Effects of Nanostructure Geometry on Nanoimprinted Polymer Photovoltaics

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Effects of Nanostructure Geometry on Nanoimprinted Polymer Photovoltaics

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Title: Effects of Nanostructure Geometry on Nanoimprinted Polymer Photovoltaics
Author(s):
Yang, Yi;
Mielczarek, Kamil;
Aryal, Mukti;
Zakhidov, Anvar A. (UT Dallas);
Hu, Wenchuang (Walter) (UT Dallas)
Item Type: Article
Keywords: Show Keywords
Description: Walter Hu is also known as Wenchuang Hu,Includes supplementary material
Abstract: We demonstrate the effects of nanostructure geometry on the nanoimprint induced poly(3-hexylthiophene-2,5-diyl) (P3HT) chain alignment and the performance of nanoimprinted photovoltaic devices. Out-of-plane and in-plane grazing incident X-ray diffraction techniques are employed to characterize the nanoimprint induced chain alignment in P3HT nanogratings with different widths, spacings and heights. We observe the dependence of the crystallite orientation on nanostructure geometry such that a larger width of P3HT nanogratings leads to more edge-on chain alignment while the increase in height gives more vertical alignment. Consequently, P3HT/6,6]-phenyl-C61-butyric-acid-methyl-ester (PCBM) solar cells with the highest density and aspect ratio P3HT nanostructures show the highest power conversion efficiency among others, which is attributed to the efficient charge separation, transport and light absorption.
Publisher: RSC Pub
ISSN: 2040-3372
Persistent Link: http://hdl.handle.net/10735.1/4106
http://dx.doi.org/ 10.1039/c4nr01114g
Terms of Use: ©2014 The Royal Society of Chemistry. This article may not be further made available or distributed.
Sponsors: "This work is supported by NSF (grant no. ECCS-0901759), Welch Foundation Grant AT-1617, and DOE Phase II STTR program on “Tandem Organic Solar Cells” (grant no. DE-SC00003664)."

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