Tunable electroluminescence from n-ZnCdO/p-GaN heterojunction Original Research Article

By cadmium allowing of zinc oxide, a phosphor-free single-chip white light emission diode based on n-ZnCdO/p-GaN heterostructure has been realized. The white light electroluminescence was produced by the superposition of two intense emission bands, a blue band and a yellow band. The origins of the blue band was contributed by both GaN and ZnCdO, while the yellow band was from the recombination of the holes and the electrons in the interface of GaN and ZnCdO.