the band gap decreased, and additional absorption band edge was found. The excess Rb-rich phases were the main cause that degraded the performance of the photodetectors. By space charge limit current analyses, the Rb was found to passivate the defects in the perovskite, lowering the leakage current and reducing the trap densities of carrie

SUBMITTER: Hsiao YW 

PROVIDER: S-EPMC8746863 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature