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Luminous Butterflies: Efficient Exciton Harvesting by Benzophenone Derivatives for Full‐Color Delayed Fluorescence OLEDs
Author(s) -
Lee Sae Youn,
Yasuda Takuma,
Yang Yu Seok,
Zhang Qisheng,
Adachi Chihaya
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201402992
Subject(s) - benzophenone , photochemistry , oled , fluorescence , electroluminescence , optoelectronics , materials science , excited state , exciton , luminescence , singlet state , quantum efficiency , chemistry , optics , layer (electronics) , nanotechnology , physics , atomic physics , quantum mechanics
Butterfly‐shaped luminescent benzophenone derivatives with small energy gaps between their singlet and triplet excited states are used to achieve efficient full‐color delayed fluorescence. Organic light‐emitting diodes (OLEDs) with these benzophenone derivatives doped in the emissive layer can generate electroluminescence ranging from blue to orange–red and white, with maximum external quantum efficiencies of up to 14.3 %. Triplet excitons are efficiently harvested through delayed fluorescence channels.