Jerry Mimandi, an assistant professor of electrical and computer engineering at the University of Maryland, and graduate students Yunlu Xu and Tao Gong designed a new type of nano-solar cell that they expect to outperform 40% more efficiently than conventional equipment. This new technology can generate more power from a small single device and can revolutionize the solar industry.
Xu, Gong, and Mundy published their study on the efficiency limits of Shockley Quayser for nanostructured solar cells in the journal Science Report, an online, publicly available journal of Nature Press. This journal publishes basic research results that are scientifically based in all areas of natural and clinical science.
The Shockley Quayse efficiency limit is the limit of solar energy conversion efficiency that can be achieved with a particular material and is a standard against new photovoltaic technologies. What is the efficiency limit for a standard solar cell? 33%. However, people recently wondered if nano solar cells are also constrained by this limit.
Now, Xu, Gong, and Mundy have confirmed a single-junction nanostructure solar cell. Under typical solar illumination, what is the maximum theoretical efficiency? 42%. This goes beyond the efficiency of traditional planar devices, but does not exceed the Shockley Quayse efficiency limit of planar devices in concentrated light conditions, such as solar cells that use sunlight from the lens. Researchers have found that nanostructured solar cells provide an important path for manufacturing efficient photovoltaic devices through "built-in concentrating". Even when researchers consider the effects of light scattering in the atmosphere, nanostructured solar cells pass? A modest built-in spotlight of 1,000 can also achieve an efficiency of 35.5%.
When Mundy and his team designed and built nano-solar cells, they found that the biggest challenge came from nanofabrication technology. “In the beginning you designed a well-functioning solar cell, and then you started some big structural modifications on the nanoscale, all without any loss,†Mundy said. “Fortunately, we have now found some promising materials and processes, and there are students from a team who are passionate about this field, and are expected to make a big impact in the field of solar technology.â€
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