Properties of TiO2-based transparent conducting oxides

Taro Hitosugi, Naoomi Yamada, Shoichiro Nakao, Yasushi Hirose, Tetsuya Hasegawa

    Research output: Contribution to journalArticlepeer-review

    147 Citations (Scopus)


    The development and properties of titanium dioxide (TiO2)- based transparent conducting oxides (TCO), which exhibit properties comparable to those of In2-xSnxO3 (ITO), are reviewed in this article. An epitaxial thin film of anatase Ti0.94Nb 0.06O2 exhibited a resistivity (r) of 2.3×10- 4ωcm and internal transmittance of ̃95% in the visible light region. Furthermore, we prepared polycrystalline films with r of 6.4×10-4ωcm at room temperature on glass substrates by using sputtering. We focus on characteristics unique to TiO2- based TCO, such as a high refractive index, high transmittance in infrared, and high stability in reducing atmospheres. Possible applications of TiO2-based TCOs, as well as the mechanism of the transparent conducting properties found in this d-electronbased TCO, are discussed in this review. (Figure Presented) Photograph showing TiO2-based TCO on a transparent plastic film. Note that the film appears greenish due to interference in the film originating from its high refractive index. This high refractive index is one of the unique characteristics of TiO2- based TCO.

    Original languageEnglish
    Pages (from-to)1529-1537
    Number of pages9
    JournalPhysica Status Solidi (A) Applications and Materials Science
    Issue number7
    Publication statusPublished - 2010 Jul


    • Electrical properties
    • Optical properties
    • PLD
    • Sputter
    • Structure
    • Transparent conducting oxide

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Electrical and Electronic Engineering
    • Materials Chemistry


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