tandem solar cells

Researchers in Saudi Arabia have built a perovskite-silicon tandem cell with textured silicon wafers to offer superior light trapping. The device has an open-circuit voltage of 1,851 mV, a short-circuit current of 18.9 mA/cm2, and a fill factor of 80.1%.

A Chinese-Swiss research group claims to have overcome two major challenges for the development of flexible all-perovskite tandem solar cells – voltage losses and the deposition process for the cell’s functional layers. They built a device with a high open-circuit voltage of 2.1 V.

Researchers in Saudi Arabia claim to have reduced cell-to-module losses in tandem perovskite silicon photovoltaic devices through an optical redesign of the module through refractive-index engineering. They built a monolithic perovskite-silicon tandem mini-module with a power conversion efficiency of 26.2%.

Swiss scientists have built a 4T tandem perovskite/CIGS mini-panel with a geometric fill factor of over 93%. It combines a 10.8%-efficient mini perovskite module and a 15.1%-efficient CIGS device.

The new world record was independently certified by the National Renewable Energy Laboratory (NREL) in the United States.

Researchers in Germany have built a perovskite-organic solar cell with low interfacial losses and a high open-circuit voltage. The device achieved an open-circuit voltage of 2.15 V, a short-circuit current of 14.0 mA cm−², and a fill factor of 80%.

The Korean manufacturer and the German research center were able to improve the performance of their jointly developed tandem solar cell by almost one percentage point.

Scientists at the Nankai University in China have provided a comprehensive overview of current research on silicon heterojunction-based tandem solar cells (SHJ-TSCs) and shared their expectations of future developments in this field.

Energy commissioner Kadri Simson has opened the 38th European solar technology conference and exhibition with a positive message for the industry. A week of tech and innovation events have got under way at this year’s event, which is again being held online.

New research from Australia has shown that singlet fission solar cells do not only have the potential to raise the theoretical efficiency of the PV technology to unexpected levels but also to provide a better temperature behavior and longer duration compared to conventional PV devices. The scientists believe that this technique may help conventional crystalline silicon solar cell technologies reach efficiencies close to 30%.