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University of Kerala, an India-based public university, has developed a 21.18% efficient lead-free solar cell at its Photovoltaics Research Laboratory. Professor Jayakrishnan R, who heads the university’s department of physics, said the cell uses tin, rubidium and cesium in a perovskite structure instead of toxic lead. The findings were published in ACS Applied Engineering Materials, a journal brought out by the American Chemical Society. The reported work emerged from MSc student Sooraj S’s dissertation, with contributions from Adithya Nath R and Arya Narayanan. The technology is liquid-processed and compatible with advanced printing techniques, which the article said can support lower-cost manufacturing for small and medium enterprises. The report added that the cells can generate more electricity from rooftops and smaller plots in land-scarce India, while supporting decentralised solar manufacturing and aligning with the Keralam’s Net-Zero 2050 ambitions.
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