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

Fangming Jin, Bo Zhao, Bei Chu, Haifeng Zhao, Zisheng Su, Wenlian Li, Fu Rong ZHU

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

The effect of morphology control on the performance of inorganic cesium lead halide based green perovskite light-emitting diodes (PeLEDs) was analyzed. 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. A peak luminance of 4590 cd m-2 was obtained for the PeLEDs prepared 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 an important role in modulating the current losses and the radiative decay rate, which were optimized in this work for attaining efficient operation of the PeLEDs.

Original languageEnglish
Pages (from-to)1573-1578
Number of pages6
JournalJournal of Materials Chemistry C
Volume6
Issue number6
DOIs
Publication statusPublished - 2018

Scopus Subject Areas

  • Chemistry(all)
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Morphology control towards bright and stable inorganic halide perovskite light-emitting diodes'. Together they form a unique fingerprint.

Cite this