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High‐Efficiency Blue Light‐Emitting Diodes Based on a Polyphenylphenyl Compound with Strong Electron‐Accepting Groups
Author(s) -
Xu X. J.,
Chen S. Y.,
Yu G.,
Di C. A.,
You H.,
Ma D. G.,
Liu Y. Q.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200601919
Subject(s) - materials science , blue light , diode , oled , optoelectronics , electron , layer (electronics) , light emitting diode , photochemistry , nanotechnology , chemistry , physics , quantum mechanics
The synthesis and characterization of two new polyphenylphenyl compounds is reported. One compound (CPP) acts as a blue light‐emitting material, but contains strong electron‐accepting groups that form exciplexes with electron‐donating arylamines that are widely used as hole‐transporting materials. Inserting a layer of the other compound into the organic light‐emitting diodes (see figure) suppresses the formation of exciplexes, and gives high‐efficiency blue‐light emission from the CPP layer.