| Work Detail |
The German research institute explained that it used a hybrid manufacturing route to deposit the solar perovskite on the cells upper photovoltaic device, based on an industrial textured silicon heterojunction technology. For the lower subcell, a standard silicon solar cell was used.
The Fraunhofer Institute for Solar Energy Systems (Fraunhofer ISE) in Germany announced today that it has achieved a power conversion efficiency of 31.6% for a perovskite-silicon tandem solar cell.
The result was confirmed by the CalLab calibration laboratory at Fraunhofer ISE.
The researchers explained that the cell consists of an upper perovskite photovoltaic device based on heterojunction technology that was textured with micrometer-sized pyramids and a standard silicon lower cell.
“The new 1 cm² solar cell is special because the perovskite layer of the top cell was deposited on an industrially textured silicon heterojunction solar cell using a hybrid manufacturing route,” the research institute said in a statement. “The successful use of textured standard silicon solar cells and the uniform application of the perovskite layer on the textured surface are important prerequisites for the industrial production of perovskite silicon tandem solar cells.”
Fraunhofer ISE Perovskite Materials and Interfaces Group Leader Juliane Borchert explained that the proposed process combines vapor deposition and wet chemical deposition to ensure uniform deposition of the perovskite layer onto the textured silicon surface.
The scientists did not provide further technical details about the solar cell.
"The tandem solar cell manufactured at Fraunhofer ISE incorporates results from the PrEsto and MaNiTU research projects, as well as support from an intensive exchange with scientists at King Abdullah University of Science and Technology (KAUST)," they said.
In May, KAUST announced a 33.7% efficiency for a 1 cm² perovskite-silicon solar cell. The result was certified by the European Solar Test Facility (ESTI). |
