Authors : Mohammed Hamid, Bushra H. Hussein and Iman H. Khudayer
Abstract: CuAlSe2 (CAS) thin films polycrystalline structure deposited by thermal evaporation at RT with 2 thickness (500±20) nm then doped with antimony (Sb) with ratios (X = 0.0, 0.01, 0.03 and 0.05) to study the (structural, optical and electrical) properties. The crystal structure of alloy and thin film carried out tests X-Ray Diffraction (XRD), it found (Tetragonal) and has a polycrystalline orientation prevalent (112). It was also from (EDX-Energy Dispersive of X-rays) to make sure the weight ratios of alloy match them with the prepared ratios. From AFM images can calculated roughness and average diameter. The optical properties measurements showed that the thin films (CAS) have high absorbance in the visible region wavelengths of (400-700 nm). The energy gap was the allowed direct transition, the energy gap decreased with doped. The hall effect results showed that all thin films have (p-type). By use thermal evaporation technology in vacuum, a solar cell where manufactured from heterojunction (p-CuAlSe2) which achieved by the deposition of the composite alloy 2 thin films (CIS) with deferent ratios on a single crystal silicon substrate with direction (111) of the (n-type). The illumination (current-voltage) characteristics showed that the solar cell with thin films (t = 500 nm and X = 0.05) has highest efficiency (η = 5.89%).
Mohammed Hamid, Bushra H. Hussein and Iman H. Khudayer, 2018. Effect of Sb Doping on CuAlSe2 Thin Films and Their Behavior on the Preparation of CuAlSe2/Si Heterojunction Solar Cells. Journal of Engineering and Applied Sciences, 13: 10533-10539.