Development of a phosphorescent white OLED with extremely high power efficiency and long lifetime |
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Authors: | Tomoyuki Nakayama Kunimasa Hiyama Keiichi Furukawa Hirofumi Ohtani |
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Affiliation: | Konica Minolta Technology Center, Inc., Advanced Materials Technolgy R&D Laboratories, 2970 Ishikawa‐machi, Hachioji‐shi, Tokyo 192‐8505, Japan |
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Abstract: | Abstract— A white OLED device with extremely high power efficiency and long lifetime was developed, in which blue, yellow‐green, and red phosphorescent emitters were used. The performances achieved were 64 lm/W and 10,000 hours of lifetime at an initial luminance of 1000 cd/m2 by using a light outcoupling technique. The device also exhibited the good durability important for practical usage. New technologies, such as blue phosphorescent materials and a sophisticated organic layer structure, were applied to the device. Hopefully, these technologies will open the door to the practical use of OLEDs as light sources. |
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Keywords: | Active‐matrix liquid‐crystal display (AMLCD) avionics light‐emitting diode (LED) backlight |
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