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Isabella, O. (author), Elshinawy, M.A.A. (author), Solntsev, S. (author), Zeman, M. (author)Superstrate thin-film silicon triple-junction solar cells on 2-D gratings were optimized using opto-electrical modeling. Tuning the thickness of intermediate and back reflectors and the band gap of the middle cell resulted in 17% initial efficiency.conference paper 2012