Plasmonic Forward Scattering Effect in Organic Solar Cells: A Powerful Optical Engineering Method

Title
Plasmonic Forward Scattering Effect in Organic Solar Cells: A Powerful Optical Engineering Method
Authors
백세웅노정현이춘호김봉수서민규이정용
Keywords
Organic solar cels; Plasmonic scattering; Solar energy and photovoltaic technology; Nanoparticles; Nanophotonics and plasmonics; Molecular electronics
Issue Date
2013-04
Publisher
Scientific Reports
Citation
VOL 3, 1726-1-1726-7
Abstract
In this report, plasmonic effects in organic photovoltaic cells (OPVs) are systematically analyzed using size-controlled silver nanoparticles (AgNPs, diameter: 10 ~ 100 nm), which were incorporated into the anodic buffer layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The optical properties of AgNPs tuned by size considerably influence the performance levels of devices. The power conversion efficiency (PCE) was increased from 6.4% to 7.6% in poly[N-9-hepta-decanyl-2,7-carbazole-alt-5,5-(4,7-di-2-thienyl-2,1,3-benzothiadiazole)] (PCDTBT):[6,6]-phenyl C71-butyric acid methyl ester (PC70BM) based-OPVs and from 7.9% to 8.6% in polythieno[3,4-b]thiophene/benzodithiophene (PTB7):PC70BM based-OPVs upon embedding the AgNPs. The external quantum efficiency (EQE) was significantly enhanced by the absorption enhancement due to the plasmonic scattering effect. Finally, we verified the origin of the size-dependent plasmonic forwarding scattering effect of the AgNPs by visualizing the scattering field with near-field optical microscopy (NSOM) and through analytic optical simulations.
URI
http://pubs.kist.re.kr/handle/201004/46200
ISSN
20452322
Appears in Collections:
KIST Publication > Article
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