China Telecom ventures into photovoltaics! Lead-free perovskite solar cells show significant efficiency improvements.
China Telecom has entered the photovoltaic sector with a new patent for
lead-free perovskite solar cells, aiming to balance environmental safety with high performance. The core innovation involves replacing toxic lead with
FASnX3 (tin-based) and using
acetaldehyde oxime (AO)to inhibit tin oxidation, reduce defects, and promote grain growth. Key outcomes include:
Efficiency Boost: Cells with AO achieved 7.65% efficiency, nearly 50% higher than the 5.13% control group, with improved voltage (0.49V) and fill factor (67.41%).
Quality & Stability: The modification resulted in smoother films (roughness ≤14.8nm) and larger grains (500–800nm), significantly enhancing stability against degradation.
Scalable Process: The manufacturing method uses simple spin-coating and annealing, making it suitable for industrial mass production.
This move helps bridge the gap between laboratory research and commercial application, supporting China’s clean energy goals by offering a safer, high-efficiency alternative to traditional lead-based perovskites.