A Major Breakthrough in Clean Energy Technology
In a landmark development for the global renewable energy sector, Chinese solar technology giant LONGi Green Energy Technology has officially broken the world record for solar cell efficiency. The company’s crystalline silicon-perovskite tandem solar cells have achieved an unprecedented 35.5% power conversion efficiency.
This historic milestone was formally unveiled at the 2026 Solar and Energy Storage Innovation Conference in Shanghai and has been independently verified and certified by the European Solar Test Installation (ESTI). The new figure surpasses the previous world record of 35.2%, which was also established by LONGi earlier this year.
Unlocking the Perovskite Advantage: Breaking Physical Limitations
For decades, commercial solar photovoltaic (PV) systems have predominantly relied on single-junction crystalline silicon cells. However, conventional silicon cells face a hard physical limit—the theoretical Shockley–Queisser limit—which caps their maximum possible efficiency at roughly 33.7% (with practical commercial panels typically operating between 22% and 25%).
To transcend this threshold, engineers have turned to tandem solar cell architecture by layering an ultra-thin perovskite semiconductor on top of a standard silicon base:
Top Perovskite Layer: Absorbs short-wavelength, high-energy photons (such as blue light and ultraviolet rays).
Bottom Silicon Layer: Captures longer wavelengths (such as red and near-infrared light).
By harvesting distinct portions of the solar spectrum simultaneously, tandem cells significantly reduce thermal loss and raise the theoretical efficiency ceiling to an astonishing 43%—paving the way for vastly superior energy yields.
Transitioning from Laboratory Benchmarks to Industrial Scale
Setting laboratory records is only the first step; commercial viability requires scaling up cell dimensions and module performance. LONGi has demonstrated consistent progress across larger form factors:
Large-area tandem cells: Achieved verified conversion efficiencies of 34.3% and 32.2%.
Full tandem photovoltaic modules: Reached notable efficiencies of 31.4% and 29.4%.
Earlier this year, the company’s 35.2% two-terminal tandem cell record was documented in the globally recognised Solar Cell Efficiency Tables, spearheaded by Professor Martin Green at the University of New South Wales (UNSW), Australia.
What This Means for the Future of Renewable Power
This latest breakthrough arrives at a critical juncture for the PV industry. As manufacturers seek the next generation of cost-effective technologies, boosting module efficiency delivers tangible commercial and environmental benefits:
Reduced Land Footprint: Generating equivalent or greater megawatt-hour outputs from considerably smaller surface areas (ideal for rooftop installations and land-constrained regions).
Lower Balance of System (BoS) Costs: Decreasing requirements for racking, cabling, land procurement, and on-site labour per watt generated.
Accelerated Decarbonisation: Lowering the levelised cost of electricity (LCOE) to accelerate the global transition away from fossil fuels.
Whilst LONGi has yet to publish a definitive commercialisation roadmap and mass-production schedule for these record-breaking cells, this achievement reinforces the accelerating momentum towards commercially viable, ultra-high-efficiency perovskite-silicon photovoltaics.