Investigation of CuGaSe2/CuInSe2 double heterojunction interfaces grown by molecular beam epitaxy

Sathiabama Thiru, Masaki Asakawa, Kazuki Honda, Atsushi Kawaharazuka, Atsushi Tackeuchi, Toshiki Makimoto, Yoshiji Horikoshi

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    8 Citations (Scopus)

    Abstract

    In-situ reflection high-energy electron diffraction (RHEED) observation and X-ray diffraction measurements were performed on heterojunction interfaces of CuGaSe2/CnInSe2/CuGaSe2 grown on GaAs (001) using migration-enhanced epitaxy. The streaky RHEED pattern and persistent RHEED intensity oscillations caused by the alternate deposition of migration-enhanced epitaxy sequence are observed and the growths of smooth surfaces are confirmed. RHEED observation results also confirmed constituent material interdiffusion at the heterointerface. Cross-sectional transmission electron microscopy showed a flat and abrupt heterointerface when the substrate temperature is as low as 400 °C. These have been confirmed even by X-ray diffraction and photoluminescence measurements.

    Original languageEnglish
    Article number027120
    JournalAIP Advances
    Volume5
    Issue number2
    DOIs
    Publication statusPublished - 2015 Feb 1

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    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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