Overcoming the electroluminescence efficiency limitations of perovskite light-emitting diodes
Pohang University of Science and Technology · Gwangju Institute of Science and Technology · +3 more institutions
Abstract
Organic-inorganic hybrid perovskites are emerging low-cost emitters with very high color purity, but their low luminescent efficiency is a critical drawback. We boosted the current efficiency (CE) of perovskite light-emitting diodes with a simple bilayer structure to 42.9 candela per ampere, similar to the CE of phosphorescent organic light-emitting diodes, with two modifications: We prevented the formation of metallic lead (Pb) atoms that cause strong exciton quenching through a small increase in methylammonium bromide (MABr) molar proportion, and we spatially confined the exciton in uniform MAPbBr3 nanograins (average diameter = 99.7 nanometers) formed by a nanocrystal pinning process and concomitant…
Citation impact
- FWCI
- 156.01
- Percentile
- 100%
- References
- 45
Authors
13- HCHimchan ChoCorresponding
Pohang University of Science and Technology
- SJSu-Hun JeongCorresponding
Pohang University of Science and Technology
- MHMin Ho ParkCorresponding
Pohang University of Science and Technology
- YKYoung‐Hoon Kim
Pohang University of Science and Technology
- CWChristoph Wolf
Pohang University of Science and Technology
Topics & keywords
- Electroluminescence
- Optoelectronics
- Light-emitting diode
- Perovskite (structure)
- Diode
- Materials science
- Engineering physics
- Physics