A simple method to improve the performance of perovskite light-emitting diodes via layer-by-layer spin-coating CsPbBr₃ quantum dots.

ABSTRACT: Recently, all-inorganic halide perovskite quantum dots have become a very promising material for light-emitting diodes. Herein, we demonstrate a facile method, namely, layer-by-layer spin-coating of CsPbBr₃ QDs to improve device performance. After optimization of the number of emissive layers, the maximum EQE can be increased from an initial value of 0.69% to 2.31%. Additionally, we inserted a CBP layer between PEDOT:PSS and CsPbBr₃ multilayers to balance charge transportation and recombination. As a result, a 37% improvement in EQE (up to 3.16%) and highest luminance of 2629 cd m^-2 are obtained.

SUBMITTER: Li B 

PROVIDER: S-EPMC9083367 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature