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Materials researchers at Estonia’s Tallinn University of Technology partially substituted copper with silver in solar cells’ absorber material to improve the efficiency of the devices. In a study published in the Journal of Materials Chemistry A, the scientists explain that their goal is to develop the next generation of thin-film solar cells based on compound semiconductors. A thin-film solar cell consists of several thin layers of semiconductor materials. For efficient thin-film solar cells, a semiconductor with very good light-absorbing…