PT Journal AU Lang, M Renz, T Opolka, A Zimmermann, C Krämmer, C Neuwirth, M Kalt, H Hetterich, M TI Impact of the degree of Cu-Zn order in Cu2ZnSn(S,Se)4 solar cell absorbers on defect states and band tails SO Applied physics letters PY 2018 BP Art. EP Nr.: VL 113 IS 3 DI 10.1063/1.5036622 LA english ER