Optical optimization of a-Si:H solar cells using planar junctions and diffuse rear reflectors

Simple unoptimized planar junction amorphous silicon-based solar cells with TiO/sub 2/ based diffuse rear reflectors can obtain i-layer absorption similar to that of solar cells prepared on high quality commercially available textured TCO substrates. Also, the naturally occurring surface roughness i...

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Bibliographic Details
Main Authors: Winz, K., Fortmann, C.M., Eickhoff, T., Wagner, H.
Format: Conference Proceeding
Language:English
Subjects:
Absorption
Amorphous materials
AMORPHOUS STATE
DESIGN
FABRICATION
LIGHT TRANSMISSION
Optical films
Optical materials
Optical scattering
Photovoltaic cells
Probes
REFLECTIVITY
Rough surfaces
SILICON
SILICON SOLAR CELLS
SOLAR ENERGY
Substrates
SURFACE PROPERTIES
Surface roughness
TITANIUM OXIDES
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Summary:Simple unoptimized planar junction amorphous silicon-based solar cells with TiO/sub 2/ based diffuse rear reflectors can obtain i-layer absorption similar to that of solar cells prepared on high quality commercially available textured TCO substrates. Also, the naturally occurring surface roughness in amorphous and microcrystalline materials can be exploited to fabricate very effective diffuse rear reflectors. Accurate determination of surface roughness and film optical properties are required to fully probe the potential of diffuse reflection from naturally occurring surface roughness. However, the coupling of bulk optical parameters with surface roughness artifacts poses difficulties for accurate determination of film optical properties. A new technique was developed and implemented to characterize surface scattering.
ISSN:0160-8371
DOI:10.1109/PVSC.1997.654191