Organic Light-Emitting Diode with Highly Ordered Polycrystalline Thin Film

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概要

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• We investigate organic light-emitting diodes with a polycrystalline thin film of a calamitic liquid-crystalline material. Compared to a non-liquid-crystalline material, the polycrystalline films fabricated via the liquid-crystalline phase showed high electrical current and light emission from an emissive dye dopant, in spite of a film thickness of over 1 μm. Judging from the X-ray diffraction patterns and polarized optical microscope images, well-controlled parallel molecular orientation and suppression of grain boundaries were achieved only in the liquid-crystalline material owing to the molecular orientation controllability of the liquid-crystalline materials. We conclude that the liquid-crystalline materials can be a good candidate for a polycrystalline organic semiconductor for not only thin-film transistors but also light-emitting diodes and solar cells.

• 2013-05-25

著者

• Hanna Jun-ichi

  Imaging Science & Engineering Laboratory Tokyo Institute Of Technology

• Takayashiki Yukiko

  Imaging Science And Engineering Laboratory Tokyo Institute Of Technology

• Nakano Kyohei

  Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan

• Iino Hiroaki

  Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan

• Kobori Takeo

  Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan

• Iino Hiroaki

  Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, J1-2, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

• NAKANO Kyohei

  Imaging Science and Engineering Laboratory, Tokyo Institute of Technology

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