Thursday, 24th of July 2008
Thursday, 24th of July 2008
"solar cell" — 3 posts

If you can't make thin cells efficient fast enough, why not make efficient silicon solar cells thinner? Using the latest advances in silicon slicing and wafer coating, Kyocera plans to do just that. The company will manufacture solar cells that are 180 micrometers thick, down from the industry's standard 200 to 260 micrometers.

However, don't expect solar cell efficiency to go down, as the company intends to improve in this area as well. In October of 2006, the company's 18.5 percent efficiency set a new world record. The plan is to increase production significantly without increasing consumption. With long-term contracts already set with Kyocera's suppliers, the company is poised to accomplish its goal to mass produce the thinner solar cells by March of 2010.

Kyocera, based in Japan, is a solar manufacturer known for innovative research and development efforts. It was the first company to mass produce multicrystalline silicon solar cells using today's industry standard casting method.

Amid all the attention on increasing solar cell diversity, there's now focus on increasing solar cell durability. One method is through a special coating, one that turns UV photons into visible light with longer wavelengths. This coating has two-fold benefits, increasing both efficiency and longevity. Researchers at the University of California, Los Angeles say the coating could add years to cells' lifespans. This boost is important to solar cells, which decrease in efficiency with prolonged exposure to UV light.

A range of materials could be used in the coating, referred to as photon conversion material (PCM). These include polyflourene, liquids, solids, gels, and nanoparticles.

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A new solar cell, the screen-printed dye solar cell, is currently in development by the Fraunhofer Institute. It is made when a thin, electricity-generating film is applied between two glass panels using screen printing techniques. With this method, manufacturers will have the capacity to generate an infinite array of colors and images onto a solar module. Solar modules with a decorative twist can then be mounted over windows, providing a protective shade while generating clean energy.

Physicists admit that dye solar cells only have 4 percent efficiency and can’t rival the conventional silicon cell in this aspect. However, their decorative potential opens up a new possibility for solar cells as functional, decorative facades. Fraunhofer Institute will present the technology at the Nanotech 2008 in Tokyo.