Color Tunable, Flexible, and Efficient Light Emitting Diodes Composed of Metal Halide Perovskites

Barry P. Rand, Zhengguo Xiao, Lianfeng Zhao, Ross A. Kerner

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Hybrid organic-inorganic halide perovskite materials such as methylammonium lead iodide are gaining interest in the thin film optoelectronics community due to their promising optoelectronic properties. We have established a processing paradigm to realize films with roughness on the order of 1 nanometer that consists of nanoscale crystallites, formed by incorporating a bulky organoammonium halide in addition to the stoichiometric 3D perovskite precursors. These bulky ligands passivate the 3D crystal, lead to considerably enhanced luminescence quantum yields, and increase stability. Making light emitting devices from such films result in devices with external quantum efficiency exceeding 10% and which can overcome the otherwise intrinsic brittleness of metal halide perovskite films. Finally, they allow for stabilizing mixed halide (I and Br) stoichiometries such that we can tune emission color from the green to red wavelengths.

Original languageEnglish (US)
Pages (from-to)212-213
Number of pages2
JournalDigest of Technical Papers - SID International Symposium
Volume49
Issue number1
DOIs
StatePublished - 2018
EventSID Symposium, Seminar, and Exhibition 2018, Display Week 2018 - Los Angeles, United States
Duration: May 20 2018May 25 2018

All Science Journal Classification (ASJC) codes

  • General Engineering

Keywords

  • bromide
  • flexible
  • iodide
  • metal halide perovskite

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