Electrochemically deposited photoactive CdIn2Se4 thin films: Structural and optical studies |
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Authors: | Ju-Hyun Ahn |
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Institution: | Inorganic Nano-Materials Laboratory, Department of Chemistry, Hanyang University, Sungdong-Ku, Haengdang 17, Seoul 133-791, Republic of Korea |
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Abstract: | Electrochemical synthesis of photoactive cadmium-indium-selenide (CdIn2Se4) thin films at ambient temperature was reported. The nanocrystalline nature and 1:2:4 elemental chemical stoichiometric ratio for Cd, In and Se were obtained from the X-ray diffraction and energy dispersive X-ray analysis, respectively. Irregular shaped islands of about 400-500 nm in sizes composed of large number of small (∼30-40 nm) spherical grains were confirmed from the atomic force microscopy and the scanning electron microscopy images. The photoelectrochemical measurement of CdIn2Se4 film electrode in presence of 1 M polysulphide electrolyte revealed 0.42% photoelectrochemical device conversion efficiency, under the light illumination intensity of 80 mW/cm2. |
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Keywords: | Electrochemical synthesis CdIn2Se4 thin films XRD SEM AFM Photoelectrochemical cell |
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