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Color Tuning of Avobenzone Boron Difluoride as an Emitter to Achieve Full‐Color Emission
Author(s) -
Mo HinWai,
Tsuchiya Youichi,
Geng Yan,
Sagawa Takehiro,
Kikuchi Chika,
Nakanotani Hajime,
Ito Fuyuki,
Adachi Chihaya
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201601257
Subject(s) - materials science , oled , excimer , common emitter , electroluminescence , fluorescence , optoelectronics , boron , diode , photochemistry , layer (electronics) , optics , nanotechnology , chemistry , organic chemistry , physics
Organic light‐emitting diodes (OLEDs) displaying a wide range of emission colors with emission peaks from 450 to 665 nm using a single emitting material, avobenzone boron difluoride (AVB‐BF 2 ), are reported. Color tuning is achieved by controlling the aggregation of AVB‐BF 2 and the formation of a “triadic” exciplex of an AVB‐BF 2 dimer and a host molecule. Various electroluminescent devices containing AVB‐BF 2 cover the whole visible light spectrum and a white‐emitting device with CIE coordinates of (0.35, 0.37) is obtained with a single emitting material in a single emissive layer. Furthermore, an exceptionally high external quantum efficiency of nearly 13% is achieved for a green‐emitting OLED because AVB‐BF 2 exhibits thermally activated delayed fluorescence by forming the exciplex.