Highly Efficient and Multilayered OLEDs Fabricated by Solution-Process

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  • 溶液プロセスによる多積層型有機EL素子の作製と高効率化
  • ヨウエキ プロセス ニ ヨル タセキソウガタ ユウキ EL ソシ ノ サクセイ ト コウコウリツカ

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Abstract

Solution processes such as spin-coating, inkjet-printing, or die-coating for organic light emitting devices (OLEDs) are fascinating due to their potential advantages for a production of large area devices at low cost. One of the key solutions to improving the performance of the devices is stacking of a number of successive layers of different functional materials. This multilayer architecture allows for the separation of the charge-injecting, charge-transporting, and light-emitting functions to different layers, which leads to a dramatic increase in efficiency and lifetime. We have developed various solution-processable OLED materials. In this review, we report our recent studies on fluorescent emitters, phosphorescent emitters, host materials, cross-linkable host materials, and electron injection materials for solution-processed OLEDs.

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