This title appears in the Scientific Report : 2002 

Silicon-germanium without band-gap grading as red-absorber for highly efficient tandem solar cells
Feng, Y.
Lundszien, D. / Vetterl, O. / Lambertz, A. / Zhu, M. / Finger, F.
Institut für Photovoltaik; IPV
PV in Europe. - WIP Munich & ETA Florence, Rome, 2002. - S. 212
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