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The low-cost cells make their debut on electronics-charging bags.
Inkjet-printed silicon increases solar-cell efficiency.
Nanosolar’s new factory could help lower the price of solar power, if the market cooperates.
Carbon nanotube photovoltaics can wring twice the charge from light.
New manufacturing techniques could cut solar power costs by 20 percent.
The solar industry says incremental advances have made transformational technologies unnecessary.
A simpler design could reduce the cost of solar power generated by concentrating sunlight on Stirling engines.