Home News Press Releases The role of Sodium for the Enhancement of Solar Cells Publications of Georg Kresse All genres Journal Article (1) Journal Article (1) 1. Journal Article Freysoldt, C.; Grabowski, B.; Hickel, T.; Neugebauer, J.; Kresse, G.; Janotti, A.; Van de Walle, C. G.: First-principles calculations for point defects in solids. Reviews of Modern Physics 86 (1), 253 (2014) MPG.PuRe DOI