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| May 10, 2011 |
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OLED panels with world's Highest Efficiency and Longest Life
using the Wet-Process
— 52 lm/W in the efficiency and 20,000 hours in the brightness half-life — |
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Mitsubishi Chemical Corporation
Pioneer Corporation |
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Mitsubishi Chemical Corporation (Head office: Minato-ku, Tokyo; President: Yoshimitsu Kobayashi; hereafter "Mitsubishi Chemical") and Pioneer Corporation (Head office: Kawasaki-shi, Kanagawa; President: Susumu Kotani; hereafter "Pioneer'') have succeeded in use of a wet-process deposition method to make organic light-emitting diodes that are characterized by the highest light efficiency and longest life thus far achieved anywhere in the world.
Whilst OLED panels generally are made by vapor deposition, but the wet process of deposition is superior in a sense that we can expect a drastic reduction in the cost. Moreover, the wet process is potentially suitable for manufacturing large size panels.
In this context, there has been a high level of interest in taking advantage of the wet process for manufacturing OLED panels. Of particular importance is to employ the wet process for the deposition of the emission layers. Up to this time, however, no successful result has been reported within our knowledge, that succeeded in achieving both a high emission efficiency and a long life.
For this reason, Mitsubishi Chemical and its research affiliate Mitsubishi Chemical Group Science and Technology Research Center, Inc. (Location: Yokohama-shi, Kanagawa; President: Kizo Shibata), together with Pioneer, have been jointly working since January 2010 on developing OLED panels employing the wet-process.
Mitsubishi Chemical has successfully developed the novel materials for the wet process. Using these materials, Mitsubishi Chemical and Pioneer jointly developed in optimizing the wet process resulting in the efficiency of 52 lm/W at the operation condition of 1,000 cd/m2as a white emission, and the half-life of 20,000 hours as of the initial brightness at 1,000 cd/m2. These two performance characteristics are, within our knowledge, the best thus far achieved in the world.
Whilst the light source module for the OLED lighting panel to be launched in July this year by Mitsubishi Chemical will be manufactured by a Pioneer subsidiary, the Tohoku Pioneer Corporation (Head office: Tendo-shi, Yamagata; President, Shunji Shiono) using the wet process for the underlayer and the vapor deposition process for the emission layer and the upper layer, respectively. Mitsubishi Chemical and Pioneer will continue to work on this new technology so that OLED panels using the wet process for the emission layer as well as for the underlayer will be commercialized by 2014.
Reference: Sectional diagram of an OLED element
| For further information, please contact |
Public Relations Department
Mitsubishi Chemical Corporation |
| Tel: [+81] (0)3-6414-3730 |
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Public Relations Department
Corporate Communications Division
Pioneer Corporation |
| Tel: [+81] (0)44-580-1003 |
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