Small-area Passivated Contact monoPoly TM Silicon Solar Cells for Tandem Device Integration

Tandem solar cells consisting of perovskite and silicon sub-cells are very promising for low-cost electricity generation due to low fabrication cost and high efficiency potential. Due to the limited active area of perovskite top cells available at the moment, the fabrication of small-area passivated contact n-type monoPolyTM silicon solar cells customized for tandem applications is investigated by scaling down from 6-inch full-size solar cells fabricated using industrial tools. The directly fabricated small-area silicon solar cells have an efficiency of 33% for the wavelength range 750 - 1100 nm of the AM1.5G solar spectrum. By optimizing both perovskite and silicon sub-cells, an energy conversion efficiency of 24.9% was achieved for perovskite on silicon four-terminal tandem cells.