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Nanoimprinting-induced nanomorphological transition in polymer solar cells: Enhanced electrical and optical performance

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Title
Nanoimprinting-induced nanomorphological transition in polymer solar cells: Enhanced electrical and optical performance
Author(s)
Jeong S.; Cho C.; Kang H.; Kim K.-H.; Youngji Yuk; Jeong Young Park; Kim B.J.; Lee J.-Y.
Publication Date
2015-03
Journal
ACS NANO, v.9, no.3, pp.2773 - 2782
Publisher
AMER CHEMICAL SOC
Abstract
We have investigated the effects of a directly nanopatterned active layer on the electrical and optical properties of inverted polymer solar cells (i-PSCs). The capillary force in confined molds plays a critical role in polymer crystallization and phase separation of the film. The nanoimprinting process induced improved crystallization and multidimensional chain alignment of polymers for more effective charge transfer and a fine phase-separation between polymers and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) to favor exciton dissociation and increase the generation rate of charge transfer excitons. Consequently, the power conversion efficiency with a periodic nanostructure was enhanced from 7.40% to 8.50% and 7.17% to 9.15% in PTB7 and PTB7-Th based i-PSCs, respectively. © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/2102
ISSN
1936-0851
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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