Strain regulation boosts efficiency of textured perovskite/silicon solar cells

• Revolutionary strain regulation strategy boosts efficiency of fully textured perovskite/silicon tandem solar cells to 31.5%, promising low-cost manufacturing and optimal light trapping.

Researchers have developed a strain regulation strategy for high-performance, fully textured perovskite/silicon tandem solar cells, which shows promise for low-cost manufacturing and ideal light trapping. The conformal growth of high-quality perovskite film on fully textured silicon has been a challenge due to the lack of effective regulation of structural evolution and residual strains.

The researchers from multiple institutions reported a strain regulation strategy by forming a 3D/3D perovskite heterojunction at the buried interface through a vacuum-deposition method applicable to pyramidal texture. This strained heterojunction enables high-performance, fully textured perovskite/silicon tandem solar cells with an efficiency of up to 31.5%, promoting preferred crystal growth, reducing interfacial defect-induced recombination, and facilitating charge extraction. The fully textured perovskite/silicon tandem cell achieved a certified steady-state efficiency of 31.5% and retained over 95% of its initial efficiency after 800 hours of continuous operation.

How have researchers improved efficiency of fully textured perovskite/silicon tandem solar cells?

• Researchers have developed a strain regulation strategy by forming a 3D/3D perovskite heterojunction at the buried interface through a vacuum-deposition method applicable to pyramidal texture.
• The strained heterojunction enables high-performance, fully textured perovskite/silicon tandem solar cells with an efficiency of up to 31.5%.
• The strategy promotes preferred crystal growth, reduces interfacial defect-induced recombination, and facilitates charge extraction.
• The fully textured perovskite/silicon tandem cell achieved a certified steady-state efficiency of 31.5%.
• The cell retained over 95% of its initial efficiency after 800 hours of continuous operation.