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 NEDO (New Energy and Industrial Technology Development Organization) to enhance its CIS thin-film solar technology. The latest battery conversion rate has reached an impressive 20.9%, marking a significant milestone in the industry.
This achievement surpasses the previous record of 19.7% set by Solar Frontier in 2013, making it the highest conversion rate for cadmium-free thin-film solar cells globally. In the category of cadmium-containing thin-film solar cells, the 20.9% rate also exceeds the previous world record of 20.8%, solidifying Solar Frontier's position as a leader in this field.
In December 2013, Showa Shell announced plans to invest approximately 13 billion yen in constructing a new CIS thin-film solar cell plant called "Tohoku Plant" (provisional name) in Miyagi Prefecture, Japan. The facility is expected to become operational in March 2015, with an annual production capacity of 150MW. When combined with Showa Shell’s existing three plants in Miyazaki Prefecture, which have a total annual capacity of 980MW, the company’s overall production capacity will rise to 1,130MW.
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, they can generate electricity even under cloudy conditions or when partially shaded, making them suitable for a wide range of environments.
Despite these benefits, the current efficiency of CIS thin-film solar cells still lags behind that of mainstream crystalline silicon panels. However, according to Solar Frontier's President Yujing Yuren, the new Tohoku Plant will introduce advanced production techniques aimed at significantly improving efficiency. The goal is to bring the performance of CIS thin-film technology closer to, if not on par with, that of conventional crystalline silicon solar cells.
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