Double plasmonic structure design for broadband absorption enhancement in molecular organic solar cells

Wenli Bai; Qiaoqiang Gan; Guofeng Song; Lianghui Chen; Zakya H. Kafafi; Filbert Joseph Bartoli

doi:10.1117/1.3585876

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1 January 2011 Double plasmonic structure design for broadband absorption enhancement in molecular organic solar cells

Wenli Bai, Qiaoqiang Gan, Guofeng Song, Lianghui Chen, Zakya H. Kafafi, Filbert Joseph Bartoli

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J. of Photonics for Energy, 1(1), 011121 (2011). https://doi.org/10.1117/1.3585876

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.

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Wenli Bai, Qiaoqiang Gan, Guofeng Song, Lianghui Chen, Zakya H. Kafafi, and Filbert Joseph Bartoli "Double plasmonic structure design for broadband absorption enhancement in molecular organic solar cells," Journal of Photonics for Energy 1(1), 011121 (1 January 2011). https://doi.org/10.1117/1.3585876

Published: 1 January 2011

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