Injection light-emitting diodes based on low-resistance ZnS with blue and green emission
Pekar' G.S., Luk'yanchikova N.B., Hoang Mi Shin, Sheinkman M.K.
In metal-semiconductor diodes based on low-resistance ZnS single crystals, we observed at room temperature a sufficiently intense and stable blue and green electroluminescence, registered when a positive bias U > 2 V was applied to the diodes and apparently due to injection of holes into the ZnS from the metallic contact. In the dc interval 10~5-10~1 A, the external quantum yield of the luminescence was 10~4 quantum/electron when Au was used as the injecting contact.