Dual nanostructures in poly (3-hexylthiophene) based organic photovoltaics under alternative current electric field |
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| Authors: | Cindy X. Zhao Kewei WangJames F. Britten Matthew ZhiXizu Wang Zhi K. ChenGu Xu |
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| Affiliation: | a Department of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S4L7b Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S4M1c Institute of Materials Research and Engineering, Singapore 117602, Singapore |
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| Abstract: | Two-dimensional X-ray diffraction was employed, to provide a complete understanding of the energy efficiency improvement of organic photovoltaics by AC electric field alignment. Two distinguishable poly (3-hexylthiophene) (P3HT) nanostructures were found in the form of two separated layers, one of which is highly oriented and the other randomly distributed. The finding helps to analyze the crystallite arrangements not only in the interface in the bulk heterojunction, but also those closer to the substrate. The highly oriented P3HT layer, although located near the substrate, was found to enhance the device efficiency, by increasing the short circuit current and decreasing the series resistance. |
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| Keywords: | X-ray diffraction Organic photovoltaic device Nanostructure |
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