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Influence of the Back Reflector Texture on Light Scattering and Performance of a nip-Type Microcrystalline Silicon Thin-Film Solar Cell
M. Ermes, W. Böttler, K. Bittkau, V. Smirnov
Light Scattering, Optical Simulation, Thin Film Solar Cell
Thin Film Solar Cells
Subtopic: Amorphous and Microcrystalline Silicon Solar Cells
Event: 27th European Photovoltaic Solar Energy Conference and Exhibition
Session: 3DV.2.18
2628 - 2631
ISBN: 3-936338-28-0
Paper DOI: 10.4229/27thEUPVSEC2012-3DV.2.18
0,00 EUR
Document(s): paper


We investigate the influence of the back texture of a microcrystalline thin-film silicon solar cell on light scattering and performance by both experiment and simulation. Investigations were performed on both normally fabricated solar cells and solar cells with a polished front side to eliminate scattering at the front interface. The interfaces at both sides of the silicon nip-structure were measured by atomic force microscopy and incorporated in optical simulation. By taking into account the real three-dimensional structure of the device, we can investigate local effects within every layer of the solar cell. Our investigations show that the back texture is dominant for light scattering in the long wavelength range, where light path enhancement is necessary to obtain good absorption rates in the silicon.