Photovoltaic properties of polymer/Fe2O3/polymer heterostructured microspheres

The photovoltaic characteristics of Fe2O3 particles with diameters of 3-5 nm were observed by using transmission electron microscope images. Surface photovoltage spectroscopy was used to study the photovoltaic reactions of the polymer composites, which materialized only when there was an external electric field and if its decay was slower than the Fe2O3 particles. This condition was explained by a reasonable energy band model and it was also suggested that a polymer shell became an electric-passivation layer of the semiconductor Fe2O3 particles.