BLUE-GREEN LASER-DIODES AND LIGHT-EMITTING-DIODES

We report the properties of blue/green laser diodes and light emitting diodes based on ZnSe-related II-VI semiconductor heterostructures. Fo r blue/green laser diodes, threshold voltages for stimulated emission as low as 12 V at 77 K have been achieved using HgSe ohmic contacts. D ifferential quantum efficiencies as large as 36% per (uncoated) facet has been obtained for some of the laser diodes. Stimulated emission at wavelengths as short as 467.5 nm has been observed at 77 K. In additi on, blue/green LED encapsulated lamps have been.fabricated and tested. Power efficiencies as large as 7 x 10(-4) have been obtained at 300 K for green LEDS which employ ZnSTeSe quantum wells. These devices exhi bit power efficiencies greater than one percent (>10(-2)) in the tempe rature range 120-200 K.