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Adv Mater. 2013 Jun 25;25(24):3319-23. doi: 10.1002/adma.201300575. Epub 2013 May 13.

Highly efficient organic light-emitting diode based on a hidden thermally activated delayed fluorescence channel in a heptazine derivative.

Author information

  • 1Department of Applied Chemistry and Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.

Abstract

An orange-red organic light-emitting diode containing a heptazine derivative exhibits high performance with a maximum external quantum efficiency of 17.5 ± 1.3% and a peak luminance of 17000 ± 1600 cd m⁻² without any light out-coupling enhancement. The high electroluminescence performance can be ascribed to the presence of an efficient up-conversion channel from the lowest triplet state to the lowest singlet state.

PMID:
23670919
DOI:
10.1002/adma.201300575
[PubMed - indexed for MEDLINE]
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