New quantum solar cell material promises external quantum efficiency of 190%

The new material consists of an heterostructure combining germanium, selenium, and tin sulfide, which also integrates atoms of zerovalent copper. It features an average photovoltaic absorption over 80% and could help photovoltaic cells break the Shockley-Queisser efficiency limit, according to its creators. Researchers at Lehigh University in the United States developed a new thin-film solar cell absorber material that reportedly features an average photovoltaic absorption of 80% and an external quantum efficiency (EQE) of 190%. Th EQE is the ratio of the number of electrons collected by the solar ...

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