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P‐226: New Tris Bipyridyl Derivative as Hole‐Blocking and Electron‐Transporting Materials for Organic Light‐Emitting Devices
Author(s) -
Ichikawa Musubu,
Wakabayashig Kenta,
Yokoyama Norimasa,
Koyama Toshiki,
Taniguchi Yoshio
Publication year - 2008
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 - 10.1889/1.3069608
Subject(s) - oled , phosphorescence , blocking (statistics) , optoelectronics , materials science , diode , quantum efficiency , layer (electronics) , phosphorescent organic light emitting diode , electron , electron hole , optics , nanotechnology , fluorescence , computer science , physics , computer network , quantum mechanics
We demonstrate that tris bipyridyl benzene (TbpyB) works well as an electron transporting and hole‐blocking material for organic light‐emitting diodes. Using TbpyB for phosphorescent organic light‐emitting diodes (OLEDs), we can obtain comparable high external quantum efficiency and a lower operation voltage without any additional hole‐blocking layer that must be needed usually. In other words, the TbpyB layer worked as a double functioned (hole‐blocking and electron‐transporting) layer, and TbpyB provides more simple fabrications of phosphorescent OLEDs that work at a lower power consumption.