Single-Layer Blue Organic Light-Emitting Diodes With Near-Unity Internal Quantum Efficiency

Single-Layer Blue Organic Light-Emitting Diodes With Near-Unity Internal Quantum Efficiency

© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 26 vom: 02. Juni, Seite e2300574
1. Verfasser: Sachnik, Oskar (VerfasserIn)
Weitere Verfasser: Li, Yungui, Tan, Xiao, Michels, Jasper J, Blom, Paul W M, Wetzelaer, Gert-Jan A H
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article balanced charge transport blue light emission high-work function contacts single-layer organic light-emitting diodes thermally activated delayed fluorescence unity internal quantum efficiency
Beschreibung
Zusammenfassung:© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.
Efficient organic light-emitting diodes (OLEDs) commonly comprise a multilayer stack including charge-transport and charge- and exciton-blocking layers, to confine charge recombination to the emissive layer. Here, a highly simplified single-layer blue-emitting OLED is demonstrated based on thermally activated delayed fluorescence with the emitting layer simply sandwiched between ohmic contacts consisting of a polymeric conducting anode and a metal cathode. The single-layer OLED exhibits an external quantum efficiency of 27.7% with minor roll-off at high brightness. The internal quantum efficiency approaches unity, demonstrating that highly simplified single-layer OLEDs without confinement layers can achieve state-of-the-art performance, while greatly reducing the complexity of the design, fabrication, and device analysis
Beschreibung:Date Completed 28.06.2023
Date Revised 28.06.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202300574