Recently, the Fujian Provincial Institute of Metrology (hereinafter referred to as "Fujian Institute of Metrology") successfully completed the acceptance review for its scientific research project titled "Development and Testing of Semi-Transparent Solar Cells Based on Tin-Based Perovskite Photosensitive Layers," funded by the Fujian Provincial Market Supervision Administration. The project achieved groundbreaking innovations in perovskite material design and processing technology and has filed a national patent application for "A Semi-Transparent Perovskite Solar Cell Based on Ternary Cation Perovskite Absorber Layer and Its Preparation Method."
With the rapid development of the new energy industry, traditional photovoltaic systems' reliance on rooftops or open spaces has limited their application scenarios. Semi-transparent solar cells, which can be integrated into vehicles or building facades, have emerged as a key direction for efficient space utilization and enhanced power generation. As a core representative of third-generation photovoltaic technology, perovskite solar cells have previously achieved semi-transparency by thinning the absorber layer or creating discontinuous films. However, this approach struggles to balance light transmittance and absorption, leading to significant performance degradation. Additionally, insufficient stability and lead toxicity remain critical bottlenecks for industrialization. Improper lead encapsulation poses serious environmental and health risks.
Addressing these industry challenges and aligning with national new energy strategic needs, the Fujian Institute of Metrology's research team developed a lead-free semi-transparent perovskite cell using an innovative tin-ion substitution approach. Through advancements such as novel additives, precise perovskite composition control, and ultra-thin electrode deposition, the team significantly improved the cell's light transmittance and operational stability. To ensure accurate performance evaluation, the team systematically tested key metrics, including photoelectric conversion efficiency, visible light transmittance, chromaticity coordinates, and color rendering index, establishing standardized testing methods and evaluation criteria.
The project's outcomes provide crucial theoretical and technical support for photovoltaic enterprises, laying the foundation for commercializing semi-transparent perovskite cells suitable for building-integrated photovoltaic systems. Currently, several Fujian-based companies are actively investing in perovskite photovoltaic glass and curtain wall R&D. The project's findings will accelerate industrialization efforts and bolster the development and market expansion of next-generation photovoltaic products in Fujian Province.
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