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Article overview
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Demonstration of a novel dispersive spectral splitting optical element for cost- effective photovoltaic conversion | Carlo Maragliano
; Tim Milakovich
; Matteo Bronzoni
; Stefano Rampino
; Eugene A. Fitzgerald
; Matteo Chiesa
; Marco Stefancich
; | Date: |
2 Aug 2015 | Abstract: | In this letter we report the preliminary validation of a low-cost paradigm
for photovoltaic power generation that utilizes a prismatic Fresnel-like lens
to simultaneously concentrate and separate sunlight into continuous laterally
spaced spectral bands, which are then fed into spectrally matched
single-junction photovoltaic cells. A prismatic lens was designed using
geometric optics and the dispersive properties of the employed material, and
its performance was simulated with a ray- tracing software. After device
optimization, it was fabricated by injection molding, suitable for large-scale
mass production. We report an average optical transmittance of ~ 90% over the
VNIR range with spectral separation in excellent agreement with our
simulations. Finally, two prototype systems were tested: one with GaAsP and
c-Si photovoltaic devices and one with a pair of copper indium gallium selenide
based solar cells. The systems demonstrated an increase in peak electrical
power output of 51% and 64% respectively under white light illumination. Given
the ease of manufacturability of the proposed device, the reported spectral
splitting approach provides a cost- effective alternative to multi-junction
solar cells for efficient light-to-electricity conversion ready for mass
production. | Source: | arXiv, 1508.0210 | Services: | Forum | Review | PDF | Favorites |
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