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Fischer, S.; Goldschmidt, J.C.; Löper, P.; Bauer, G.H.; Brüggemann, R.; Krämer, K.; Biner, D.; Hermle, M.; Glunz, S.W. (2010). Enhancement of silicon solar cell efficiency by upconversion: Optical and electrical characterization. Journal of applied physics, 108(4), p. 44912. Melville, N.Y.: American Institute of Physics 10.1063/1.3478742

Goldschmidt, J.C.; Fischer, S.; Löper, P.; Krämer, K.W.; Biner, D.; Hermle, M.; Glunz, S.W. (2010). Upconversion to enhance silicon solr cell efficiency - detailed experimental analysis with both coherent monochromatic irradiation and white light illumination. In: Proceedings of the 25th Eur. Photovoltaic Solar Energy Conf. and 5th World Conf. on Photovoltaic Energy Conversion, 09/2010, Valencia, Spain.

Löper, P.; Goldschmidt, J.C.; Fischer, S.; Peters, M.; Meijerink, A.; Biner, Daniel; Krämer, Karl; Schultz-Wittmann, O.; Glunz, S.W.; Luther, J. (2009). Upconversion for silicon solar cells: Material and system characterization. European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC), pp. 173-180. 10.4229/23rdEUPVSEC2008-1CO.3.1

Fischer, S.; Goldschmidt, J.C.; Löper, P.; Janz, S.; Peters, M.; Glunz, S.W.; Kigel, A.; Lifshitz, E.; Krämer, Karl; Biner, Daniel; Bauer, G.H.; Brüggemann, R. (2009). Material characterization for advanced upconverter systems. European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC), pp. 620-623. 10.4229/23rdEUPVSEC2008-1CV.2.68