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Organic Electronics: Bifunctional Star‐Burst Amorphous Molecular Materials for OLEDs: Achieving Highly Efficient Solid‐State Luminescence and Carrier Transport Induced by Spontaneous Molecular Orientation (Adv. Mater. 19/2013)
Author(s) -
Kim Jun Yun,
Yasuda Takuma,
Yang Yu Seok,
Adachi Chihaya
Publication year - 2013
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.201370122
Subject(s) - materials science , bifunctional , electroluminescence , amorphous solid , oled , luminescence , organic electronics , optoelectronics , substrate (aquarium) , nanotechnology , voltage , organic chemistry , transistor , electrical engineering , chemistry , oceanography , engineering , geology , catalysis , layer (electronics)
A design strategy for achieving both efficient solid‐state luminescence and high carrier transport properties in organic amorphous molecular materials is demonstrated by Chihaya Adachi, Takuma Yasuda, and co‐workers on page 2666 . The designed star‐burst molecules form amorphous solid films, in which they can align horizontally onto the substrate. This preferential horizontal molecular orientation leads to enhanced charge carrier transport and improved light emission. A high external electroluminescence quantum efficiency of up to 5.9% is achieved by incorporating these bifunctional materials in OLEDs.