Research and Development
About
Development of Phosphorescent White OLED
with Extremely High Power Efficiency and Long Lifetime
Tomoyuki Nakayama, Kunimasa Hiyama, Keiichi Furukawa, and Hirofumi Ohtani
Konica Minolta Technology Center, Inc., Display Technology R&D Laboratories,
Abstract
We developed white OLED device with extremely high power efficiency and long Lifetime, in which blue, yellow-green and red phosphorescent emitters were used. The performance achieved was 64lm/W, and 10000 hours of Lifetime at initial luminance of 1000cd/m2 with light out-coupling technique. New technologies, such as blue phosphorescent materials and sophisticated organic layer structure, were applied to the device. The device also exhibited good durability such as storage stability, which is important performance in practical use. We hope that the development discussed in this paper opens up a course to practical use of OLED in lighting sources for illumination use, backlights and others.
(Details of this paper was presented at SID 2007.)
