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P‐184: Boron Derivatives as Deep Blue Fluorescent Materials for High Efficiency and Long Lifetime
Author(s) -
Lee Kyung Hyung,
Lee Jun Yeob,
Oh Hyung Yoon
Publication year - 2019
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.13341
Subject(s) - fluorescence , boron , anthracene , common emitter , photochemistry , exciton , materials science , quantum efficiency , quantum yield , oled , optoelectronics , electroluminescence , diode , chemistry , nanotechnology , optics , organic chemistry , physics , layer (electronics) , quantum mechanics
Deep blue fluorescent organic light‐emitting diodes were developed using boron derived 5,9‐diphenyl‐5H,9H‐[1,4]benzazaborino[2,3,4‐kl]phenazaborine (DABNA) and 2,12‐di‐tert‐butyl‐5,9‐bis(4‐(tert‐butyl)phenyl)‐5,9‐dihydro‐5,9‐diaza‐13b‐boranaphtho[3,2,1‐de]anthracene (t‐DABNA) as fluorescent emitters rather than thermally activated delayed fluorescent emitters for long lifetime. The DABNA and t‐DABNA boron emitters were doped in a 9,10‐bis (1‐naphtyl) anthracene (α‐ADN) host to harvest singlet excitons only and stabilize triplet excitons for long periods. The t‐DABNA emitter exhibits a high external quantum efficiency of 7.8% as a blue fluorescent emitter. The lifetime of the boron derived emitters was much longer than a blue emitter derived from pyrene. This work demonstrated the effectiveness of the boron derived emitters as deep blue fluorescent emitters.