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Proceedings Paper

Plasmon enhancement of organic photovoltaic efficiency in tandem cells of pentacene/C60
Author(s): Shanlin Pan; Lewis J. Rothberg
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Paper Abstract

The effects of thin silver films embedded in a tandem pentacene/C60 photovoltaic cell are investigated. A 2 nm Ag film improves the device's power efficiency under white light illumination from 0.32% to 1.11% by almost doubling its open circuit voltage and enhancing its short circuit current density. The doubled open circuit voltage is due to the formation of two separated photovoltaic pentacene/C60 cells in series where discontinuous silver clusters provide carrier recombination centers. The increased photocurrent density is partly ascribed to improved charge separation and transport associated with the silver layer. In addition, wavelength dependent measurements suggest that plasmon-enhanced light absorption by pentacene due to surface plasmon resonance of silver nanoparticles contributes as much as a factor of 4 to the power efficiency near the plasmon resonance around 450 nm.

Paper Details

Date Published: 22 September 2007
PDF: 7 pages
Proc. SPIE 6641, Plasmonics: Metallic Nanostructures and Their Optical Properties V, 664109 (22 September 2007); doi: 10.1117/12.736011
Show Author Affiliations
Shanlin Pan, Univ. of Rochester (United States)
Lewis J. Rothberg, Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 6641:
Plasmonics: Metallic Nanostructures and Their Optical Properties V
Mark I. Stockman, Editor(s)

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