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

被引：20

作者：

Bai, Wenli ^{[1
,2
,3
]}

Gan, Qiaoqiang ^{[1
,4
]}

Song, Guofeng ^{[2
]}

Chen, Lianghui ^{[2
]}

Kafafi, Zakya ^{[1
,5
,6
]}

Bartoli, Filbert ^{[1
]}

机构：

[1] Lehigh Univ, Dept Elect & Comp Engn, Bethlehem, PA 18015 USA

[2] Chinese Acad Sci, Inst Semicond, Beijing 100083, Peoples R China

[3] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China

[4] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA

[5] Natl Sci Fdn, Div Chem, Arlington, VA 22230 USA

[6] Natl Sci Fdn, Div Mat Res, Arlington, VA 22230 USA

来源：

JOURNAL OF PHOTONICS FOR ENERGY | 2011年 / 1卷

关键词：

organic photovoltaics; surface plasmon polaritons; broadband light trapping; PHOTOVOLTAIC CELLS; FUNDAMENTAL LIMIT; EFFICIENCY; PROGRESS;

D O I：

10.1117/1.3585876

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3585876]

引用

页数：12

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