Broadband short-range surface plasmon structures for absorption enhancement in organic photovoltaics

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

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Abstract

We theoretically demonstrate a polarization-independent nanopatterned ultra-thin metallic structure supporting short-range surface plasmon polariton (SRSPP) modes to improve the performance of organic solar cells. The physical mechanism and the mode distribution of the SRSPP excited in the cell device were analyzed, and reveal that the SRSPP-assisted broadband absorption enhancement peak could be tuned by tailoring the parameters of the nanopatterned metallic structure. Three-dimensional finite-difference time domain calculations show that this plasmonic structure can enhance the optical absorption of polymer-based photovoltaics by 39% to 112%, depending on the nature of the active layer (corresponding to an enhancement in short-circuit current density by 47% to 130%). These results are promising for the design of organic photovoltaics with enhanced performance. © 2010 Optical Society of America.
Original languageEnglish (US)
Pages (from-to)A620-A630
JournalOptics Express
Volume18
Issue number104
DOIs
StatePublished - Nov 8 2010
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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