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The Photo-Conductivity of Lead Chromate
Phys. Rev. 64, 11 – Published 1 July, 1943
DOI: https://doi.org/10.1103/PhysRev.64.11
Abstract
The variation of the photo-conductivity of lead chromate with wave-length of the exciting radiation is described. The conductivity referred to unit intensity of the incident radiation is a maximum in the blue corresponding to a value of 5× amp./watt at saturation. Subsidiary maxima occur in the red and the near ultraviolet. These results are in conflict with that of previous investigations. Data on the spectral scattering of lead chromate are also presented. The dependence of photo-conductivity on time, electric field, and previous history of the specimen are illustrated. On the basis of unit quantum efficiency, the mean displacement distance of photoelectrons in lead chromate is found to be 3× cm. Various alternative explanations of the observed behavior are discussed.
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