Green electroluminescence from CdS–CuGaS2 heterodiodes

Abstract

Heterodiodes have been prepared by vapor-deposition expitaxy of n-type CdS on p-type CuGaS2. Typical diodes emit green light under forward bias with external quantum efficiencies of 0.1% at 77 °K and 0.001% at room temperature. The radiative recombination results from electron injection into the CuGaS2.