Highly Efficient Organic Light-Emitting Diode Based on a Hidden Thermally Activated Delayed Fluorescence Channel in a Heptazine Derivative

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 asc...

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Bibliographic Details
Published inAdvanced materials (Weinheim) Vol. 25; no. 24; pp. 3319 - 3323
Main Authors Li, Jie, Nakagawa, Tetsuya, MacDonald, James, Zhang, Qisheng, Nomura, Hiroko, Miyazaki, Hiroshi, Adachi, Chihaya
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 25.06.2013
WILEY‐VCH Verlag
Subjects
Aniline Compounds - chemistry
Channels
Derivatives
Electroluminescence
Fluorescence
heptazine
Heterocyclic Compounds, 3-Ring - chemistry
Light
Luminance
Luminescent Measurements - instrumentation
orange-red device
Organic Chemicals - chemistry
Organic light emitting diodes
organic light-emitting diode
Quantum efficiency
Quantum Theory
thermally activated delayed fluorescence
Triazines - chemistry
Upconversion
Online AccessGet full text
ISSN0935-9648
1521-4095
1521-4095
DOI10.1002/adma.201300575

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Summary: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.
Bibliography:istex:56371C90C5735489101FFB8DDFB2045724093C72
ArticleID:ADMA201300575
ark:/67375/WNG-D0188T6D-7
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ISSN:0935-9648
1521-4095
1521-4095
DOI:10.1002/adma.201300575