@article {wang2014device, title = {Device characteristics of CZTSSe thin-film solar cells with 12.6\% efficiency}, journal = {Advanced Energy Materials}, volume = {4}, year = {2014}, author = {Wang, Wei and Winkler, Mark T and Oki Gunawan and Tayfun Gokmen and Todorov, Teodor K and Zhu, Yu and Mitzi, David B} }