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Phenylcarbazole‐Based Phosphine Oxide Host Materials For High Efficiency In Deep Blue Phosphorescent Organic Light‐Emitting Diodes
Author(s) -
Jeon Soon Ok,
Yook Kyoung Soo,
Joo Chul Woong,
Lee Jun Yeob
Publication year - 2009
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.200901274
Subject(s) - phosphorescence , materials science , dopant , phosphine oxide , oled , iridium , phosphorescent organic light emitting diode , doping , optoelectronics , diode , deep blue , quantum efficiency , photochemistry , phosphine , nanotechnology , optics , fluorescence , organic chemistry , chemistry , layer (electronics) , physics , catalysis
Highly efficient deep blue phosphorescent organic light‐emitting diodes are developed using novel phenylcarbazole‐based phosphine oxide host materials (PPO1 and PPO2). A deep blue phosphorescent dopant, tris((3,5‐difluoro‐4‐cyanophenyl)pyridine) iridium, is doped into PPO1 and PPO2 at a doping concentration of 15% and a high quantum efficiency of 18.4% is obtained with color coordinates of (0.14, 0.15).