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




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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

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





Author: Shu-Ju Tsai 1,2,†, Mihaela Ballarotto 2,3, Hung-Chih Kan 1,2,4 and Raymond J. Phaneuf 1,2,3,*

Source: http://mdpi.com/



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