Fabrication process of the one-side electrode for the lateral organic solar cells

Abstract

Lateral structured solar cells has several advantages comes from their transparent electrode free structure. In the field of organic solar cells, it is hard to achieve high efficiency with lateral structure because short carrier diffusion length in the organic active material makes it difficult to fabricate an electrode, which has short distance between cathode and anode to collect enough charge to achieve practical efficiency. In this paper, using nano imprint lithography and oblique angle thermal deposition, one-side electrode structure for organic solar cells, which has 100nm of distance between cathode and anode, is fabricated. Poly(3-hexylthiophene-2,5-diyl):Phenyl-$C_{61}$-butyric acid methyl ester (P3HT:PCBM) solar cell is also demonstrated.