According to MoneyDJ, Solar Frontier, a subsidiary of Showa Shell Sekiyu KK specializing in CIS thin-film solar cell production, announced on the 2nd that it has successfully partnered with Japan's New Energy and Industrial Technology Development Organization (NEDO). This collaboration led to a significant breakthrough, as Solar Frontier integrated its own CIS thin-film technology, achieving a record battery conversion rate of 20.9%.
This new efficiency level marks a major milestone for cadmium-free thin-film solar cells, surpassing the previous record of 19.7% set by Solar Frontier in 2013 and becoming the highest globally. Even when compared to cadmium-containing thin-film solar cells, this achievement is groundbreaking, as it exceeds the former world record of 20.8%, making it the most efficient thin-film solar cell available today.
Earlier, on December 19, 2013, Showa Shell announced plans to invest approximately 13 billion yen in constructing a new CIS thin-film solar cell plant called "Tohoku Plant" (tentative name) in Miyagi Prefecture, Japan. The facility was expected to become operational by March 2015, with an annual production capacity of 150 MW. Combined with the company’s existing three CIS thin-film plants in Miyazaki Prefecture, which have a total annual capacity of 980 MW, the overall production capacity will rise to 1,130 MW in the future.
CIS thin-film solar cells are made using copper (Cu), indium (In), and selenium (Se) as primary materials. One of their key advantages is that their cost remains stable regardless of fluctuations in silicon prices. Additionally, these panels can still generate electricity even under cloudy conditions or partial shading, making them highly versatile for various environments.
Despite this progress, the current conversion rate of CIS thin-film solar cells still lags behind that of mainstream crystalline silicon solar cells. However, according to Solar Frontier's president, Yujing Yuren, the newly constructed Tohoku Plant will introduce advanced production techniques that aim to bring the conversion efficiency of CIS thin-film cells closer to, if not equal to, that of crystalline silicon technology. This development could position CIS thin-film solar cells as a strong competitor in the evolving renewable energy market.
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