Charge transporting block copolymer for morphological control in light emitting device based on polymer blends |
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| Authors: | Kousuke Tsuchiya Kota Sakaguchi Akira Kawakami Hideo Taka Hiroshi Kita Takeshi Shimomura Kenji Ogino |
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| Affiliation: | 1. Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei-shi, Tokyo 184-8588, Japan;2. Display Technology R&D Laboratories, Konica Minolta Technology Center Inc., 2970 Ishikawa-machi, Hachioji-shi, Tokyo 192-8505, Japan |
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| Abstract: | Bipolar charge transporting block copolymer composing of carbazole and oxadiazole monomers as hole and electron transporting units, respectively, was synthesized by nitroxide mediated radical polymerization. It is found that the current efficiency significantly increased with the addition of the block copolymer in the device based on polymer blend system. AFM measurement revealed that a phase-separated structure in the polymer blend layer changed to suitable morphology in the presence of block copolymer. |
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