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Morphology control towards bright and stable inorganic halide perovskite light-emitting diodes

Abstract

The effect of morphology control on the performance of inorganic cesium lead halide based green perovskite light-emitting diodes (PeLEDs) was analyzed. The PeLEDs were prepared using two different formulation approaches: (1) the solution was prepared by dissolving CsPbBr3 powders in dimethyl sulfoxide (DMSO), and (2) the precursor solution was formulated by dissolving CsBr and PbBr2 powders with different molar ratios of CsBr to PbBr2 in DMSO. The peak luminance of 4590 cd/m2 was obtained for PeLEDs made with CsPbBr3-solution, which is 48 and 12 times higher than that of the optimized PeLEDs fabricated using CsBr/PbBr2 precursor solutions with different molar ratios of CsBr to PbBr2 of 2:1 and 1:1. Our results reveal that the morphology and control of excess Pb atoms in the perovskite emitting layer play the important role in modulating the current losses and radiative decay rate, which were optimized in this work for attaining efficient operation of the PeLEDs.

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Publication details

The article was received on 11 Oct 2017, accepted on 10 Jan 2018 and first published on 11 Jan 2018


Article type: Paper
DOI: 10.1039/C7TC04631F
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Morphology control towards bright and stable inorganic halide perovskite light-emitting diodes

    F. Jin, B. Zhao, B. Chu, H. Zhao, Z. Su, W. Li and F. Zhu, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C7TC04631F

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