Antimony Selenide Tandem Solar Cell Exceeds 20% Efficiency

• Breakthrough tandem solar cell exceeds 20% efficiency with antimony selenide and hybrid perovskite materials. A game-changer in solar energy technology.

A research team has successfully fabricated a tandem solar cell with a power conversion efficiency exceeding 20%. This was achieved by using antimony selenide as the bottom cell material and a wide-bandgap organic–inorganic hybrid perovskite material as the top cell material. The study, published in Energy Materials and Devices, highlights the potential of antimony selenide for bottom cell applications in tandem solar cells.

Tandem solar cells are more efficient at converting sunlight into electricity compared to single-junction solar cells. By stacking different solar cell materials on top of each other, researchers can achieve higher energy efficiency. The team optimized the antimony selenide bottom cell and introduced a transparent conducting electrode for an optimized spectral response, resulting in a power conversion efficiency of over 20%. They plan to further improve device performance and explore the potential of antimony selenide in two-terminal tandem solar cells.

How did researchers achieve over 20% efficiency in tandem solar cells?

• The research team utilized antimony selenide as the bottom cell material in the tandem solar cell.
• A wide-bandgap organic–inorganic hybrid perovskite material was used as the top cell material.
• By stacking these two materials, the researchers were able to achieve a power conversion efficiency exceeding 20%.
• The team optimized the antimony selenide bottom cell and introduced a transparent conducting electrode for improved spectral response.
• Tandem solar cells are more efficient than single-junction solar cells due to the stacking of different materials.
• The researchers plan to continue improving device performance and explore the potential of antimony selenide in two-terminal tandem solar cells.