Abstract
The cathodoluminescence (CL) spectra of (CdS)4/(ZnS)16 superlattices are studied at room temperature. There are three peaks in the CL spectra. These emissions are the CL from GaAs at 850 nm and from the CdS quantum wells at 385 nm and at 453 nm. It is found that the CL measurement is one of the effective techniques to obtain the depth profile informations by varying the acceleration voltage of the probing electron beam. From the results of CL measurements at different acceleration voltage, the peak at 453 nm is ascribed to be the emission from the quantum level in four molecular layer CdS well. However, the 385 nm emission is speculated that the emission is due two molecular layer CdS well at the bottom side of the superlattice.
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