Üpping, J.J.ÜppingBielawny, A.A.BielawnyWehrspohn, R.B.R.B.WehrspohnBeckers, T.T.BeckersCarius, R.R.CariusRau, U.U.RauFahr, S.S.FahrRockstuhl, C.C.RockstuhlLederer, F.F.LedererKroll, M.M.KrollPertsch, T.T.PertschSteidl, L.L.SteidlZentel, R.R.Zentel2022-03-042022-03-042011https://publica.fraunhofer.de/handle/publica/22672210.1002/adma.201101419A three-dimensional photonic crystal intermediate reflector for enhanced light trapping in tandem solar cells is presented. The intermediate reflector consists of a transparent and conductive ZnO:Al inverted opal sandwiched in between the top amorphous silicon and bottom microcrystalline silicon cell.en620journal article