Oxygen Induced Photoconductivity in Lead Phthalocyanine

Abstract

Photoconductive properties (photoresponse, dependences of photocurrent on temperature and light intensity, etc.) of lead phthalocyanine single crystal doped with various levels of oxygen were measured and the role of oxygen in the generation and the recombination of photocarriers was studied. Experimental results are explained on the model that a hole-like carrier is indirectly photo-generated via the charge transfer state at an oxygen center and recombines with the ionized oxygen.