title: Enhanced performance of organic thin film solar cells using electrodes with nanoimprinted light-diffraction and light-diffusion structures.
abstract: An ITO substrate with periodic surface nanostructures was used to induce strong diffusion and diffraction of incident light. The nanostructures were fabricated using nanoimprint lithography on photoresist followed by coating of the ITO layer and organic materials with uniform morphology. The nanostructures embedded into the ITO layer were found to increase absorption in poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester solar devices. The short-circuit current of the nanostructured organic solar cells improved from 7.07 to 10.76 mA/cm2. This improvement was due to the increased effective optical path of absorbed light resulting from the trapping and scattering by the nanostructures.
authors.affiliation: Department of Applied Chemistry, National Chiao Tung University , 1001 University Road, Hsinchu 30010, Taiwan.
authors.forename: Jheng-Yuan
authors.initials: JY
authors.lastname: Chen
authors.forename: Ming-Hung
authors.initials: MH
authors.lastname: Yu
authors.forename: Chih-Yu
authors.initials: CY
authors.lastname: Chang
authors.forename: Yi-Hsiang
authors.initials: YH
authors.lastname: Chao
authors.forename: Kien Wen
authors.initials: KW
authors.lastname: Sun
authors.forename: Chain-Shu
authors.initials: CS
authors.lastname: Hsu