Apr

19

More Energy From Light Found to Make Hydrogen

April 19, 2017 | Leave a Comment

National Renewable Energy Laboratory (NREL) scientists have developed a proof-of-principle photoelectrochemical cell capable of capturing excess photon energy normally lost to generating heat. Using quantum dots (QD) and a process called Multiple Exciton Generation (MEG), the NREL researchers were able to push the peak external quantum efficiency for hydrogen generation to 114 percent. The advancement […]

Dec

23

A Method to See How Quantum Dot Photo Cells Work

December 23, 2014 | Leave a Comment

University of Oregon (UO) researchers have a new method to follow light into nanoparticle photocells in a spectroscopy experiment on photocells that used lead-sulfide quantum dots as photoactive semiconductor material. Its research that should prove to be of enormous consequence. The efficiency of conventional solar cells could be significantly increased from the current limit of […]

Dec

22

A Claim for 100%+ Solar Cell Efficiency

December 22, 2011 | Leave a Comment

A research team at the National Renewable Energy Laboratory (NREL) report in Science the first photovoltaic solar cell that produces a photocurrent that has an external quantum efficiency greater than 100% when photoexcited with photons from the high energy region of the solar spectrum. For comparison external quantum efficiency for photocurrent is usually expressed as […]

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