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INFLUENCE OF ANNEALING TEMPERATURE ON SOME OPTICAL AND STRUCTURAL PROPERTIES OF Cu2ZnSnS4 DEPOSITED BY CZT CO-ELECTRODEPOSITION COUPLED WITH CHEMICAL BATH TECHNIQUE

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  • OBILA JORIM OKOTH

    (Department of Physics, School of Physical Sciences, University of Nairobi, Kenya)

  • DINFA LUKA DOMTAU

    (Department of Physics, School of Physical Sciences, University of Nairobi, Kenya†Department of Physics, Faculty of Natural Sciences, University of Jos, Nigeria)

  • MUKABI MARINA

    (#x2021;Department of Chemistry, School of Physical Sciences, University of Nairobi, Kenya)

  • ONYATTA JOHN

    (#x2021;Department of Chemistry, School of Physical Sciences, University of Nairobi, Kenya)

  • OGACHO ALEX AWUOR

    (Department of Physics, School of Physical Sciences, University of Nairobi, Kenya)

Abstract

Copper indium gallium selenide (CIGS) is currently most efficient thin film solar technology in use but it is faced with problems of material scarcity and toxicity. An alternative earth abundant and non-toxic materials consisting of Cu2ZnSnS4 (CZTS) have been investigated as a replacement for CIGS. In this work, CZTS thin films deposited by low cost co-electrodeposition, at a potential of −1.2V, coupled with chemical bath techniques at room temperature and then annealed under sulphur rich atmosphere were investigated. CZTS thin film quality determination was carried out using Raman spectroscopy which confirmed formation of quality CZTS film, main Raman peaks at 288cm−1 and 338cm−1 were observed. Electrical characterization was carried out using four-point probe instrument and the resistivity was in the order of ∼10−4Ω-cm. The optical characterization was done using UV-VIS-NIR spectrophotometer. The bandgaps of the annealed CZTS film ranged from 1.45 to 1.94eV with absorption coefficient of order ∼104cm−1 in the visible and near infrared range of the solar spectrum were observed.

Suggested Citation

  • Obila Jorim Okoth & Dinfa Luka Domtau & Mukabi Marina & Onyatta John & Ogacho Alex Awuor, 2018. "INFLUENCE OF ANNEALING TEMPERATURE ON SOME OPTICAL AND STRUCTURAL PROPERTIES OF Cu2ZnSnS4 DEPOSITED BY CZT CO-ELECTRODEPOSITION COUPLED WITH CHEMICAL BATH TECHNIQUE," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 25(03), pages 1-6, April.
    • Handle: RePEc:wsi:srlxxx:v:25:y:2018:i:03:n:s0218625x18500750
    DOI: 10.1142/S0218625X18500750
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