Researchers from Lehigh University have developed a material that demonstrates the potential for drastically increasing the efficiency of solar panels.
A prototype using the material as the active layer in a solar cell exhibits an average photovoltaic absorption of 80%, a high generation rate of photoexcited carriers, and an external quantum efficiency (EQE) up to an unprecedented 190%—a measure that far exceeds the theoretical Shockley-Queisser efficiency limit for silicon-based materials and pushes the field of quantum materials for photovoltaics to new heights.
"This work represents a significant leap forward in our understanding and development of sustainable energy solutions, highlighting innovative approaches that could redefine solar energy efficiency and accessibility in the near future," said Chinedu Ekuma, professor of physics, who published a paper on the development of the material with Lehigh doctoral student Srihari Kastuar in the journal Science Advances.
The material's efficiency leap is attributable largely to its distinctive "intermediate band states," specific energy levels that are positioned within the material's electronic structure in a way that makes them ideal for solar energy conversion.
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