Thermoelectric Power of Some Organic Photoconducting Dyes

Publisher Website
Google Scholar
Abstract
The thermoelectric effect in several cationic‐dye photoconductors has been investigated. For all, there was an inverse relationship between illuminance and thermoelectric power. In the case of rhodamine‐B, the magnitude of the effect could be calculated from published kinetic and ESR data for this substance, using a localized‐process model. The effect of varying illuminance was ascribed to a logarithmic distribution of the characteristic trapping levels over a range of 0.12 eV. For crystal violet, the thermoelectric power calculated from a similar model is about 50% higher than that observed, for reasons unknown. Attempts to interpret the data in terms of a simple band model proved unsatisfactory.