Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 9, Pages 6164-6169Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am405865w
Keywords
nanostructure; nanoimprint lithography; light trapping; organic photovoltaic; diffraction; haze
Funding
- Ministry of Science and Technology of the Republic of China [NSC 102-2112-M-009-011-MY3]
- Approaching Top University (ATU) Program of the Ministry of Education of the Republic of China
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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/cm(2). This improvement was due to the increased effective optical path of absorbed light resulting from the trapping and scattering by the nanostructures.
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