$SNPW The semiconductors in Stion’s thin-film solar panels are made of Copper, Indium, Gallium, Selenium and Sulfur (a compound commonly abbreviated as CIGS). Traditionally, CIGS-based materials have demonstrated the highest efficiencies of any thin-film technology. However, there are many variations of the technology and performance varies widely based on how the materials are deposited and processed. CIGS semiconductor film is comprised of both metallic and non-metallic elements. Stion employs two separate process steps to form the semiconductor film.
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