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

Müller-Meskamp, Lars; Kim, Yong Hyun; Roch, Teja; Hofmann, Simone; Scholz, Reinhard; Eckardt, Sebastian; Leo, Karl; Lasagni, Andrés Fabián · Adv Mater · 2012

basic_science · Level V

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Abstract

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 μm period, depicted in the figure.

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