A major breakthrough has been made in the development of colloidal quantum dot (CQD) films, leading to the most efficient CQD solar cell ever.
The new solar cell was created out of very inexpensive materials, and has been certified at a world-record 7.0% efficiency. That’s a 37% increase in efficiency over the previous record holder.
“Previously, quantum dot solar cells have been limited by the large internal surface areas of the nanoparticles in the film, which made extracting electricity difficult,” said Dr. Susanna Thon, a lead co-author of the paper. “Our breakthrough was to use a combination of organic and inorganic chemistry to completely cover all of the exposed surfaces.”
Quantum dots are semiconductors that are a few nanometres in size and can be used to generate electricity from the entire solar spectrum, visible and invisible wavelengths. And CQD films can be created very quickly and cheaply, in a way similar to paint or ink.
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