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

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

Author Affiliations +

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

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