In a groundbreaking development, the German Fraunhofer Institute for Solar Energy Systems, French CPV manufacturer Soitec, and the Helmholtz Research Center in Berlin have set a new world record by achieving a photovoltaic conversion efficiency of 44.7% using four-junction solar cells under a light concentration of 297. This achievement marks a major leap forward in solar technology, with the potential to drastically cut the cost of solar power and bring us closer to cells with over 50% efficiency.
This is not the first time these organizations have made headlines in the field. Earlier this year, in May, they collaborated with researchers from the CEA-Leti laboratory in France to achieve a 43.6% efficiency at a concentration of 319. Building on that success, the team refined their techniques, optimized materials, and pushed the boundaries of what’s possible in multi-junction solar cell design.
The new solar cells are specifically designed for concentrating photovoltaic (CPV) systems, which use lenses or mirrors to focus sunlight onto high-efficiency cells. CPV is seen as a promising third-generation solar technology, offering higher efficiency than traditional silicon-based panels. By capturing more concentrated light, these systems can generate more electricity per unit area.
The four-junction design uses different III-V semiconductor materials—such as gallium, indium, nitrogen, and phosphorus—to create multiple layers. Each layer captures a specific portion of the solar spectrum, allowing the cell to convert more of the sunlight into electricity. This layered approach is key to achieving such high efficiencies.
Frank Demers, head of R&D at the Fraunhofer Institute, emphasized the long-term effort behind the breakthrough. “After years of research, we’ve combined advanced material science with innovative structural design,†he said. “A key factor was the ‘wafer bonding’ technique, which allows us to precisely stack semiconductor layers, creating the most efficient combination possible.â€
Andrei Jacqueliman, CEO of Soitec, added: “Seeing a 1% increase in efficiency in just four months shows the huge potential of four-junction cells. I’m confident that we’ll soon see solar cells surpassing 50% efficiency, which could revolutionize how we generate clean energy.â€
Poleline Casting
Ductile cast iron pole line hardware refers to various components and fittings used in the construction and installation of utility poles and overhead power lines. These components are typically made of ASTM A536 Ductile Iron, a durable and strong material that is able to withstand the weight and tension of power lines.
Some common examples of Ductile cast iron pole line hardware include Thimble Clevis, Insulator mounting brackets, Pole top insulator Bracket, Vertical Insulator Bracket, Cuout and Arrester Bracket, messenger extension, Aerial Suspension Clamp, Crossarm Grid Gain, Guy Hook and Pole Eye Plate. These components are essential for supporting and securing power lines, insulators, and other equipment on utility poles.
Cast iron pole line hardware is known for its long-lasting durability and resistance to corrosion, making it a popular choice for utility companies and power line installers. It is important to use high-quality and properly installed hardware to ensure the safety and reliability of overhead power lines.
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