Cathodoluminescence at p-n Junctions in GaAs

Abstract
A decrease in the cathodoluminescence produced in GaAs by a scanning electron probe has been observed when the probe is close to a pn junction. The decreased intensity is shown to result from the drift of excess carriers across the junction. Measurements of the short‐circuit current of the diode confirm this interpretation and provide a means of estimating minority carrier diffusion lengths.

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