Boosting the Self-Trapped Exciton Emission in Alloyed Cs₂ (Ag/Na)InCl₆ Double Perovskite via Cu⁺ Doping.

ABSTRACT: Fundamental understanding of the effect of doping on the optical properties of 3D double perovskites (DPs) especially the dynamics of self-trapped excitons (STEs) is of vital importance for their optoelectronic applications. Herein, a unique strategy via Cu⁺ doping to achieve efficient STE emission in the alloyed lead-free Cs₂ (Ag/Na)InCl₆ DPs is reported. A small amount (1.0 mol%) of Cu⁺ doping results in boosted STE emission in the crystals, with photoluminescence (PL) quantum yield increasing from 19.0% to 62.6% and excitation band shifting from 310 to 365 nm. Temperature-dependent PL and femtosecond transient absorption spectroscopies reveal that the remarkable PL enhancement originates from the increased radiative recombination rate and dens

SUBMITTER: Cheng X 

PROVIDER: S-EPMC8895137 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature