A Chinese team improved kesterite solar cell efficiency using potassium fluoride (KF) treatment to optimize absorber quality and interface properties. The best device reached 8.04% efficiency, with gains driven by reduced interface defects and improved carrier management.
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https://www.pv-magazine.com/2026/06/09/chinese-scientists-improve-kesterita-solar-cell-efficiency-with-potassium-fluoride/
