Title:
Optical Properties of Thin-film Silicon Solar Cells with Grating Couplers
Author(s):
C. Haase and H. Stiebig
Source:
PROGRESS IN PHOTOVOLTAICS: RESEARCH AND APPLICATIONS
Vol./Issue/Date:
Prog. Photovolt: Res. Appl. 2006; 14
Year:
2006
Page(s):
629–641
Keywords:
optics; grating; solar cells; modelling; light trapping; microcrystalline silicon; light
in-coupling
Abstract:
The effect of grating couplers on the optical properties of silicon thin-film solar cells
was studied by a comparison of experimental results with numerical simulations. The
thin-film solar cells studied are based on microcrystalline silicon (lc-Si:H) absorber
layers of thickness in the micrometer range. To investigate the light propagation in
these cells, especially in the red wavelength region, three-dimensional power loss profiles
are simulated. The influence of different grating parametres—such as period
size, groove height, and shape of the grating—was studied to gain more insight into
the light propagation within thin-film silicon solar cells and to determine an optimized
light trapping scheme. The effect of the TCO front and TCO back side layer
thickness was investigated. The calculated quantum efficiencies and short-circuit
current densities are in good agreement with the experimental data. The simulations
predict further optimization criteria.
Document:
Reference Id:
289
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