Current-Capacitance Characteristics of Metal Rectifiers

Using a substitution bridge method, the reverse current-voltage and capacitance-voltage characteristics of metal rectifiers have been measured at room and liquid air temperatures. At low temperatures the capacitance of Cu 2 O and Se rectifiers, and the reverse current of the former, decrease, but that of the latter increases. The capacitance-voltage characteristics seem to be in good agreement with Landsberg's heterogeneous barrier layer theory, and the comparison of the experimental results with this theory gives effective dielectric constants of 4.3 and 2.0~4.3 for the barrier materials of Cu 2 O and Se rectifiers, respectively.