Researchers at Boston college have observed the "hot electrons" effect in a solar cell for the first time and successfully harvested the elusive charges using ultra thin solar cells, opening a potential avenue to improved solar power efficiency.
when light is captured in solar cells, it generates free electrons in a range of energy states. But in order to snare these charges, the electrons must reach the bottom of the conduction band.
The problem has been that these highly energized "hot" electrons lose much of their energy to heat along the way.
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