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Last year, Assistant Professor Zachary Holman and Assistant Research Professor Zhengshan “Jason” Yu in ASU’s Ira A. Fulton Schools of Engineering set a world record of 23.6 percent efficiency for a tandem solar cell stacked with perovskite and silicon.
Now, the team improves upon the by nearly two percentage points, to 25.4 percent, in a joint project with researchers at the University of Nebraska-Lincoln ( #UNL), predicting they’ll be nearing 30 percent tandem efficiency within two years.
Holman cites a study that found in the business-as-usual scenario that 5 percent of electricity will be generated by solar in 2030. If the cost is reduced to the targeted $0.03 per kilowatt hour, that number goes up to 17 percent. This would result in a reduction in carbon dioxide emissions of billions of tons.
The team is now turning its attention to the other two solar cell parameters that determine efficiency – short-circuit current and fill factor – in an effort to exceed the maximum theoretical efficiency of a silicon solar cell. The team envisions its tandem solar cells will be on roofs in approximately 10 years. ——————–***——————–
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Location: Arizona State University
Date: Jan 14, 2019 @ 16:30
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