uncleflo
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3 Ways to Make Solar Cells - wikiHow
Saved by uncleflo on July 15th, 2014.
Solar cells convert the sun's energy into electricity, similar to the way plants convert the sun's energy into food through photosynthesis. Solar cells work by using the sun's energy to enable electrons in semiconducting materials to move from orbits close to the nuclei of their atoms to higher orbits where they can conduct electricity. Commercial solar cells use silicon as the semiconductor, but here is a way to make a solar cell with more accessible materials to see for yourself how it works.
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Surface Recombination | PVEducation
Saved by uncleflo on October 28th, 2013.
Surface recombination can have a major impact both on the short-circuit current and on the open-circuit voltage. High recombination rates at the top surface have a particularly detrimental impact on the short-circuit current since top surface also corresponds to the highest generation region of carriers in the solar cell. Lowering the high top surface recombination is typically accomplished by reducing the number of dangling silicon bonds at the top surface by using "passivating" layer on the top surface. The majority of the electronics industry relies on the use of a thermally grown silicon dioxide layer to passivate the surface due to the low defect states at the interface1. For commercial solar cells, dielectric layers such as silicon nitride are commonly used.
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