Solar cells fabricated by spray pyrolysis deposited Cu2CdSnS4 thin films

Cu2ZnSnS4 (CZTS) occurs in nature and is the most likely alternative to Cu(In,Ga)Se-2 (CIGS) thin film solar cells, which started to spread increasingly all over the world. CZTS is a very suitable absorber layer material for thin film solar cells due to containing cheap material. It has a 1.5 eV band gap that is appropriate for theoretical Shockley-Queisser limit values, and the large absorption coefficient (10(4) cm(-1)). Substitution of different metals and usage of low cost and easy controlled deposition systems may present advantages.