This is not a blog dedicated to solar PV and if we have been covering more of this area, it is simply because there is so much technological advances happening here.
The concept of light-trapping has been played with for decades as a way of keeping a photon within the confines of a solar cell for longer periods of time, but there has always been upper limits of what energy the technique can wring from incoming light. By reducing the thickness of the cell to far less than the actual wavelength of light, though, appears to have a dramatic effect.
According to a paper published in Proceedings of the National Academy of Sciences, the ultrathin-film cells could improve on the macro-scale limits by as much as 12-fold.
By sandwiching the solar film between layers that act to keep light trapped for longer periods of time, chances that a photon will be absorbed are increased and increased significantly to boost efficiency. True, the technology is way off from commercial deployment, but it joins a growing array of new materials and methods that might soon dramatically increase solar power's potential.
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