Patent ID: 6806503
Filing Date: 2004-10-19
Classification: H01L,H01S

Abstract:
An ultraviolet-light-emitting diode comprising:an n-type ZnO layer formed on a transparent substrate and exhibiting only intrinsic luminescence in the vicinity of a band gap thereof, and a p-type semiconductor layer selected from the group consisting of SrCu2O2, CUAlO2 and CuGaO2, said p-type layer being formed on said n-type ZnO layer to provide a p-n junction therebetween, wherein said transparent substrate is yttria-stabilized zirconia (YSZ) (111) single crystal substrate having an atomically flat surface, wherein said light-emitting diode further includes an indium-tin oxide (ITO) layer heteroepitaxially grown on said transparent substrate to serve as a transparent negative electrode layer, and wherein the ZnO layer is heteroepitaxially grown on the ITO layer to serve as a luminescent layer, the p-type semiconductor layer being formed on said ZnO layer to serve as a hole-injection layer.