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Highly Efficient, Conventional, Fluorescent Organic Light‐Emitting Diodes with Extended Lifetime
Author(s) -
Kim HyunGu,
Kim KwonHyeon,
Kim JangJoo
Publication year - 2017
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.201702159
Subject(s) - materials science , oled , common emitter , fluorescence , excited state , optoelectronics , iridium , excimer , exciton , diode , quantum efficiency , energy transfer , doping , photochemistry , optics , nanotechnology , atomic physics , molecular physics , chemistry , biochemistry , physics , layer (electronics) , quantum mechanics , catalysis
Abstract Highly efficient, yellow‐fluorescent organic light‐emitting diodes with a maximum external quantum efficiency exceeding 25.0% and extended lifetime are reported using iridium‐complex sensitizers doped in an exciplex host. Energy transfer processes reduce the lifetime of the exciplex and excitons on the Ir complexes and enable an excited state to exist in a conventional fluorescent emitter, thereby increasing device lifetime. The device stability depends on the location of the excited state.