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P‐203: The Improvement of White OLED's Performance
Author(s) -
Nishimura Kazuki,
Kawamura Masahiro,
Jinde Yukitoshi,
Yabunouchi Nobuhiro,
Yamamoto Hiroshi,
Arakane Takashi,
Iwakuma Toshihiro,
Funahashi Masakazu,
Fukuoka Kenichi,
Hosokawa Chishio
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 - 10.1889/1.3069583
Subject(s) - oled , materials science , phosphorescence , optoelectronics , dopant , diode , power consumption , fluorescence , power (physics) , nanotechnology , doping , optics , physics , layer (electronics) , quantum mechanics
We have researched further improvement upon three‐component white OLED devices with using fluorescent materials disclosed in SID'07. The long lifetime over 70,000hr@1,000cd/m 2 maintaining at a high efficiency of 20cd/A was achieved by optimization of a carrier balance with using new carrier transport materials. Performance of blue and red OLEDs were also developed in order to enhance capability of white OLEDs, respectively. A long lifetime of 50,000hr@1,000cd/m 2 was achieved by a new light blue dopant BD‐5. Meanwhile, we studied phosphorescent materials for the red device to progress towards further low power consumption. A low driving voltage of 4.4V at 10mA/cm 2 and a long lifetime of 100,000hr@1,000cd/m 2 were realized by employing a new host material and new carrier transport materials. These materials will contribute to large‐Size OLED TVs with color filter method or lighting application for practical use.