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3‐Cyano Imidazopyridine Acceptor‐based Bipolar and n ‐type Host Materials for Phosphorescent Organic Light‐Emitting Diodes
Author(s) -
Kothavale Shantaram,
Lee Kyung Hyung,
Lee Jun Yeob
Publication year - 2018
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.201800440
Subject(s) - phosphorescence , chemistry , imidazopyridine , pyridine , host (biology) , acceptor , photochemistry , oled , medicinal chemistry , combinatorial chemistry , organic chemistry , fluorescence , ecology , physics , layer (electronics) , quantum mechanics , biology , condensed matter physics
Abstract Two host materials named 8‐(3‐(9H‐carbazol‐9‐yl)phenyl)‐2‐phenylimidazo[1,2‐a]pyridine‐3‐carbonitrile (mCzImPy) and 8,8′‐(1,3‐phenylene)bis(2‐phenylimidazo[1,2‐a]pyridine‐3‐carbonitrile) (mBisImPy) were synthesized as a bipolar host and a n‐type host, respectively, from the herocyclic imidazopyridine unit through its 3‐position CN modification. They worked as the hosts of yellow phosphorescent emitter and the mCzImPy host achieved high quantum efficiency of 18.2% in the yellow phosphorescent devices. Therefore, the 3‐cyanoimidazopyridine showed potential as an electron transport unit of host design.