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Cover Feature: A Novel Sterically Bulky Hole Transporter to Remarkably Improve the Lifetime of Thermally Activated Delayed Fluorescent OLEDs at High Brightness (Chem. Eur. J. 18/2018)
Author(s) -
Kamata Takahiro,
Sasabe Hisahiro,
Igarashi Masahiro,
Kido Junji
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201800133
Subject(s) - oled , fluorescence , quantum efficiency , brightness , photochemistry , optoelectronics , materials science , electrical efficiency , chemistry , power (physics) , optics , nanotechnology , physics , layer (electronics) , quantum mechanics
A hexaphenylbenzene derivative hole‐transporter significantly enhances the lifetime of organic light‐emitting devices (OLEDs) based on thermally activated delayed fluorescence (TADF) at high brightness. A green TADF OLED simultaneously achieves a high external quantum efficiency of over 20 %, a high power efficiency of 54 lm W −1 , and operation lifetime at 50 % of approximately 10 000 h at 1000 nit. This result promises a bright future for TADF OLED. More information can be found in the Full Paper by H. Sasabe, J. Kido et al. on page 4590.