Amorphous Cu–In–S Nanoparticles as Precursors for CuInSe2 Thin-Film Solar Cells with a High Efficiency

Authors

  • Dr. SeJin Ahn,

    1. Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739
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  • Yoo Jeong Choi,

    1. Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739
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  • Kyunhwan Kim,

    1. Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739
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  • Dr. Young-Joo Eo,

    1. Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739
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  • Ara Cho,

    1. Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739
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  • Dr. Jihye Gwak,

    1. Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739
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  • Dr. Jae Ho Yun,

    1. Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739
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  • Dr. Keeshik Shin,

    1. Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739
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  • Dr. Seoung Kyu Ahn,

    1. Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739
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  • Dr. Kyunghoon Yoon

    Corresponding author
    1. Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739
    • Solar Energy Department, Korea Institute of Energy Research, 71-2 Jangdong, Yuseonggu, Daejeon (Korea), Fax: (+)82-42-860-3739

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Abstract

CuInSe2 (CISe) absorber layers for thin-film solar cells were fabricated through the selenization of amorphous Cu–In–S nanoparticles, which were prepared by using a low-temperature colloidal process within one minute without any external heating. Two strategies for obtaining highly dense CISe absorber films were used in this work; the first was the modification of nanoparticle surface through chelate complexation with ethanolamine, and the second strategy utilized the lattice expansion that occurred when S atoms in the precursor particles were replaced with Se during selenization. The synergy of these two strategies allowed formation of highly dense CISe thin films, and devices fabricated using the absorber layer demonstrated efficiencies of up to 7.94 % under AM 1.5G illumination without an anti-reflection coating.

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