@article {Gokmen2013, title = {Band tailing and efficiency limitation in kesterite solar cells}, journal = {Applied Physics Letters}, volume = {103}, year = {2013}, pages = {103506}, doi = {10.1063/1.4820250}, url = {http://dx.doi.org/10.1063/1.4820250}, author = {Tayfun Gokmen and Oki Gunawan and Teodor K. Todorov and David B. Mitzi} }