Detector, linear photoconductive

Detectors based on some photoconductive or photovoltaic semiconductors have very high specific detectivities. These detectors utilize the phenomenon of photoexcitation in which electrons in valence (filled) bands are excited to conduction bands by absorbing the energy of radiation. They function at the temperature of liquid nitrogen (77 K) or a lower temperature. Many semiconductor detectors do not have a good linear response to incident radiation, because the saturation of signal current tends to occur. Among them. 

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