%0 Conference Paper %B 14th European PVSEC %D 1997 %T Heterojunctions based on Cu2ZnSnS4 and Cu2ZnSnSe4 thin films %A Friedlmeier, Th Magorian %A Wieser, N %A Walter, Th %A Dittrich, H %A Schock, HW %B 14th European PVSEC %G eng