Researchers from the Institute for Solar Technology Helmholtz Zentrum Berlin (HZB) have developed a tandem solar element that converts 32.5% of solar radiation into electrical energy is a world record.
Tandem solar cells increase the efficiency of a solar cell by splitting the spectrum and optimizing each part of the spectrum.
The HZB tandem solar cell has been certified by the European Solar Test Installation (ESTI) in Italy and included in the US National Renewable Energy Laboratory’s Best Research-Cell Efficiency Chart.
Silicon is now the standard material in solar cells, and perovskite and silicon were developed separately as semiconductor materials for solar panels. Scientists see untapped potential in perovskite and are experimenting with it, combining it with other materials.
In late 2021, HZB researchers achieved a record solar cell efficiency of 29.8%, and in the summer of 2022, the École polytechnique fédérale de Lausanne (EPFL), Switzerland, reported a certified solar tandem cell with a value of 31.3%.