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Presents information on a study which investigated the photoconductive effect of carbon films prepared by plasma decomposition of propylene for infrared radiation. Deposition of carbon films; Configurations of electrodes; Observations on carbon films on glass substrates; Photovoltaic effect both for infrared radiation and visible radiation; Ratios of the photocurrent for the infrared radiation to the dark current.

Presents a study which investigated the relation between electrical conductivity and an infrared absorption parameter of carbons derived from polymers. Details on the experiment; Results; Conclusion.

Focuses on a study which investigated the iron containing carbon films for the effect of iron on the photoresponse of a light emitting diode. Experiment; Dependence of photocurrent on iron content; State of iron in carbon matrix.

Bromanil (BA) doping of a naphthalene pitch, a kind of soluble carbonaceous material, enhanced the photoresponse of the junction between this material and a ρ-type silicon substrate by about tenfold. Morphological and spectroscopic studies revealed that the enhancement was partly caused by an increase in the surface roughness of the carbonaceous films, and by the enhanced dissociation of excitons in the carbonaceous films upon the BA doping. [ABSTRACT FROM AUTHOR]