Semiconductor Electrodes: X . Photoelectrochemical Behavior of Several Polycrystalline Metal Oxide Electrodes in Aqueous Solutions

Abstract

An investigation was made of the photoelectrochemical properties of several polycrystalline metal oxide electrodes prepared by chemical vapor deposition, direct oxidation of the metal, or heating of suitable metal salt solutions. Further data are given on the behavior of the previously discussed and electrodes including tunneling effects and the operation of the in a solar cell. Other n‐type materials studied were , , and . and showed good anodic photocurrents but only appeared stable. showed both n‐ and p‐type photocurrents, but had a poor stability. produced a good cathodic photocurrent (indicating p‐type behavior) with a photoresponse at wavelengths of 700 nm and below. Two other oxides, and , exhibited small p‐type photoeffects.