Electronic band structure of transparent conductor: Nb-doped anatase TiO2

Taro Hitosugi, Hideyuki Kamisaka, Koichi Yamashita, Hiroyuki Nogawa, Yutaka Furubayashi, Shoichiro Nakao, Naoomi Yamada, Akira Chikamatsu, Hiroshi Kumigashira, Masaharu Oshima, Yasushi Hirose, Toshihiro Shimada, Tetsuya Hasegawa

    Research output: Contribution to journalArticlepeer-review

    64 Citations (Scopus)

    Abstract

    We have investigated electronic band structure of a transparent conducting oxide, Nb-doped anatase TiO2 (TNO), by means of firstprinciples band calculations and photoemission measurements. The band calculations revealed that Nb 4d orbitais are strongly hybridized with Ti 3d ones to form a d-nature conduction band, without impurity states in the in-gap region, resulting in high carrier density exceeding 1021 cm-3 and excellent optical transparency in the visible region. Furthermore, we confirmed that the results of valence band and corelevel photoemission measurements are consistent with prediction by the present band calculations.

    Original languageEnglish
    Pages (from-to)1112031-1112033
    Number of pages3
    JournalApplied Physics Express
    Volume1
    Issue number11
    DOIs
    Publication statusPublished - 2008 Nov

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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