Perovskite-Silicon Tandem Solar Cell PerovSun Enters Mass Production: PV Efficiency Breaks 35%
GCL Technology and Oxford PV's jointly developed perovskite-silicon tandem solar cell PerovSun has entered mass production with 35.2% lab efficiency and 32.8% production efficiency — over 50% higher than mainstream PERC cells.
China's GCL Technology and UK-based Oxford PV announced in June 2028 that their jointly developed perovskite-silicon tandem solar cell PerovSun has officially entered mass production. PerovSun achieved 35.2% certified lab efficiency and 32.8% production efficiency — over 50% higher than mainstream PERC cells' 22%.
PerovSun uses a dual-layer structure: a conventional silicon cell as the bottom layer and perovskite material on top. The perovskite layer absorbs short-wavelength light while the silicon layer absorbs long-wavelength light, achieving efficiency beyond single-junction cell theoretical limits.
Oxford PV CEO Chris Case said: "PerovSun's mass production is a watershed moment for the PV industry. The same rooftop area can now generate 50% more electricity."
GCL has commenced PerovSun production at its Jiangsu facility with 2GW annual capacity. Initial shipments target the distributed PV market, with per-watt pricing about 20% above PERC but lower levelized electricity costs due to higher generation.
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