Risen Achieves 30.99% Efficiency with HJT-Perovskite Tandem Solar Cells!

What Are Tandem Solar Cells?In tandem solar cells, different materials possess distinct bandgap energies, enabling them to absorb light of varying wavelengths. The upper-layer materials (such as perovskite) absorb high-energy short-wavelength light (e.g., blue and ultraviolet light), while the lower-layer materials (such as silicon) capture low-energy long-wavelength light (e.g., red and infrared light), thereby reducing energy waste. What Are Tandem Solar Cells?In tandem solar cells,...

NINGBO, China, 26/02/2025 (informazione.news - comunicati stampa - energia)

In tandem solar cells, different materials possess distinct bandgap energies, enabling them to absorb light of varying wavelengths. The upper-layer materials ( ) absorb high-energy short-wavelength light (e.g., blue and ultraviolet light), while the lower-layer materials (such as silicon) capture low-energy long-wavelength light (e.g., red and infrared light), thereby reducing energy waste.

The theoretical efficiency ceiling for single-junction cells is about 33% (Shockley-Queisser limit), whereas tandem structures with multiple junctions can elevate this limit  .

Despite their advantages, perovskite technology still faces critical hurdles:

Risen is already translating lab success into real-world impact:

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