Formation of Nanopatterned Polymer Blends in Photovoltaic Devices

He, Ximin and Gao, Feng and Tu, Guoli and Hasko, David and Hüttner, Sven and Steiner, Ullrich and Greenham, Neil C. and Friend, Richard H. and Huck, Wilhelm T. S.. (2010) Formation of Nanopatterned Polymer Blends in Photovoltaic Devices. Nano Letters, 10 (4). pp. 1302-1307. ISSN 1530-6984

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In this paper, we demonstrate a double nanoimprinting process that allows the formation of nanostructured polymer heterojunctions of composition and morphology that can be selected independently. We fabricated photovoltaic (PV) devices with extremely high densities (1014/mm2) of interpenetrating nanoscale columnar features in the active polymer blend layer. The smallest feature sizes are as small as 25 nm on a 50 nm pitch, which results in a spacing of heterojunctions at or below the exciton diffusion length. Photovoltaic devices based on double-imprinted poly((9,9-dioctylfluorene)-2,7-diyl-alt-[4,7-bis(3-hexylthien-5-yl)-2,1,3-benzothiadiazole]-2′,2′′-diyl) (F8TBT)/ poly(3-hexylthiophene) (P3HT) films are among the best polymer−polymer blend devices reported to date with a power conversion efficiency (PCE, ηe) of 1.9%.

Item Type: Article
Additional Information: Abstract reprinted by permission from American Chemical Society. Copyright 2010.
Uncontrolled Keywords: polymer photovoltaics, polymer blends, heterojunction solar-cells, efficiency
InterNano Taxonomy: Areas of Application > Energy and Utilities
Nanoscale Objects and Nanostructured Materials > Nanocomposites > Polymeric
Nanomanufacturing Processes > Nanopatterning/Lithography
Collections: Nanomanufacturing Research Collection
Related URLs:
Depositing User: Mr. Richard L Rosen
Date Deposited: 13 Jul 2010 16:16
Last Modified: 13 Jul 2010 16:16

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