= Two-photon photovoltaic effect
{wiki=Two-photon_photovoltaic_effect}
The two-photon photovoltaic (TPPV) effect refers to a process in which two photons are simultaneously absorbed by a semiconductor material, leading to the generation of an electrical current. Unlike the traditional photovoltaic effect, where a single photon creates an electron-hole pair (exciton) that can contribute to electrical conduction, the TPPV effect specifically involves the absorption of two photons such that their combined energy exceeds the bandgap energy of the semiconductor.
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