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Efficiency enhancement of organic solar cells by fabricating periodic surface textures using direct laser interference patterning

: Müller-Meskamp, L.; Kim, Y.H.; Roch, T.; Hofmann, S.; Scholz, R.; Eckardt, S.; Leo, K.; Lasagni, A.F.


Advanced Materials 24 (2012), No.7, pp.906-910
ISSN: 0935-9648
ISSN: 1521-4095
Journal Article
Fraunhofer IWS ()

Direct 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.