[N-5-4] Gold-Free Fully Cu-Metallized InGaP/InGaAs/Ge multi-junction solar cell C.H. Hsu1, H.J. Chang1, H.W. Yu1, H.Q Nguyen1, E.Y. Chang1 (1.National Chiao-Tung Univ. (Taiwan)) https://doi.org/10.7567/SSDM.2013.N-5-4