Effects of surface barrier layer in AlGaAs/GaAs solar cells

Hiroyuki Urabe, Makoto Kuramoto, Tomohiro Nakano, Atsushi Kawaharazuka, Toshiki Makimoto, Yoshiji Horikoshi

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    4 Citations (Scopus)

    Abstract

    In this paper, we report the effects of surface barrier layers on the characteristics of AlGaAs/GaAs solar cells. The external quantum efficiency (EQE) spectra for AlGaAs barrier samples with different barrier layer AlAs fractions and thickness of the surface barrier layer were measured to increase the solar cell efficiency. The results show that the surface barrier layer is effective to block diffusing photoexcited electrons to the surface while the thicker barrier layer absorbs higher energy photons to generate carriers which recombine at the surface. The optimal surface barrier structure is a 50 nm thick Al0.7Ga0.3As.

    Original languageEnglish
    Pages (from-to)330-332
    Number of pages3
    JournalJournal of Crystal Growth
    Volume425
    DOIs
    Publication statusPublished - 2015 Jun 20

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    Keywords

    • A3. MBE
    • A3. Solar cells
    • B1. GaAs
    • Surface barrier

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Materials Chemistry
    • Inorganic Chemistry

    Cite this

    Urabe, H., Kuramoto, M., Nakano, T., Kawaharazuka, A., Makimoto, T., & Horikoshi, Y. (2015). Effects of surface barrier layer in AlGaAs/GaAs solar cells. Journal of Crystal Growth, 425, 330-332. https://doi.org/10.1016/j.jcrysgro.2015.02.097