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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/11594

Title: Addition of regiorandom poly(3-hexylthiophene) to solution processed poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester graded bilayers to tune the vertical concentration gradient
Authors: Vohra, Varun
Higashimine, Koichi
Murakami, Tatsuya
Murata, Hideyuki
Keywords: Graded Bilayers
Vertical Concentration Gradient
bulkhetero junction
Issue Date: 2012-10-22
Publisher: American Institute of Physics
Magazine name: Applied Physics Letters
Volume: 101
Number: 17
Start page: 173301-1
End page: 173301-4
DOI: 10.1063/1.4761998
Abstract: Donor-acceptor vertical concentration gradient in the active layer is of crucial importance in graded bilayer poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) solar cells. We demonstrate that upon addition of regiorandom P3HT to graded regioregular P3HT:PCBM bilayers, we are able to tune the vertical concentration gradient. With the help of energy-dispersive x-ray spectroscopy elemental mapping of the device cross-sections, we find a strong relationship between the concentration gradient profile and the device performances. Upon addition of regiorandom P3HT, the devices exhibit power conversion efficiencies up to 3.83% (compare to 3.09% for regioregular P3HT devices).
Rights: Copyright 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Varun Vohra, Koichi Higashimine, Tatsuya Murakami and Hideyuki Murata, Applied Physics Letters, 101(17), 173301 (2012) and may be found at http://dx.doi.org/10.1063/1.4761998
URI: http://hdl.handle.net/10119/11594
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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