Semiconducting Oxide Glasses: General Principle for Preparation

A general principle for the preparation of semiconducting oxide glasses is presented. Some borates, phosphates, and germanates were prepared. The mechanism of electrical conduction was demonstrated to be electronic rather than ionic by (a) the absence of electrolysis, (b) the absence of electromotive force when the glass was used as an electrolyte, and (c) the magnitude of the activation energies for conduction.