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A group of researchers led by the Autonomous University of Querétaro in Mexico have proposed for the first time to fabricate thin-film solar cells relying on an absorber made of silver, barium, titanium, and selenium (Ag2BaTiSe4).

The scientists explained that their approach consisted of analyzing the absorber's electron affinity, interfacial defects, and parasitic resistance, as well as assessing the impact of these factors on cell performance. They also tested different types of buffer layers in the proposed cell configuration, in an effort to find non-toxic alternatives to cadmium sulfide (CdS).