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1 results

  • Transparent p- and n-Type Conductive Oxides With Delafossite Structure

  • Hiroshi Yanagi, Kazushige Ueda, Shuntaro Ibuki, Tomomi Hase, Hideo Hosono, Hiroshi Kawazoe
  • Journal:
    MRS Online Proceedings Library Archive / Volume 623 / 2000
    Published online by Cambridge University Press:
    10 February 2011, 235
    Print publication:
    2000

  • Thin films of CuAlO2, CuGaO2 and AglnO2 with delafossite structure were prepared on sapphire substrates by pulsed laser deposition method. The resulting CuA102 thin films exhibited p-type conduction and the electrical conductivity at room temperature was 0.3 Scm−1. CuGaO2 thin films were grown epitaxially on μ-Al2O3 (001) surface and showed p-type conduction (conductivity at room temperature = 0.06 S cm−1). The optical band gap was estimated to be ∼3.5 eV for CuAlO2 or ∼3.6 eV for CuGaO2. On the other hand, the thin film of Sn doped AglnO2 exhibited n-type conduction. The optical band gap and electrical conductivity at room temperature were ∼4.1 eV and 70 S cm−1, respectively. The recent work demonstrates the validity of our chemical design concept for p- and n-type transparent conducting oxides, providing an opportunity for realization of transparent p-n junction using delafossite-type oxides.