According to a recent report by the Physiologist Network, Canadian scientists have developed a new technology that can significantly improve the performance of solar cells. This technology can increase the solar energy conversion efficiency by 35% in the near infrared region and the overall conversion efficiency This is an 11% increase, making quantum dot photovoltaics an excellent candidate to replace existing solar cell technologies. Related papers published in the latest issue of "nano Express."
Quantum dot photovoltaic cells provide low-cost, large-area solar power, but the device is inefficient at the infrared side of the solar spectrum, which accounts for half of the solar energy reaching the Earth. Teide Sargentt, a professor of engineering at the University of Toronto in Canada, and his team propose that plasma nanoparticles can provide unprecedented control over the propagation and absorption of light through spectral tuning and solution-processing of plasma nanoparticles.
Colloidal quantum dots have two major advantages. The first is cheaper because they reduce the cost per watt of electricity, but the more important advantage is that simply changing the size of the quantum dots can change the absorption spectrum. The easy-to-change and tunable properties of plasma materials By changing the size of the plasma particles, researchers can overlap the absorption and scattering spectra of these two important nanoparticles.
Sargent's team has increased the efficiency of solar cells by embedding gold nanoshells directly into QDs, and they will be looking for ways to achieve the same goal with cheaper metals. Paul Weiss, director of the Institute of Nanoscale Systems at the University of California, believes the research is important because of its potential to improve solar cell efficiency by tuning nanoparticle properties.
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