Defect studies in Cu2ZnSnSe4 and Cu2ZnSn(Se0.75S0.25)4 by admittance and photoluminescence spectroscopyKask, Erkki; Grossberg, Maarja; Josepson, Raavo; Salu, Pille; Timmo, Kristi; Krustok, JüriMaterials science in semiconductor processing2013 / p. 992-996 : ill Microphotoluminescence study of Cu2ZnSnS4 polycrystalsGrossberg, Maarja; Salu, Pille; Raudoja, Jaan; Krustok, JüriJournal of photonics for energy2013 / p. 030599-1 - 030599-6 : ill Talveakadeemia 2014 : teaduslikud lühiartiklid : kogumik = Winteracademy 2014 : scientific articles : publications2014