Stable High-Efficiency Perovskite/Silicon Tandem Solar Cells

Jul 25, 2024 03:50 PM ET

• Revolutionary tandem solar cells with over 29% efficiency and exceptional stability developed by top researchers in Australia. Say goodbye to traditional manufacturing concerns.

Researchers have developed stable n–i–p monolithic perovskite/silicon tandem solar cells with over 29% efficiency, using double-sided poly-Si/SiO2 passivating contact silicon cells. The majority of monolithic perovskite/Si tandem solar cells have been built on heterojunction Si solar cells, which have limited industrial uptake due to manufacturing cost and concerns over metal electrodes and transparent conductive oxides. However, researchers from The Australian National University, University of Melbourne, and University of New South Wales have demonstrated high efficiencies can be achieved with Si bottom cells based on a double-side poly-Si/Si dioxide passivating contact, without silver or TCOs.

A novel low-absorption, dopant-free bilayer-structured hole transport layer was developed for the perovskite top cell, increasing open-circuit voltage and fill factor. The tandem cells achieved a power conversion efficiency of over 29%, the highest reported for perovskite/Si TSCs based on poly-Si bottom cells and/or n–i–p perovskite top cells. The cells also showed exceptional thermal and light stability, retaining their original output after 1750 hours of light–dark cycles and maintaining 93% and 89% of their initial PCE after 500 hours and 1782 hours under continuous one-sun illumination.

What advancements have been made in stable n–i–p monolithic perovskite/silicon tandem solar cells?

• Researchers have developed stable n–i–p monolithic perovskite/silicon tandem solar cells with over 29% efficiency
  
• The cells use double-sided poly-Si/SiO2 passivating contact silicon cells for the bottom cell
  
• A novel low-absorption, dopant-free bilayer-structured hole transport layer was developed for the perovskite top cell
  
• The tandem cells achieved a power conversion efficiency of over 29%, the highest reported for perovskite/Si TSCs based on poly-Si bottom cells and/or n–i–p perovskite top cells
  
• The cells showed exceptional thermal and light stability, retaining their original output after 1750 hours of light–dark cycles
• The cells maintained 93% and 89% of their initial PCE after 500 hours and 1782 hours under continuous one-sun illumination