extrinsic photoconductivity

extrinsic photoconductivity

[ek¦strinz·ik ‚fō·dō·kän·dək′tiv·əd·ē]
(electronics)
Photoconductivity that occurs for photon energies smaller than the band gap and corresponds to optical excitation from an occupied imperfection level to the conduction band, or to an unoccupied imperfection level from the valence band, of a material.