Light Emitting Diodes Based on Inorganic Composite Halide Perovskites

Abstract

CsPbBr3 is a promising type of light‐emitting halide perovskite with inorganic composition and desirable thermal stability. The luminescence efficiency of pristine CsPbBr3 thin films, however, appears to be limited. In this work, light emitting diodes based on CsPbBr3|Cs4PbBr6 composites are demonstrated. Both quantum efficiency and emission brightness are improved significantly compared with similar devices constructed using pure CsPbBr3. The high brightness can be attributed to the enhanced radiative recombination from CsPbBr3 crystallites confined in the Cs4PbBr6 host matrix. The unfavorable charge transport property of Cs4PbBr6 can be circumvented by optimizing the ratio between the host and the guest components and the total thickness of the composite thin films. The inorganic composition of the emitting layer also leads to improved device stability under the condition of continuous operation.

Document Details

Document Type
Pub Defense Publication
Publication Date
Dec 12, 2018
Source ID
10.1002/adfm.201807345

Entities

People

  • Biwu Ma
  • Eric Lochner
  • Hanwei Gao
  • Kenneth Hanson
  • Lei Tan
  • Xi Wang
  • Xiujun Lian
  • Yan Zhou
  • Yichuan Ling

Organizations

  • Florida State University
  • National High Magnetic Field Laboratory
  • Office of Naval Research

Tags

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Nanocomposite Materials Science
  • Plasma Physics.

Technology Areas

  • Quantum Computing