25 Oct '11, 4am

Black Silicon From Sionyx Raises PV Efficiency: A process known as black silicon can improve the infrared sens...

Black Silicon From Sionyx Raises PV Efficiency: A process known as black silicon can improve the infrared sens...

A process known as black silicon can improve the infrared sensitivity of silicon and silicon-based photonics. MIT spun-out a company called Sionyx to apply their laser-based black silicon process to imaging and solar. The firm just announced results that demonstrate a 0.3% (absolute) efficiency improvement over standard solar cells. Sionyx was founded in 2006 and has taken more than $20 million in funding from Polaris Ventures, Harris & Harris, Vulcan Capital, Coherent, CrossLink Capital, and RedShift Ventures. The startup uses lasers to texture the silicon surface with nano-cavities which lowers surface reflectance and improves light trapping. More light gets trapped, less gets reflected, and more power gets produced. There are a variety of ways, chemical and physical, to create black silicon. And most solar firms perform a texturing step on their wafers or cells. I spoke...

Full article: http://www.greentechmedia.com/articles/read/Black-Silicon...

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