Photoluminescence analysis of Czochralski-grown lanthanum aluminate single crystals

Kotaro Kanai, Eiji Hirata, Yoshimichi Ohki

    研究成果: Article

    10 引用 (Scopus)

    抄録

    Photoluminescence (PL) spectra induced by ultraviolet photons were measured for Czochralski-grown lanthanum aluminate single crystals. Five PL peaks were observed at approximately 1.60, 1.64, 1.675, 2.0, and 2.8 eV at 10K, and the 2.8 eV PL disappears at 300 K. From PL excitation and vacuum ultraviolet absorption measurements, it is found that the 2.8 eV PL arises owing to the excitation of electrons to localized states in the band gap, and that PLs at approximately 1.60, 1.64, and 1.675 eV arise owing to the excitation of electrons to the conduction band. The 2.0 eV PL with a decay profile similar to that of the 2.8 eV PL is assumed to be caused by a process similar to that in the case of the 2.8 eV PL.

    元の言語English
    ページ(範囲)7980-7982
    ページ数3
    ジャーナルJapanese Journal of Applied Physics
    47
    発行部数10 PART 1
    DOI
    出版物ステータスPublished - 2008 10

    Fingerprint

    Lanthanum
    lanthanum
    Photoluminescence
    Single crystals
    photoluminescence
    single crystals
    excitation
    Electrons
    ultraviolet absorption
    Conduction bands
    conduction bands
    Energy gap
    electrons
    Photons
    Vacuum
    vacuum
    photons
    decay
    profiles

    ASJC Scopus subject areas

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

    これを引用

    Photoluminescence analysis of Czochralski-grown lanthanum aluminate single crystals. / Kanai, Kotaro; Hirata, Eiji; Ohki, Yoshimichi.

    :: Japanese Journal of Applied Physics, 巻 47, 番号 10 PART 1, 10.2008, p. 7980-7982.

    研究成果: Article

    @article{7cde7c5cd8b649d1ae15882062e66b00,
    title = "Photoluminescence analysis of Czochralski-grown lanthanum aluminate single crystals",
    abstract = "Photoluminescence (PL) spectra induced by ultraviolet photons were measured for Czochralski-grown lanthanum aluminate single crystals. Five PL peaks were observed at approximately 1.60, 1.64, 1.675, 2.0, and 2.8 eV at 10K, and the 2.8 eV PL disappears at 300 K. From PL excitation and vacuum ultraviolet absorption measurements, it is found that the 2.8 eV PL arises owing to the excitation of electrons to localized states in the band gap, and that PLs at approximately 1.60, 1.64, and 1.675 eV arise owing to the excitation of electrons to the conduction band. The 2.0 eV PL with a decay profile similar to that of the 2.8 eV PL is assumed to be caused by a process similar to that in the case of the 2.8 eV PL.",
    keywords = "Defect, High permittivity, High-k gate dielectric, Lanthanum aluminate, Photoluminescence, Single crystal",
    author = "Kotaro Kanai and Eiji Hirata and Yoshimichi Ohki",
    year = "2008",
    month = "10",
    doi = "10.1143/JJAP.47.7980",
    language = "English",
    volume = "47",
    pages = "7980--7982",
    journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",
    issn = "0021-4922",
    publisher = "Japan Society of Applied Physics",
    number = "10 PART 1",

    }

    TY - JOUR

    T1 - Photoluminescence analysis of Czochralski-grown lanthanum aluminate single crystals

    AU - Kanai, Kotaro

    AU - Hirata, Eiji

    AU - Ohki, Yoshimichi

    PY - 2008/10

    Y1 - 2008/10

    N2 - Photoluminescence (PL) spectra induced by ultraviolet photons were measured for Czochralski-grown lanthanum aluminate single crystals. Five PL peaks were observed at approximately 1.60, 1.64, 1.675, 2.0, and 2.8 eV at 10K, and the 2.8 eV PL disappears at 300 K. From PL excitation and vacuum ultraviolet absorption measurements, it is found that the 2.8 eV PL arises owing to the excitation of electrons to localized states in the band gap, and that PLs at approximately 1.60, 1.64, and 1.675 eV arise owing to the excitation of electrons to the conduction band. The 2.0 eV PL with a decay profile similar to that of the 2.8 eV PL is assumed to be caused by a process similar to that in the case of the 2.8 eV PL.

    AB - Photoluminescence (PL) spectra induced by ultraviolet photons were measured for Czochralski-grown lanthanum aluminate single crystals. Five PL peaks were observed at approximately 1.60, 1.64, 1.675, 2.0, and 2.8 eV at 10K, and the 2.8 eV PL disappears at 300 K. From PL excitation and vacuum ultraviolet absorption measurements, it is found that the 2.8 eV PL arises owing to the excitation of electrons to localized states in the band gap, and that PLs at approximately 1.60, 1.64, and 1.675 eV arise owing to the excitation of electrons to the conduction band. The 2.0 eV PL with a decay profile similar to that of the 2.8 eV PL is assumed to be caused by a process similar to that in the case of the 2.8 eV PL.

    KW - Defect

    KW - High permittivity

    KW - High-k gate dielectric

    KW - Lanthanum aluminate

    KW - Photoluminescence

    KW - Single crystal

    UR - http://www.scopus.com/inward/record.url?scp=62249192744&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=62249192744&partnerID=8YFLogxK

    U2 - 10.1143/JJAP.47.7980

    DO - 10.1143/JJAP.47.7980

    M3 - Article

    AN - SCOPUS:62249192744

    VL - 47

    SP - 7980

    EP - 7982

    JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

    JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

    SN - 0021-4922

    IS - 10 PART 1

    ER -