Properties of PbS-PbO Crystalline Films. II. Electrical and Photoelectronic Properties.

摘要

Electrical, optical, and photoconductive studies were carried out PbS-PbO codeposited films. The segregated PbO microcrystallites had an increasingly profound effect on these properties. Some traces of the excess oxygen appear to enter the PbS single-crystal matrix. Oxygen vacancies in the PbO crystallites produces a peak in the photoconductivity of p-type PbS-PbO films but not in n-type films. By a detailed study of these properties, a band diagram is suggested for the PbS-PbO heterostructure that accounts for our observations. (Author)