@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}
}
@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}
}
