18‐1: Invited Paper: Color Tunable, Flexible, and Efficient Light Emitting Diodes Composed of Metal Halide Perovskites
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 01, 2018
- Source ID
- 10.1002/sdtp.12525
Entities
People
- Barry P Rand
- Lianfeng Zhao
- Ross A. Kerner
- Zhengguo Xiao
Organizations
- Office of Naval Research
- Princeton University