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新型材料有望大幅降低太阳能电池成本

2019-10-09 22:34:29来源:励志吧0次阅读

  新型材料有望大幅降低太阳能电池成本

  Photovoltaic Breakthroughs Brighten Outlook for Cheap Solar Power

  光伏技术突破照亮廉价太阳能前景

  By David Biello

  Enough sunlight bathes Earth's daytime half in an hour to meet all human energy needs for a year. Sadly, there are several problems with meeting human energy demands by tapping such abundant, free solar power—not least of which is the cost of making semiconducting material that can cheaply harvest the power in sunlight. But material improvements from the California Institute of Technology and IBM might just lower the cost of solar power.

  照射地球半小时的阳光就足够让全人类用上一年。可悲的是,人类面临几项难题来开采这么丰富的免费能量,其中包括制造半导体材料的成本。然而,加州理工大学和IBM的材料研究进展有可能降低太阳能的生产成本。

  Graduate student Michael Kelzenberg and other materials scientists at Caltech employed vertical crystals of silicon—microwires, like blades of grass, Kelzenberg says—to capture as much as 85 percent of the full spectrum of incoming sunlight, the researchers report in the February 14 Nature Materials. (Scientific American is part of Nature Publishing Group.) Their efficiency is almost as good as that of traditional silicon wafers, yet they require just one percent of the silicon in such wafers.

  加州理工的研究生Michael Kelzenberg和其他一些材料科学研究人员采用一种像草叶一样(Kelzenberg语)的垂直硅晶体microwire来捕获高达85%的全光谱入射阳光。这项研究已发表在2月14日的自然材料刊物上。他们的效率几乎和传统硅片一样高,但这种薄膜只需要1%的硅。

  With one one-hundredth of the material, we've gotten it to absorb 96 percent of the peak visible light, Kelzenberg says. There's lots of reasons to believe this could be scaled to make thin-film solar cells.

  “用1%的材料,我们让它吸收96%的峰值可见光”,Kelzenberg说。“有很多理由相信,这种材料可以用来生产薄膜太阳能电池。”

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