Effects of compression and controlled selenization on powder-fabricated Cu(In,Ga)Se 2 thin films

Bong Geun Song, Hak Young Ahn, Bo In Park, Hyung Ho Park, Byeong Kwon Ju, Seung Yong Lee, Jong Ku Park, So Hye Cho

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    Cu(In,Ga)Se 2 thin films have been used as a light absorbing layer in high-efficiency solar cells. Among many methods, the powder process for fabricating Cu(In,Ga)Se 2 thin films is advantageous, due to its simplicity and minimal usage of materials. However, Cu(In,Ga)Se 2 layers produced by the powder process often result in high porosity and small grain sizes, which has been a significant barrier to wide application. In this report, we demonstrate that simple compression of the Cu(In,Ga)S 2 powder coat and a cost-efficient selenization using a mixture of Se and Al 2 O 3 can reduce porosity and enlarge the grain size. It is surmised that improved particle packing density in the powder coats, in addition to sintering with a steady supply of Se vapor, synergistically enhances highly sintered Cu(In,Ga)Se 2 thin films.

    Original languageEnglish
    Pages (from-to)158-161
    Number of pages4
    JournalApplied Surface Science
    Volume475
    DOIs
    Publication statusPublished - 2019 May 1

    Bibliographical note

    Funding Information:
    This work was supported by the KIST institutional funding [grant number: 2E28020] and the R&D Convergence Program of NST (National Research Council of Science & Technology) of Republic of Korea [grant number: CAP-16-10-KIMS]].

    Funding Information:
    This work was supported by the KIST institutional funding [grant number: 2E28020 ] and the R&D Convergence Program of NST (National Research Council of Science & Technology) of Republic of Korea [grant number: CAP-16-10-KIMS ]].

    Publisher Copyright:
    © 2018

    Keywords

    • Cu(In
    • Ga)Se
    • Light absorbing layer
    • Photovoltaic materials
    • Powder process
    • Thin films

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Surfaces, Coatings and Films
    • Surfaces and Interfaces

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