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Which Way Out? Solar Cells That Trap Light

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Michael A. Greenwood

Although the supply of sunlight is endless, the ability to effectively harness this vast power source remains limited. Most of the photons that hit low-cost thin-film solar cells simply bounce off, and their energy is never captured. In recent years, researchers have experimented with approaches to improving solar cell efficiency, essentially by capturing the photon and forcing it to cooperate. This is done by changing the basic architecture of solar cells so that photons become trapped — or at least temporarily delayed — when they come into contact with the cell, thus providing a greater...Read full article

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    Published: February 2008
    energyFeatureslight absorptionnanoelectrodesthin-film solar cells

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