CHARGE TRANSPORT MATERIAL AND ORGANIC ELECTRONICS ELEMENT

• Main Authors: UCHIYAMA TOMOMI, ISHITSUKA KENICHI, SUGIOKA TOMOTSUGU, SAKUMA HIROTAKA, FUKUSHIMA IORI, KAMO KAZUYUKI, KODAMA SHUNSUKE, MORIYAMA RYOTA, HONNA RYO
• Format: Patent
• Language: English; Japanese
• Published: 24.10.2019
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; SEMICONDUCTOR DEVICES; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a charge transport material capable of prolonging the life of organic electronics element.SOLUTION: A charge transport material contains a charge transport branch polymer satisfying following conditions. The charge transport material is composed of a charge transport branch polymer, and when making an organic layer of 10-200 nm thick having a current-carrying area of 0.032 cmgenerate excitons of 1×10or more by irradiation with light while feeding a constant current of 2-30 mA/cmby applying an electric field, the difference (application voltage V2 - application voltage V1) of the application voltage V1 immediately after start of irradiation with light, and the application voltage V2 after generating excitons of 1×10or more is 20,000 V/cm or less.SELECTED DRAWING: None 【課題】有機エレクトロニクス素子の寿命を延ばすことができる電荷輸送性材料を提供すること。【解決手段】下記を満たす電荷輸送性分岐ポリマーを含有する、電荷輸送性材料。電荷輸送性分岐ポリマーからなり、厚さが１０〜２００ｎｍであり、通電面積が０．０３２ｃｍ２である有機層に、電界を印加して２〜３０ｍＡ／ｃｍ２の定電流を流しながら、光を照射して１×１０１８個以上の励起子を発生させた場合に、光の照射を開始した直後の印加電界Ｖ１と、１×１０１８個以上の励起子を発生させた後の印加電界Ｖ２との差（印加電界Ｖ２−印加電界Ｖ１）が、２０，０００Ｖ／ｃｍ以下である。【選択図】なし