Muneeza Khan
Member
The research team introduced a prototype utilizing a quantum material as the active layer within a solar cell. This material exhibited a photovoltaic absorption rate of 80% and an external quantum efficiency (EQE) of up to 190%.
This achievement is noteworthy as it surpasses the theoretical limit established by Shockley-Queisser efficiency for conventional silicon-based solar cells, which typically have a maximum EQE of 100%.
Chinedu Ekuma, a physics professor at Lehigh University and the author of the research paper, remarked, “This work signifies a significant advancement in our comprehension and advancement of sustainable energy solutions, showcasing innovative methods that could redefine solar energy efficiency and accessibility in the foreseeable future.”
The material's notable enhancement in efficiency can be attributed to a distinct attribute known as “intermediate band states.” These intermediate band states denote specific energy levels within the material's electronic structure, strategically positioned for effective conversion of light into energy.
Within this new material, the intermediate band states facilitate the capture of photon energy that traditional solar cells typically lose. Despite having EQE values of up to 100%, traditional cells experience losses of photon energy due to reflection and heat.
This achievement is noteworthy as it surpasses the theoretical limit established by Shockley-Queisser efficiency for conventional silicon-based solar cells, which typically have a maximum EQE of 100%.
Chinedu Ekuma, a physics professor at Lehigh University and the author of the research paper, remarked, “This work signifies a significant advancement in our comprehension and advancement of sustainable energy solutions, showcasing innovative methods that could redefine solar energy efficiency and accessibility in the foreseeable future.”
The material's notable enhancement in efficiency can be attributed to a distinct attribute known as “intermediate band states.” These intermediate band states denote specific energy levels within the material's electronic structure, strategically positioned for effective conversion of light into energy.
Within this new material, the intermediate band states facilitate the capture of photon energy that traditional solar cells typically lose. Despite having EQE values of up to 100%, traditional cells experience losses of photon energy due to reflection and heat.