Calisolar Raises $8M More

Sunnyvale, CA-based Calisolar, which has developed a low-cost way of purifying silicon for use in solar cells, continues to raise cash. This week it collected an additional $8 million in an offering of debt, options, and securities, according to a regulatory filing. Calisolar raised $3 million in a similar offering in December and $15 million a few months before that. Good Energies, Ventures West, and Yaletown Venture Partners, and other investors took part in a $20 million equity round in February 2010.

Wade Roush is a freelance science and technology journalist and the producer and host of the podcast Soonish. Follow @soonishpodcast

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