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By 2010, China had firmly established itself as one of the world's leading suppliers of corrugated metal roofing. The country's robust industrial base, combined with an abundance of raw materials, enabled manufacturers to produce high-quality metal roofing at competitive prices. A significant number of suppliers emerged during this period, offering a variety of products that catered to domestic and international markets.
However, advancements in materials and technologies have opened up avenues for exceeding the Shockley-Queisser limit through multi-junction solar cells. These cells stack multiple layers of different semiconductor materials, each with a unique bandgap. By capturing a broader spectrum of sunlight, multi-junction cells can achieve efficiencies of over 45% under concentrated sunlight conditions. This innovation holds great promise for applications in space technology and high-efficiency solar farms.
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