Solar cells can transform light energy into electrical energy, possibly removing the need for fossil fuel energy resources. Reflection loss in solar cells is a factor contributing to diminished power conversion efficiency, which can be solved through using antireflective coatings on the cell surface. The present research primarily focuses on the development and application of antireflection coatings on the top surface of silicon solar cells. Sb2Se3 was deposited over multi-crystalline Si cells with different durations from 15 to 60 minutes. The influence of thin film Sb2Se3 coated cells was investigated through optical, current, voltage and thermal study. The ideal thickness of the Sb2Se3 coating was determined to be 1.336 µm for SB3 sample using FESEM. The lowest optical reflectance of 5.8% and highest absorbance of 93.4% was reached after 45 minutes of coating (SB3) across the 300 to 1200 nm wavelength band. The minimum electrical resistivity of a 45-minute coated Sb2Se3 sample was determined as 5.09×10−3 Ω-cm. The improved power conversion efficiency of Sb2Se3 coated solar cell under open sunlight setting was increased from 15.31 to 21.18% particularly for SB3 solar cell sample,
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