Patented nanostructure for solar cells: Rough optics, smooth surface

phys.org | 9/18/2018 | Staff
max1max1 (Posted by) Level 4
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"It is not enough simply to bring more light into the cell," says Becker. Such surface structures can even ultimately reduce the efficiency by impairing the electronic properties of the material.

The idea that David Eisenhauer worked out as part of his doctorate in Becker's team sounds quite simple, but it requires a completely new approach: to produce a structure that behaves "optically rough" and scatters the light, but at the same time provides a "smooth" surface on which the silicon layer (the most important layer of the solar cell) can grow with virtually no defects.

Procedure - Steps - Researchers - Nanostructure - Silicon

The procedure consists of several steps: first, the researchers imprint an optimised nanostructure onto a still liquid silicon oxide precursor layer that is then cured with UV light and heat. This creates tiny, regularly arranged cylindrical elevations that are ideal for capturing light. However, the absorbing layer of crystalline silicon cannot grow flawlessly on this rough surface, so these structures...
(Excerpt) Read more at: phys.org
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