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Article: Slim and sturdy solar cells: nanocrystals offer path to electricity.(This Week)
- Article from:
- Science News
- Article date:
- October 22, 2005
- Author:
CopyrightCOPYRIGHT 2005 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Engineers have for years been developing solar cells made of inexpensive plastic, but the devices have limitations. For instance, the cells' short lifetimes when exposed to sunlight have prevented these inventions from getting beyond the prototype phase. Now, researchers describe a solar cell made of thin films of inorganic nanocrystals that have several of the advantages of plastic but avoid some of its shortcomings.
Researchers first turned to semiconducting plastics to devise solar cells because such materials are cheaper to produce than silicon, the main ingredient of conventional solar cells, and are more flexible. Plastic formulations also open the ...