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Solar Frontier, in joint research with Japan's New Energy and Industrial Technology Development Organization, says it has achieved a record-breaking energy conversion efficiency of 19.7% for cadmium-free, copper indium selenide thin-film solar cells measuring approximately 0.5 square centimeters.

The efficiency was measured by the National Institute of Advanced Industrial Science and Technology. It has been ten years since the previous record of 18.6% was surpassed, Solar Frontier adds.

This world record was achieved using cells cut from a 30 cm x 30 cm substrate, rather than specifically developed small-area cells, demonstrating high potential for further increases. Moreover, the formation method utilized by Solar Frontier to achieve the result is the same method that the company uses for mass production - a process of sputtering followed by selenization.

Solar Frontier says it has chosen this method over co-evaporation due to greater efficiencies in mass production and aims to surpass the current record of 20.3% efficiency set with the co-evaporation method.




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