Photoconductivity

The basic factors influencing photoconductivity are first discussed, and the general pattern of behaviour to be expected is indicated. The preparation and properties of cadmium sulphide are then dealt with in some detail. Other photoconducting compounds are described more briefly, and it is shown that their properties also fit into the general pattern. Following a discussion of the nature of the impurities and defects in the crystal lattice which influence the sensitivity, the applications of photoconductors are outlined briefly.