Sentences with phrase «move an electron strikes»
When a photon that has at least double the energy that is needed to move an electron strikes the lead selenide quantum dots, it can excite two or more electrons instead of letting the extra energy go to waste, generating more current than a conventional solar cell.
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APDs detect photons because when a photon strikes the top surface of the chip, its energy knocks an electron into an energy level in which it can move around freely.