TY - GEN A1 - Handick, Evelyn A1 - Reinhard, Patrick A1 - Alsmeier, Jan Hendrik A1 - Köhler, Leonard A1 - Pianezzi, Fabian A1 - Krause, Stefan A1 - Gorgoi, Mihaela A1 - Ikenaga, Eiji A1 - Koch, Norbert A1 - Wilks, Regan G. A1 - Bücheler, Stephan A1 - Tiwari, Ayodhya N. A1 - Bähr, Marcus T1 - Potassium postdeposition treatment-induced band gap widening at Cu(In,Ga)Se₂ surfaces − Reason for performance leap? T2 - ACS Applied Materials & Interfaces Y1 - 2015 U6 - https://doi.org/10.1021/acsami.5b09231 SN - 1944-8244 SN - 1944-8252 VL - 7 IS - 49 SP - 27414 EP - 27420 ER -