Back to Search
Start Over
Solution-processed green and blue quantum-dot light-emitting diodes with eliminated charge leakage.
- Source :
- Nature Photonics; Jul2022, Vol. 16 Issue 7, p505-511, 7p
- Publication Year :
- 2022
-
Abstract
- Quantum-dot light-emitting diodes (QD-LEDs) promise a new generation of efficient, low-cost, large-area and flexible electroluminescent devices. However, the inferior performance of green and blue QD-LEDs compared with their red counterpart is hindering the commercialization of QD-LEDs in display and solid-state lighting applications. Here we demonstrate green and blue QD-LEDs with ~100% conversion of the injected charge carriers into emissive excitons. The key to success is the elimination of electron leakage at the organic/inorganic interface by using hole-transport polymers with simultaneous low electron affinity and reduced energetic disorder. Our devices exhibit high external quantum efficiencies over a wide range of luminance values (peak external quantum efficiencies of 28.7% for green and 21.9% for blue) and excellent stability (extrapolated T<subscript>95</subscript> lifetime is 580,000 h for green and 4,400 h for blue QD-LEDs). We expect our work to provide a general strategy for eliminating charge leakage in solution-processed LEDs featuring organic/inorganic interfaces. A new strategy to reduce charge leakage in quantum-dot light-emitting diodes enables high external quantum efficiencies of 28.7% and 21.9% and excellent T<subscript>95</subscript> lifetimes of 580,000 h and 4,400 h for green and blue devices, respectively. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17494885
- Volume :
- 16
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Nature Photonics
- Publication Type :
- Academic Journal
- Accession number :
- 157774619
- Full Text :
- https://doi.org/10.1038/s41566-022-00999-9