@article {64958,
	title = {Graded band-gap engineering for increased efficiency in CZTS solar cells},
	journal = {Optical materialsOptical Materials},
	volume = {76},
	year = {2018},
	month = {2018},
	pages = {393-399},
	isbn = {0925-3467},
	author = {Ferhati, H and Djeffal, F}
}
