Home News Press Releases The role of Sodium for the Enhancement of Solar Cells Publications of Yuping He All genres Journal Article (1) Journal Article (1) 1. Journal Article Wippermann, S. M.; He, Y.; Vörös, M.; Galli, G.: Novel silicon phases and nanostructures for solar energy conversion. Applied Physics Reviews 3 (4), 040807 (2016) MPG.PuRe DOI