CdS/Cu(In,Ga)S2 based solar cells with efficiencies reaching 12.9% prepared by a rapid thermal process. - Merdes, S.; Abou‐Ras, D.; Mainz, R.; Klenk, R.; Lux‐Steiner, M. Ch.; Meeder, A.; Schock, H. W.; Klaer, J. (Progress in Photovoltaics, 2013)