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Journal of Photonics for Energy

Double plasmonic structure design for broadband absorption enhancement in molecular organic solar cells
Author(s): Wenli Bai; Qiaoqiang Gan; Guofeng Song; Lianghui Chen; Zakya H. Kafafi; Filbert Joseph Bartoli
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Paper Abstract

Absorption enhancement by a double plasmonic nanostructure in molecular organic photovoltaics (OPVs) is theoretically investigated. The structure consists of a periodic array of metal nanodiscs on one side of the OPV active layers and a thin metal nanohole array on the other side. Excitation of coupled modes of localized surface plasmon polaritons at the nanodiscs and short-range surface plasmon polaritons at the nanohole array causes the electromagnetic field to be highly concentrated within the organic active layers, leading to a polarization-independent, broadband absorption enhancement in the visible and near-infrared portion of the solar spectrum. Calculations show that an optimized double plasmonic structure can enhance the total photon absorption by >125% for molecular OPVs based on a double heterojunction of an electron donor/hole transporter and an electron acceptor/transporter.

Paper Details

Date Published: 1 January 2011
PDF: 13 pages
J. Photon. Energy 1(1) 011121 doi: 10.1117/1.3585876
Published in: Journal of Photonics for Energy Volume 1, Issue 1
Show Author Affiliations
Wenli Bai, Lehigh Univ. (United States)
Qiaoqiang Gan, Lehigh Univ. (United States)
Guofeng Song, Institute of Semiconductors (China)
Lianghui Chen, Institute of Semiconductors (China)
Zakya H. Kafafi, National Science Foundation (United States)
Filbert Joseph Bartoli, Lehigh Univ. (United States)

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