Table 1.

The division of the materials by their photoconductive properties.

Type of Materials	Conductivity, Ohm−1 × cm−1	Content, cm−3	Charge Carrier Mobility, cm2 × V−1 × s−1
Metals	102…108	1022	103
Inorganic semiconductors	103…10−9	1011…1020	105…10−3
Organic semiconductors	102…10−14	106…1019	102…10−6
Dielectrics	Less than 10−14	Less than 109	Less than 10−4