The research group led by Professor Junji Todo of the Organic Electronics Research Center of Yamagata University in Japan has successfully developed a technology for manufacturing organic EL elements using printing technology. Compared with the existing vacuum evaporation technology, the power consumption of this printing technology can be reduced to less than one percent, greatly reducing production costs.
Existing organic EL elements use vacuum evaporation technology to evaporate several layers of compounds ranging from several nanometers to tens of nanometers on the substrate, especially the electron injection layer must evaporate metal and insulating materials in a vacuum environment, which is difficult to achieve using printing technology.
The research team of Prof. Junji Jodo developed a new type of polymer composite material called "polyvinyl phenylpyridine", which can form a thin film by spraying and other printing techniques in a general environment instead of the compound formed by vacuum evaporation. In order to maintain the vacuum environment and the temperature during vapor deposition, the vacuum vapor deposition method consumes a lot of power. At the same time, vacuum vapor deposition is not suitable for the manufacture of large-scale EL elements. This new technology has greatly reduced the cost and opened up large-scale Manufacturing methods of organic EL elements.
This technology has been adopted by the Japan Science and Technology Promotion Agency's "Manufacturing Flexible Organic EL Lighting Elements Using Printing Methods" project, and related scientific research results were published at the Japan Society of Applied Physics held on September 11.
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