Solar cell based on silver bismuth sulfide exceeds 10% efficiency threshold for first time

This kind of solar cell technology had so far reached efficiencies of up to 9%. The new result was made possible by a post-deposition in situ passivation strategy to reduce surface defects in the device, according to its creators. Silver bismuth sulfide (AgBiS2) nanocrystals (NCs) are an earth-abundant material that has been used in recent years as a promising PV material, often in combination with cadmium sulfide in the development of several kinds of ultra-thin solar cells. Solar cells built with these nanocrystals have so far reached efficiencies of up to 9% and their optoelectronic overall ...

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