The growth of AgGaTe<inf>2</inf> layers on glass substrates with Ag<inf>2</inf>Te buffer layer by closed space sublimation method

Aya Uruno, Ayaka Usui, Yuji Takeda, Tomohiro Inoue, Masakazu Kobayashi

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    The AgGaTe<inf>2</inf> layer growth was performed by the closed space sublimation method on the Mo/glass substrate. The Ag<inf>2</inf>Te buffer layer was inserted between AgGaTe<inf>2</inf> and Mo layers, to improve the quality of grown layers. Crystallographic properties were analyzed by x-ray diffraction (XRD), and the surface morphologies were analyzed by scanning electron microscopy (SEM). The Ag<inf>2</inf>Te layer grown on the Mo/glass exhibited a membrane filter structure from the SEM observation. XRD spectra of layers grown with and without the buffer layer were compared. The AgGaTe<inf>2</inf> layer with the Ag<inf>2</inf>Te buffer layer exhibited peaks originating from AgGaTe<inf>2</inf>, and a very strong diffraction peak of 112 was observed. On the other hand, it was cleared that the layer grown without the buffer layer exhibited no strong peaks associated with AgGaTe<inf>2</inf>, but Ga-Te compounds. From this, crystallographic properties of the AgGaTe<inf>2</inf> layer were drastically improved by the insertion of the Ag<inf>2</inf>Te buffer layer. Moreover, the surface morphology exhibited a smooth surface when the Ag<inf>2</inf>Te buffer layer was inserted. The nucleation site density of AgGaTe<inf>2</inf> was probably increased since the membrane filter structure exhibited numbers of kinks at the edge. Chemical reaction between Ga and Mo was also eliminated. It was cleared that the insertion of the buffer layer and its surface morphology were an important parameter to grow high quality AgGaTe<inf>2</inf> layers.

    Original languageEnglish
    Pages (from-to)508-511
    Number of pages4
    JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
    Volume12
    Issue number6
    DOIs
    Publication statusPublished - 2015 Jun 1

    Keywords

    • AgGaTe2
    • Chalcopyrite
    • Closed space sublimation
    • Mo

    ASJC Scopus subject areas

    • Condensed Matter Physics

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