Tandem Silicon-perovskite Solar Cells
Tandem silicon-perovskite solar cells, based on ytterbium halide, enable the production of solar cells without the use of toxic lead, and offer flexible, lightweight, and semi-transparent cell designs. Compared to state-of-the-art crystalline silicon solar cells, which only achieve solar conversion efficiencies below 20%, these new types of solar cells can achieve solar conversion efficiencies of up to 25%. Manufacturing solutions, such as producing perovskite layers with roll-to-roll printing, mean that these types of solar cells can be produced with cheap, high throughput, continuous production processes. This approach offers distinct advantages over the conventional production processes used to manufacture silicon solar cells. Tandem cells are becoming commercially available, and are finding use in as part of “smart glass”, portable electronic devices, and in the automotive industry.
Concentrated Multi-junction III-V Solar Cells
Concentrated multi-junction III-V solar cells have set a world record for solar conversion efficiency. They achieve a conversion efficiency of 47.1% under 143 times the sun intensity through concentrated illumination, powered by a gallium indium phosphide/gallium arsenide six-junction cell. Using light concentrators, solar cells can be much smaller than the traditional solar cells while generating the same amount of electricity, reducing the panel’s relative cost by a factor of 100-1000 compared to flat-plane silicon cells. Multi-junction III-V solar cells with concentrators are bulkier than the thin-film counterparts, but have an unmatched performance for the applications in the energy sector.