Enhanced photovoltaic performance of solution-processed Sb2Se3 thin film solar cells by optimizing device structure.

Thin-film solar cells have attracted worldwide attention due to their high efficiency and low cost. Antimony selenide (Sb 2 Se 3) is a promising light absorption material candidate for thin-film solar cells due to its suitable band gap, abundance, low toxicity, and high chemical stability. Herein, we fabricate an Sb 2 Se 3 thin film solar cell using a simple hydrazine solution process. By controlling the thickness of the photoactive layer and inserting a poly(3-hexylthiophene) hole-transporting layer, an Sb 2 Se 3 solar cell with a power conversion efficiency of 2.45% was achieved. To improve high-efficiency Sb 2 Se 3 thin-film solar cells, an n-i-p structure was designed using the optimized thickness control of the light absorption layer and a poly(3-hexylthiophene) hole-transporting layer. Image 1 • As the photoactive layer of solar cell, Sb 2 Se 3 thin-films were fabricated using solution process. • The thickness of the Sb 2 Se 3 photoactive layer was optimized by repeating the deposition process. • Improved efficiency of Sb 2 Se 3 solar cell was achieved by introducing poly(3-hexylthiophene) as a hole-transporting layer. [ABSTRACT FROM AUTHOR]