Solution-processed Cu2CdSn(S,Se)4 thin film solar cells

Cu 2 CdSn(S,Se) 4 is an important candidate material for thin film solar cell absorber layers . In this work, low-cost Cu 2 CdSnS 4 nanocrytal thin film with a stannite structure has been successfully fabricated by a butyldithiocarbamate-based ethanol solution approach. The selenized Cu 2 CdSn(S,Se) 4 thin film shows large densely packed grains and has a suitable band gap value of 1.01   eV. The Cu 2 CdSn(S,Se) 4 thin film solar cell with a proof-of-concept power conversion efficiency of 3.1% was fabricated.