DAS Solar & UtmoLight unveil TSiP 2.0 tandem solar module

DAS Solar, a China-based manufacturer of PV cells and modules, has launched the TSiP 2.0 tandem solar module in collaboration with UtmoLight, a China-based perovskite technology company. The module has achieved a certified conversion efficiency of 26.8% with a large-area format of 2.82m². According to DAS Solar, the TSiP 2.0 uses a four-terminal structure that combines a semi-transparent perovskite top cell with a TOPCon 5.0 silicon bottom cell. The perovskite layer captures shorter wavelengths, while longer wavelengths pass through to the silicon layer for additional energy conversion. DAS Solar has also integrated Polyfinger structures and nano-scale enhancements into the silicon layer to improve infrared absorption. The company said that additional features, including bandgap tuning, light-trapping structures, and anti-reflection coatings, have been applied to increase photon capture. DAS Solar stated that this tandem structure overcomes efficiency limitations seen in conventional single-junction silicon solar cells.