Displayed over roof tops and in solar farms, silicon-based solar cells are, so far, one of the most efficient systems in generating electricity from sunlight, but their fabrication can be expensive and energy demanding, aside from being heavy and bulky. The alternative solution of lower-cost thin film solar cells also brings the caveat of being mainly composed of toxic elements such as lead or cadmium, or containing scarce elements such as indium or tellurium.
In the search for new technologies for thin photovoltaic systems, solar cells based on AgBiS2 nanocrystals have emerged as a star player in the game, consisting of nontoxic, earth-abundant elements, p...
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