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Thin but efficient solar cells use one-tenth the silicon of conventional cells.
Research shows that silicon can wring two electrons from each photon of incoming light.
A biomimetic ceramic that is strong and tough could be used to make lightweight vehicles.
New reactor technologies offer poorer nations cheap, safe, efficient power. Sanctions designed to prevent the proliferation of weapons impede their use. What would a better policy look like?
A Google-backed startup says gallium nitride could make power electronics more efficient.
An engine from Lotus and Continental Powertrain consumes 15 percent less fuel.
Nanocrystals could light the way to using LEDs to replace the lightbulb.
Taking advantage of human error tolerance could make cell phones more energy efficient.
Superconducting cables could make power-grid infrastructure more secure.