Enhanced Spectral Coverage
- Broad Spectrum Utilization: Tandem solar cells can cover a broader spectrum of sunlight. By stacking different materials with varying bandgaps, they can efficiently capture a wider range of solar radiation than single layer cells. This allows them to harness energy that would be lost in traditional single-junction solar cells.
Optimized Light Management
- Improved Light Management: The structure of tandem cells can include features like nano textures or spectral splitters, which improve light trapping and management. This reduces losses due to reflection and parasitic absorption, boosting overall efficiency.
Avoidance of Limitations
- Exceeding Single-Cell Limits: Theoretically, tandem cells can exceed the efficiency limits of single-junction solar cells, known as the Shockley-Queisser limit. For perovskite-silicon tandems, this means potential efficiencies can surpass those of either material alone, reaching up to 45.7% for two-terminal configurations.
Commercialization Potential
- Perovskite-Silicon Tandem Advances: Recent advancements have led to tandem cells achieving high efficiencies. For example, perovskite-silicon tandem cells have reached efficiencies of over 32.5% in some configurations. Moreover, commercialization efforts aim to increase solar panel efficiency by up to 50% using such “miracle” cells.
Technological Improvements
- Layer Optimization: Enhancing the efficiency of individual layers within the tandem structure, such as optimizing the hole transport layer (HTL) in perovskite solar cells, is crucial. Proper layer selection can significantly improve hole extraction and overall cell performance.
By combining these advantages, tandem solar cells offer a promising path to improving the efficiency of perovskite-based solar energy systems.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/how-do-tandem-solar-cells-enhance-the-efficiency-of-perovskite-solar-cells/
