Müller-Meskamp, L.L.Müller-MeskampKim, Y.H.Y.H.KimRoch, T.T.RochHofmann, S.S.HofmannScholz, R.R.ScholzEckardt, S.S.EckardtLeo, K.K.LeoLasagni, A.F.A.F.Lasagni2022-03-042022-03-042012https://publica.fraunhofer.de/handle/publica/22815010.1002/adma.2011043312-s2.0-848569522052-s2.0-84863048701Direct laser interference patterning (DLIP) is used to fabricate large area, two-dimensional periodic surface patterns on polyethylene terephthalate (PET) substrates to enhance the performance of ZnPc:C60 solar cells by light concentration in the absorber layer. Comparing the power conversion efficiencies to the reference cell on flat PET, a relative increase of 21% is observed for the hexagonal pattern with 0.7 ?m period, depicted in the figure.en621620journal article