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Cross-sectional schematic of the heterojunction LED mesa structure.
Room temperature photoluminescence spectra from the heterostructure before and after the growth of ZnO (N.B. the artifact at is due to filtering employed to block the second harmonic of the laser).
RT characteristics for the mesa structures. Differential resistance for each mesa area is also indicated on the graph.
RT log characteristics for the mesa structures.
EL spectra for heterostructure LED at RT for various forward drive currents.
Optical power output and operating voltage as functions of forward drive current for the largest and smallest of the heterojunction LED mesas.
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