Silicon's solar edge

Silicon-based modules are on top when it comes to solar technology thanks to the rapid growth of Chinese manufacturers, but can thin-film module makers mount a comeback?

The bankruptcy this week of United States-based Abound Solar rams home the victory of silicon-based modules in the latest round of a bitter technology race that has hurt investors, including the US Department of Energy, and is far from over.

The two main photovoltaic (PV) technologies are based on crystalline silicon and thinner ("thin-film") cadmium-based semiconductors.

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