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Highly Air‐Stable Electron‐Transport Material for Ink‐Jet‐Printed OLEDs
Author(s) -
Wei Changting,
Zhuang Jinyong,
Chen Yali,
Zhang Dongyu,
Su Wenming,
Cui Zheng
Publication year - 2016
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.201603994
Subject(s) - materials science , oled , fabrication , spin coating , optoelectronics , diode , thermal stability , electron , coating , quantum efficiency , curing (chemistry) , composite material , chemical engineering , layer (electronics) , medicine , alternative medicine , physics , pathology , quantum mechanics , engineering
A novel cross‐linkable electron‐transport material has been designed and synthesized for use in the fabrication of solution‐processed OLEDs. The material exhibits a low LUMO level of −3.51 eV, a high electron mobility of 1.5×10 −5 cm 2 V −1 s −1 , and excellent stability. An average 9.3 % shrinkage in film thickness was observed for the film after thermal curing. A maximum external quantum efficiency (EQE) of 15.6 % (35.0 cd A −1 ) was achieved for blue‐phosphorescent OLEDs by spin‐coating and 13.8 % (31.0 cd A −1 ) for an ink‐jet‐printed device, both of which are better than the EQE of a control device prepared by vacuum‐deposition (see figure).
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