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Energies 2015, 8(3), 1547-1560; doi:10.3390/en8031547

Effect of Extended Extinction from Gold Nanopillar Arrays on the Absorbance Spectrum of a Bulk Heterojunction Organic Solar Cell

1
Department of Materials Science and Engineering, University of Maryland, College Park, MD 20740, USA
2
Laboratory for Physical Sciences, College Park, MD 20740, USA
3
Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742, USA
4
Department of Physics, National Chung-Cheng University, Tainan 701, Taiwan
Current address: Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: I. M. Dharmadasa
Received: 7 November 2014 / Accepted: 14 January 2015 / Published: 18 February 2015
(This article belongs to the Special Issue Next Generation of Photovoltaic (PV) Technology)
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Abstract

We report on the effects of enhanced absorption/scattering from arrays of Au nanopillars of varied size and spacing on the spectral response of a P3HT:PCBM bulk heterojunction solar cell. Nanopillar array-patterned devices do show increased optical extinction within a narrow range of wavelengths compared to control samples without such arrays. The measured external quantum efficiency and calculated absorbance, however, both show a decrease near the corresponding wavelengths. Numerical simulations indicate that for relatively narrow nanopillars, the increased optical extinction is dominated by absorption within the nanopillars, rather than scattering, and is likely dissipated by Joule heating. View Full-Text
Keywords: organic solar cells; plasmonics; nanostructures organic solar cells; plasmonics; nanostructures
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tsai, S.-J.; Ballarotto, M.; Kan, H.-C.; Phaneuf, R.J. Effect of Extended Extinction from Gold Nanopillar Arrays on the Absorbance Spectrum of a Bulk Heterojunction Organic Solar Cell. Energies 2015, 8, 1547-1560.

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