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

Risen Achieves 30.99% Efficiency with HJT-Perovskite Tandem Solar Cells!
February 26, 2025, at 07:30 am IST

NINGBO, China, Feb. 25, 2025 /CNW/ — Risen Energy has made significant strides in solar technology by achieving an impressive 30.99% efficiency with its HJT (Heterojunction Technology) combined with a perovskite cell in a tandem structure. This achievement not only highlights Risen’s leadership in technological innovation but also sets the stage for enhanced performance, reduced Levelized Cost of Energy (LCOE), and more sustainable solar solutions as the world transitions to greener energy sources.

What Are Tandem Solar Cells?

Tandem solar cells use different materials with distinct bandgap energies, allowing them to absorb light at various wavelengths. The upper layer, typically made of perovskite, captures high-energy short-wavelength light (like blue and ultraviolet), while the lower layer, often silicon, absorbs low-energy long-wavelength light (such as red and infrared). This structure minimizes energy loss. The theoretical efficiency limit for single-junction solar cells is approximately 33% (known as the Shockley-Queisser limit), but tandem structures can potentially exceed 44%.

Why Are HJT-Perovskite Tandem Cells Game-Changers?

• Highest Efficiency Potential and Lower Degradation: HJT cells already achieve leading efficiencies and exhibit lower power degradation over time, making them ideal for tandem integration.

• Better Electrical Connectivity: HJT cells utilize Indium Tin Oxide (ITO) as a transparent conductive layer, simplifying the connection between stacked cells and enhancing overall performance compared to technologies that rely on insulating layers.

• Sustainable Manufacturing: HJT solar cells have a lower carbon footprint, reduced material consumption, and decreased energy and water usage during production, showcasing their environmental advantages and positioning them as a more sustainable photovoltaic technology.

• 100% Production Line Compatibility: Existing HJT cell production lines are technologically compatible with perovskite cell equipment, allowing for seamless integration without modifications. This enables the co-production of perovskite and silicon-based cells on the same line, optimizing production efficiency and protecting prior investments.

Breakthroughs in Module Technology

Risen’s Hyper-Link low-temperature stress-free interconnection technology addresses limitations of traditional module encapsulation processes:
– Low-temperature processing (below 150°C) is suitable for the thermal sensitivity of perovskite materials.
– Stress-free lamination ensures the structural integrity of thin-film architectures.
– Multi-junction cell series connection efficiency can exceed 28%, boosting the performance of next-generation photovoltaic systems.

Perovskite Challenges: The Road to Commercialization

Despite their advantages, perovskite technology faces significant challenges:
– Durability Gap: Current perovskite cells degrade quickly under UV exposure and humidity, with a lifespan of less than 5 years, compared to over 30 years for silicon cells. Risen is addressing this through pioneering nano-encapsulation and self-healing materials.

• Manufacturing Complexity: Scaling up the uniformity of perovskite films requires advanced deposition techniques.

Future Outlook: What’s Next for Risen Energy?

Risen is translating laboratory successes into practical applications:
– First 730W HJT Module Delivery: In January 2025, Risen completed a 100MW shipment of HJT Hyper-ion 730W modules to Spain, marking the world’s first deployment of 730W+ projects.

• 2025 Roadmap: The company aims for an HJT module power of 740W (with a cell efficiency of 26.8%) and plans to produce 800W prototypes for tandem cells.

• 2027 Vision: Risen intends to launch 850W+ perovskite tandem modules with an annual degradation rate of less than 0.25%.

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