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The silicon shortage that has kept solar electricity expensive is ending.
Advanced biofuels, more-efficient vehicles, and solar power top the most notable energy stories of 2007.
First Solar’s thin-film technology is now challenging silicon panels at large-scale solar-power facilities.
On the surface of a new photovoltaic prototype, microscopic nanotube towers perform best when they catch light on their sides.
The new design could lead to cheaper solar cells.
A Caltech group has created materials that could improve the efficiency of solar cells.
Silicon shortages drove up prices, but supplies are now increasing.
By borrowing a trick from optical-fiber technology, a startup makes cells that trap light to create more electricity.