Wednesday, July 7, 2010

Dutch Scientists Developing Sixty Five % Efficient Nanowire Solar Cells

By Esther Alarcon

High efficiency solar cells tend to be for this moment limited to space applications, on account of their prohibitive prices. The Eindhoven University of Technology from The Netherlands, with a EUR 1.2 million help from the Dutch administration desires to develop ultra-effective solar cells that are in addition cheap. They visualize their cells having a sixty five percent efficiency, something even the satellites might be jealous of.

Presently, thin film solar cells have an effectiveness somewhere about forty percent. Recent studies as well as prototypes made with concentrated solar panels disclosed a conversion of 41 percent, though the researchers coming from TU/ want more. They will use mirror systems which concentrate the particular light one thousand times and make use of hardly any substance for the actual solar cells, which would be very expensive usually if used at complete level.

Jos Haverkort, one of the researchers, stated: "Any time the Netherlands desires to timely take part in a commercial exploitation of nanowire solar cells, there is a good desperation to get on board today." The research is conducted together with Philips MiPlaza.

Their concept concerning how to make their dream possible banks on putting a lot of subcells(junctions) within each cell, by which each subcell has to transform a specific spectrum of light optimally into electricity. The very best nanowire solar cell made to this very day comes with an 8.4 percent performance. The Dutch researchers want to encase the nanowires inside protective shells to be able to have the same high efficiency just like thin-film cells. Haverkort believes that five to ten junctions are going to be enough to improve the solar cell having the desired sixty five percent efficiency.

Production expenses are additionally cut by their proposed technology, because the nanowires which make their solar cells can be grown on cheap silicon substrate as well as grow more quickly. Gallium together with Indium, the 2 expensive and rare materials that they will utilize for the tiny solar cells are going to be used very scarcely.

Not too long ago, the price tag on solar cells was at approximately $3/watt. Now it is almost $2/watt (even less). Right after the particular researchers coming from Eindhoven will have finished their particular work plus the market will have happily approved their solar cells, the price should drop lower than 50 cents per watt, which sounds extraordinary. We will wait and we will see.

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