Electroluminescence in Al-Al2O3-Au diodes

Abstract

Thin‐film diodes composed of Al‐Al₂O₃‐Au films can be made to emit light under applied voltages. The spectral intensity of the electroluminescence was measured in the wavelength range 2000–6000 Å for different diode voltages. In this spectral range, the intensity was found to decrease nearly exponentially with increasing photon energy for a given voltage. The results also indicate that as the intensity of the short‐wavelength emission is enhanced with increasing diode voltage above approximately 4 V, there is a corresponding decrease in intensity in the long‐wavelength region. An attempt is made to explain the results in terms of a band model of the oxide.