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46.5L: Late‐News Paper : Confinement of Triplet‐Excited States by Fluorinated Polyvinylcarbazole for High Efficiency OLEDs
Author(s) -
Enomoto Shintaro,
Uchikoga Shuichi,
Mizuno Yukitami,
Takasu Isao,
Sawabe Tomoaki,
Amano Akio,
Wada Atsushi,
Yoshida Jiro,
Ono Tomio
Publication year - 2009
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 - 10.1889/1.3256879
Subject(s) - iridium , oled , phosphorescence , materials science , photochemistry , excited state , optoelectronics , diode , chemistry , nanotechnology , physics , fluorescence , optics , atomic physics , catalysis , organic chemistry , layer (electronics)
Based on molecular orbital calculation, solution processable fluorinated polyvinylcarbazole (poly (N‐vinyl 2,7‐ difluorocarbazole), (F‐PVK)) is synthesized as host material for blue electrophosphorescent organic light‐emitting diodes (OLEDs). F‐PVK successfully confined triplet excitons to the guest phosphorescent material, iridium( III ) bis[(4,6‐ difluorophenyl)‐pyridinato‐N,C2′]picolinate (FIrpic). To the authors' knowledge, it showed the highest up‐to‐date solution‐ processed blue polymer OLED efficiency of 27 cd/A at 760 cd/m 2 .