19% Efficiency Module Based on Roth&Rau Heterojunction Solar Cells and Day4™ Energy Module Concept

P. Papet, R. Efinger, B. Bram Sadlik, Y. Andrault, D. Bätzner, D. Lachenal, B. Strahm, G. Wahli, F. Wuensch, W. Frammelsberger, W. Stein, L. Rubin, W. Schmutz, A. Buechel & B. Rau