Nano-solar cells are expected to break the energy conversion bottleneck
According to a study published recently in the journal Nature Photonics, nanowires absorb about 14 times as much sunlight as normal sunlight. Scientists predict that the future of nanowires, not only in the field of solar cells, but also in quantum computers and other electronic products also have great potential for development.
Researchers at the Nelspor Institute's nano-science center at the University of Copenhagen in Denmark and the Swiss Institute of Technology in Lausanne, Denmark, say that the unique physical absorbance of nanowires breaks the limits of using solar energy. Peter Krogstrup, PhD, of Nilspoort Research Institute, said the findings show great potential for the future development of nanowire solar cells.
In recent years, researchers have been studying how to improve and improve the quality of nanowire crystals. Nanocrystalline crystal columnar structure, the diameter of one ten thousandth of human hair. The results show that nanowires can collect 15 times more solar rays in a very small area. Since the diameter of the nanowires is smaller than the wavelength of sunlight, light intensity resonance can be caused inside and around the nanowires.
Dr. Krös Luppe explained that resonance concentrates the sun's rays and converts it into energy, which greatly increases the efficiency of solar energy conversion. In addition, some Swedish scientists also said that the large amount of electricity generated by solar cells also allows sunlight to be absorbed into the nanowires.
According to Crusaders, the Shockley-Quayel limit (SQ limit), which has long been considered the bottleneck of solar cell conversion efficiency, appears likely to break. Although the current research results have only increased by a few percentage points, it will have a significant impact on the development of solar cells, the development of nano-solar radiation and global energy development. However, it will take time for the industrialization of nano-wire solar cells.
The so-called Shockley? Kui Yi efficiency limit measurement of about 33.5%, is a single pn junction solar cells. This means that if the solar cell can collect 1000 watts of solar per square meter, then it can produce a maximum of about 335 watts per square meter.
The research partners include the Semiconductor Materials Laboratory, the Lausanne Institute of Technology, the Danish solar cell company SunFlake A / S and the foundation, whose research and findings were published in the January issue of Science.
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