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5.3: New Triazole Derivatives as Hole‐Blocking and Electron‐Transporting Materials for Organic Light‐Emitting Devices
Author(s) -
Ichikawa Musubu,
Fujimoto Soichi,
Koyama Toshiki,
Miki Tetsuzo,
Taniguchi Yoshio
Publication year - 2006
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 - 10.1889/1.2433532
Subject(s) - oled , electroluminescence , triazole , blocking (statistics) , materials science , bilayer , electron , optoelectronics , phosphorescence , quantum efficiency , photochemistry , chemistry , nanotechnology , optics , computer science , organic chemistry , fluorescence , physics , membrane , computer network , biochemistry , layer (electronics) , quantum mechanics
We have demonstrated bipyridyl substituted triazole derivatives (Bpy‐TAZs) as an electron‐transporting material for organic light‐emitting devices (OLEDs). Hybridization of bipyridyl to triazole is a good way to improve electron‐transporting ability of triazoles with keeping good hole‐blocking ability, which is a useful property of triazole derivatives. By employing a new Bpy‐TAZ (Bpy‐TAZ‐03) as a hole‐blocking and electron‐transporting material for phosphorescent OLEDs, lower operation voltage was achieved with keeping the same external quantum efficiency of electroluminescence (almost 10%) as compared with the conventional hole‐blocking and electron‐transporting bilayer consisting of bathocuproine and tris (8‐hydroxyquinolinato) aluminum.