Open AccessStudy of color-conversion-materials in chromatic-stability white organic light-emitting diodes
Author(s) -
C Li,
Hiroshi Kimura,
Tetsuya Saito,
K. Sakurai,
Bin Wei,
Musubu Ichikawa,
Yoshio Taniguchi
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.014422
Subject(s) - materials science , oled , triphenylamine , dopant , optoelectronics , diode , backlight , layer (electronics) , optics , thermal stability , doping , photoluminescence , light emitting diode , liquid crystal display , chemistry , nanotechnology , physics , organic chemistry
We have fabricated high efficiency white organic light-emitting diodes (WOLEDs) with red-dye doped hole injection layer (HIL) and blue emissive layer. We investigated the carrier transport and photoluminescence efficiency in the device of single-layer HIL with different red dye species, bis(4-diphneylamino-phenyl)-perylene-3-yl-amine, 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9enyl)-4Hpyran and a dopant material of fused aromatic ring (P1) provided by Idemitsu Kosan in 4,4',4"-tris[2-naphthyl(phenyl)amino]triphenylamine with a varied concentration. It was found that 25-% wt P1 in HIL has better electro-optical characteristics. Furthermore, we have fabricated three WOLEDs of chromatic-stability with different thickness of HIL layer. High chromatic-stability CCM-WOLEDs have been achieved, which can be applied for lightening and backlight for flat panel display.