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    Area of Science:

    • Materials Science
    • Solid State Physics

    Context:

    • Thin-film solar cells are crucial for renewable energy.
    • Copper Indium Gallium Diselenide (CIGS) is a promising photovoltaic material.
    • Efficient and scalable fabrication methods are needed for CIGS.

    Purpose:

    • To develop a low-cost, scalable electrodeposition method for CIGS precursor films.
    • To optimize high-temperature selenization for high-quality CIGS film formation.
    • To characterize the structural, morphological, and optical properties of electrodeposited CIGS films.

    Summary:

    • Potentiostatic electrodeposition was used to create CIGS precursor films on ITO glass.
    • High-quality CIGS films were achieved through high-temperature argon selenization.
    • Characterization confirmed preferential (112) orientation, pure chalcopyrite phase, and tunable bandgap with Ga concentration.

    Impact:

    • Electrodeposition provides a cost-effective, industrially scalable alternative to sputtering for CIGS production.
    • The fabricated CIGS films exhibit high crystallinity, near-stoichiometry, and superior light absorption.
    • These findings support the application of CIGS in efficient bifacial solar cells.