Hybrid solar cells from Sb2S3 nanoparticle ink

•Sb2S3 nanoparticles with different sizes were fabricated by hot injection methods, using various ligands.•Effects of ligands on the performance of hybrid solar cell was studied.•Use of low boiling point ligand proofed to be advantageous in being easily removed by annealing.

Sb2S3 is a promising candidate for solar cell absorbers due to its high absorption coefficient, suitable band gap and earth-abundant constituents. Here we present the preparation of hybrid solar cells from an ink of colloidal Sb2S3 nanoparticles and P3HT. Colloidal Sb2S3 nanoparticles were prepared via hot injection method. Solar cells based on these nanoparticles achieves a power conversion efficiency of 1.5%, which is efficiency record for planar hybrid solar cells based on Sb2S3 nanoparticles. We investigated in detail the role of the capping agents on the performance of solar cells.