Formation of Nanopatterned Polymer Blends in Photovoltaic Devices
2010 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 10, no 4, 1302-1307 p.Article in journal (Refereed) Published
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 (10(14)/mm(2)) 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 hererojunctions 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, eta(e)) of 1.9%.
Place, publisher, year, edition, pages
American Chemical Society , 2010. Vol. 10, no 4, 1302-1307 p.
Polymer photovoltaics; nanoscale morphology; nanoimprint lithography; polymer blends
IdentifiersURN: urn:nbn:se:liu:diva-115697DOI: 10.1021/nl904098mISI: 000276557100037PubMedID: 20199061OAI: oai:DiVA.org:liu-115697DiVA: diva2:796100
Funding Agencies|Engineering and Physical Science Research Council; Gates Cambridge Trust2015-03-182015-03-182015-03-31