Xiannan Photovoltaic Silicon-based Perovskite Cell

Can perovskite/silicon monolithic tandem solar cells 'planarize' textured silicon?

Here we report high-throughput blade coating of a wide-bandgap perovskite on sub-micrometer-scale, double-side-textured silicon to achieve efficient perovskite/silicon monolithic tandem solar cells. In this new tandem device structure, the perovskite cell “planarizes” the textured silicon surface by filling the valleys between pyramids.

What is textured silicon photovoltaics & solution-processed perovskite?

This new tandem architecture combines the advances of textured silicon photovoltaics and solution-processed perovskite photovoltaics to increase the efficiency while reducing the cost of monolithic perovskite/silicon tandem cells. Integrating perovskites onto textured silicon provides a pathway to 30% tandem solar cells.

What is the power conversion efficiency of a perovskite-silicon tandem solar cell?

A perovskite-silicon tandem cell with a 1-square-centimeter illuminated area had a power conversion efficiency of 33.7%. —Phil Szuromi To achieve the full potential of monolithic perovskite/silicon tandem solar cells, crystal defects and film inhomogeneities in the perovskite top cell must be minimized.

What is the difference between a silicon and a perovskite solar cell?

Notably, the silicon subcell exhibited a pseudo-V OC of 0.715 V whereas the perovskite subcell voltage increased from 1.249 to 1.281 V. In the context of the target tandem solar cell, the simulated pseudo-FF and pseudo-PCE values reached 85.3 and 35.7%, respectively.

What are fully textured perovskite silicon tandem solar cells?

Fully textured perovskite silicon tandem solar cells rely on the deposition of the perovskite absorber on textured silicon with a >1 μm pyramid size, which represents the current standard in the industry. To bridge the gap between research and industry, these cells must demonstrate a high power output.

Can a perovskite-silicon solar cell be fabricated?

Image: Huaqiao University, nature communications, Common License CC BY 4.0 Researchers at the Huaqiao University in China have fabricated a four-terminal (4T) perovskite-silicon solar cell with a top cell based on a perovskite material with an energy bandgap of 1.67 and lower surface defects.