Comparative study of defect levels in GaInNAs, GaNAsSb, and GaInNAsSb for high-efficiency solar cells

    Tutkimustuotos: ArtikkeliScientificvertaisarvioitu

    11 Sitaatiot (Scopus)

    Abstrakti

    Background doping and defect levels in GaInNAs, GaNAsSb, and GaInNAsSb solar cells with 1 eV band-gap are reported. Localized point defect induced traps were observed showing broadest defect distribution in GaInNAsSb. Incorporation of Sb reduced the unintentional p-type background doping by an order of magnitude, but increased the capture cross sections of deep levels by three orders of magnitude. The thermal activation energy of the dominating hole trap was increased from 350 meV for GaInNAs to 560 meV for GaNAsSb. Annealing of GaNAsSb solar cells improved the open circuit voltage from 280 mV to 415 mV, owing to the reduction in trap density.

    AlkuperäiskieliEnglanti
    Artikkeli122104
    JulkaisuApplied Physics Letters
    Vuosikerta108
    Numero12
    DOI - pysyväislinkit
    TilaJulkaistu - 21 maalisk. 2016
    OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

    Julkaisufoorumi-taso

    • Jufo-taso 2

    !!ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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