Composition-tuned MAPbBr₃ nanoparticles with addition of Cs⁺ cations for improved photoluminescence.

ABSTRACT: Hybrid organic-inorganic lead halide perovskite nanoparticles are promising candidates for optoelectronic applications. This investigation describes the structural and optical properties of MA _x Cs_1-x PbBr₃ mixed cation colloidal nanoparticles spanning the complete compositional range of Cs substitution. A monotonic progression in the cubic lattice parameter (a) with changes in the Cs⁺ content confirmed the formation of mixed cation materials. More importantly, time-resolved photoluminescence (TRPL) revealed the optimized 13 mol% Cs nanoparticle composition exhibits the longest charge carrier lifetime and enhancement in radiative pathways. This sample also showed the highest photoluminescence quantum yield (PLQY) of ∼88% and

SUBMITTER: Dintakurti SSH 

PROVIDER: S-EPMC9036789 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature