Vapor-Deposited Cs₂AgBiCl₆ Double Perovskite Films toward Highly Selective and Stable Ultraviolet Photodetector.

ABSTRACT: Double perovskites have shown great potentials in addressing the toxicity and instability issues of lead halide perovskites toward practical applications. However, fabrication of high-quality double perovskite thin films has remained challenging. Here, sequential vapor deposition is used to fabricate high-quality Cs₂AgBiCl₆ perovskite films with balanced stoichiometry, superior morphology, and highly oriented crystallinity, with an indirect bandgap of 2.41 eV. Using a diode structure, self-powered Cs₂AgBiCl₆ ultraviolet (UV) photodetectors are demonstrated with high selectivity centered at 370 nm, with low dark current density (≈10^-7 mA cm^-2), high photoresponsivity (≈10 mA W^-1), and detectivity (≈10¹² 

SUBMITTER: Wang M 

PROVIDER: S-EPMC7284202 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature