Solar energy advances go largely unnoticed

Solar energy advances go largely unnoticed
In much of the United States, about 1000 watts of extractable solar energy strikes the Earth per square meter. To increase the efficiency of a pricey solar cell from 30 percent to 90 percent would be significant. In an hour, you could get .9 kilowatt …

New tool for analyzing solar-cell materials
To make a silicon solar cell, you start with a slice of highly purified silicon crystal, and then process it through several stages involving gradual heating and cooling. But figuring out the tradeoffs involved in selecting the purity level of the …
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