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Bill Joy believes he knows what’s wrong with solar innovation, and how to fix it.
The company thinks adding solar-thermal technology to its natural-gas plants will make them run more cheaply and efficiently
Their shift toward low-risk projects could strand innovative renewable-energy technology in the lab.
In acquiring Innovalight, DuPont will expand its solar business and develop new ways to make solar cells.
Quantum-dot cells designed with two layers open potential for higher efficiencies.