Novel structure of organic electroluminescence cells with conjugated oligomers

• Chishio Hosokawa

  Central Research Laboratories, Idemitsu Kosan Co., Ltd., 1280 Kami-izumi, Sodegaura, Chiba 299-02, Japan

• Hisahiro Higashi

  Central Research Laboratories, Idemitsu Kosan Co., Ltd., 1280 Kami-izumi, Sodegaura, Chiba 299-02, Japan

• Tadashi Kusumoto

  Central Research Laboratories, Idemitsu Kosan Co., Ltd., 1280 Kami-izumi, Sodegaura, Chiba 299-02, Japan

抄録

Organic electroluminescence (EL) cells with a novel structure, ITO/semiconducting oligothiophene layer/oligophenylene layer/emitting layer/Mg:Ag, were studied. The oligothiophene layer enhanced hole injection and hole transport into the emitting layer (EML), while the oligophenylene layer achieved electron confinement in EML by electron blocking. In addition, we found that the oligophenylene layer inhibited energy transfer from EML to the oligothiophene layer and played an important role in increasing the luminous efficiency. For our fabricated EL cell with tris(8-hydroxyquinoline)aluminum as an emitting molecule, we succeeded in obtaining bright emission over 2000 cd/m2 at a voltage of about 10 V.

収録刊行物

• Applied Physics Letters

  Applied Physics Letters 62 (25), 3238-3240, 1993-06-21

  AIP Publishing

キーワード

• Physics and Astronomy (miscellaneous)

詳細情報

• CRID: 1361137046504324864
• NII論文ID: 30015763576
• DOI: 10.1063/1.109085
• ISSN: 10773118
• ISSN: 00036951
• Web Site: https://pubs.aip.org/aip/apl/article-pdf/62/25/3238/18496230/3238_1_online.pdf
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