Home News Short News Dr. Tim M. Schwarz receives Borchers Badge from RWTH Aachen University Publications of Michael Powalla All genres Journal Article (1) Journal Article (1) 1. Journal Article Laemmle, A.; Wuerz, R.; Schwarz, T.; Cojocaru-Mirédin, O.; Choi, P.-P.; Powalla, M.: Investigation of the diffusion behavior of sodium in Cu(In,Ga)Se2 layers. Journal of Applied Physics 115 (15), 154501 (2014) MPG.PuRe DOI