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Research Papers

Efficiency Enhancement of Solar Cells by Application of a Polymer Coating Containing a Luminescent Dye

[+] Author and Article Information
L. H. Slooff

 Energy Research Centre of the Netherlands (ECN), P.O.Box 1, 1755 ZG Petten, The Netherlandsslooff@ecn.nl

R. Kinderman, A. R. Burgers, N. J. Bakker, J. A. M. van Roosmalen

 Energy Research Centre of the Netherlands (ECN), P.O.Box 1, 1755 ZG Petten, The Netherlands

A. Büchtemann, R. Danz, M. Schleusener

 Fraunhofer-Institute for Applied Polymer Research, Geiselbergstr. 69, D-14476 Golm, Germany

J. Sol. Energy Eng 129(3), 272-276 (Apr 27, 2006) (5 pages) doi:10.1115/1.2735347 History: Received November 10, 2005; Revised April 27, 2006

One of the major loss mechanisms in state of the art photovoltaic cells is spectral loss resulting from inefficient use of ultraviolet photons and the lack of absorption of infrared photons by the solar cell. For a Si solar cell, e.g., spectral losses alone result in over 55% loss of the energy of the solar spectrum. Converting the spectrum of the incoming light such that it has a better match with the absorption spectrum of the solar cell can reduce spectral losses, especially in the case of a small absorption band, such as for dye sensitized solar cells and polymer solar cells. In this paper it is shown that the ultraviolet response of a multicrystalline silicon solar cell and polymer solar cell can be enhanced by application of a polymer coating doped with a luminescent dye. An increase in the power conversion efficiency is obtained for coatings with luminescent dyes with an absorption onset <450 nm. Coatings with luminescent dyes that absorb at higher wavelengths give rise to lower power conversion efficiencies. When applied to a dye sensitized solar cell, a decrease in the cell performance is observed.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

External quantum efficiency spectrum of a bare mc-Si solar cell with anti-reflection coating (solid line), a polymer P3HT:PCBM cell (dashed line), and a dye sensitized cell (dotted line)

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Figure 2

(a) Absorption spectra of dyes in PMMA films on glass slides with an absorption edge below 450nm; and (b) absorption spectra of dyes in PMMA films on glass slides with an absorption edge above 450nm

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Figure 3

(a) External quantum efficiency spectrum of LSCs with an absorption edge below 450nm on top of a mc-Si solar cell; and (b) external quantum efficiency spectrum of LSCs with an absorption edge above 450nm on top of a mc-Si solar cell

Grahic Jump Location
Figure 4

(a) External quantum efficiency spectrum of LSCs with an absorption edge below 450nm on top of a P3HT:PCBM cell; and (b) external quantum efficiency spectrum of LSCs with an absorption edge above 450nm on top of a P3HT:PCBM cell

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Figure 5

External quantum efficiency spectrum of LSCs on top of a DSSC

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