On May 23, SoleFiori announced the development of its perovskite-silicon tandem cell, module, and PV system. This technology has been granted an invention patent by the China National Intellectual Property Administration. It represents a breakthrough in structural design, electrical connectivity, and module compatibility. The achievement underscores another technological peak for SoleFiori in high-efficiency solar cell innovation.

High-Efficiency Tandem Cells: Breaking the Bottleneck of Single Technology

The patented technology introduces a novel tandem PV module frame utilizing a four-terminal tandem technology with reliability, safety, cost efficiency, and mass producibility. Perovskite and silicon cells each have their own advantages in spectral response, enhancing full-spectrum solar conversion. Working in tandem, they enable efficient utilization of the solar broad spectrum and significantly improve PV conversion efficiency.

In structural design, the patent precisely matches spectral absorption of the two cells with the output voltage, enabling superior optical coupling and electrical synergy. It lays the foundation for the high-efficiency output of the tandem module. Its circuit design incorporates an optimized parallel convergence and wiring scheme, minimizing energy loss. The design supports both independent and combined outputs from the dual layers, improving output stability and system efficiency.

Innovative Structure: Simplified Wiring and Cost Reduction

The structure positions encapsulation layers between cell layers and adds a transparent protective layer on the silicon side. This layer integrates positive and negative junction boxes with dual conductive pathways, allowing the perovskite and silicon layers to share the same polarity busbars. The integration reduces junction box requirements, streamlines wiring complexity, lowers cable costs, and improves module compatibility and maintenance.

Advancing the “Dual-Carbon” Goal and Industrial Upgrading

Perovskite-silicon tandem technology is widely recognized as a key path of next-gen high-efficiency PV cells, emerging as a strategic focus for global solar industry competition. SoleFiori’s patent delivers advancements in spectral response, voltage synergy, and circuit integration. It supports the development of new-gen PV modules with higher power density and stronger system adaptability. The solution has the feasibility of mass production and sustainable increase in power generation capacity per unit area of PV modules. It promotes that the industry focus more on higher efficiency, lower cost, and stronger compatibility.

As a pioneer in tandem cell innovation, SoleFiori has continued to promote independent research and development and intellectual property strategies around the core material system, structural design, and key processes. The company is establishing a mass-production cell pathway with practicality, replicability, and scalability and steadily constructing a technology channel from the lab to the factory. This patent demonstrates SoleFiori’s deep technical foundation and sustained innovation, reinforcing its strategic position in the premium PV sector. In the future, SoleFiori will take this as a starting point to fully accelerate the productization and commercialization of perovskite-silicon tandem cells, advancing next-gen PV technologies from concept to market and powering the global transition to low-carbon energy.