#China #Risen Energy #Ningbo #HJT Technology #Perovskite Cells

Risen Energy's Breakthrough in Solar Efficiency

Risen Energy Co., Ltd has recently reported a noteworthy achievement in its solar panel technology by attaining a staggering efficiency of 30.99% through its innovative HJT (Heterojunction Technology) combined with perovskite tandem structures. This achievement marks a significant milestone for the company, demonstrating its commitment to advancing solar energy solutions while contributing positively to the global energy transition.

Understanding Tandem Solar Cells

Tandem solar cells work by stacking different materials that have unique bandgap energies to optimize light absorption across various wavelengths. The upper layer typically utilizes perovskite materials that capture high-energy short-wavelength light, such as blue and ultraviolet rays. The lower layer, often made of silicon, efficiently harnesses lower-energy long-wavelength light, including red and infrared. Together, this combination minimizes energy loss and maximizes conversion efficiency.

The theoretical efficiency limit for single-junction solar cells sits around 33%, according to the Shockley-Queisser limit. However, tandem structures, which incorporate multiple junctions, could push this boundary beyond 44%. This has led to the rising interest in tandem configurations, especially HJT-perovskite combinations, due to their promising performance potential.

Why Are HJT-Perovskite Tandem Cells Game-Changers?

1. Exceptional Efficiency and Longevity

HJT cells are renowned for their high efficiency and reduced degradation over time, even under environmental stress, making them perfect candidates for tandem integration with perovskite materials.

2. Superior Electrical Connectivity

Unlike traditional methods, HJT technology employs Indium Tin Oxide (ITO) as a transparent conductive layer, ensuring better electrical connectivity. This design simplifies the stack connection of the tandem cells, enhancing performance.

3. Eco-Friendly Production

The manufacturing process for HJT cells involves a lower carbon footprint and reduced resource consumption, presenting a more environmentally sustainable approach for photovoltaic technology.

4. Seamless Production Line Integration

Risen's existing production lines are primed for HJT technology, facilitating smooth integration of perovskite cell manufacturing without substantial alterations, thus preserving investments and improving operational efficiency.

5. Innovative Module Technology

Risen is tackling traditional module encapsulation issues with its Hyper-Link low-temperature stress-free interconnection technology, which aligns with the thermal sensitivity of perovskite materials. This allows for improved performance in multi-junction cell configurations.

Challenges Ahead for Perovskite Technology

Despite its promise, perovskite technology does carry challenges that hinder its commercial success, such as:

• - Durability Issues: Current perovskite cells are prone to rapid degradation under UV exposure and humidity, with lifespans considerably shorter than that of silicon-based cells. To counteract this, Risen is researching advanced encapsulation methods and self-healing materials to extend the lifespan of these cells.
• - Manufacturing Complexity: Achieving uniformity in perovskite films at scale is challenging and demands sophisticated deposition techniques to ensure quality control.

Future Outlook for Risen Energy

Looking ahead, Risen Energy aims to translate its laboratory successes into meaningful contributions to solar energy. In January 2025, it celebrated the completion of its first shipment of the world’s first 730W HJT modules to Spain. This solidifies its position in the leading edge of energy technology.

2025 Ambitions

• - Power ratings for HJT modules are expected to increase to 740W, with cell efficiency reaching 26.8%.
• - Plans are underway to develop 800W prototypes for tandem production.

2027 Vision

Risen aims to introduce 850W+ perovskite tandem modules, targeting less than 0.25% annual degradation. This ambitious roadmap highlights Risen's commitment to pushing the boundaries of solar technology towards a cleaner, more efficient future.

Through its continued innovation and leadership in the solar industry, Risen Energy sets the stage for a greener energy landscape.