Electroluminescent device and oxide phosphor for use therein

摘要

The present invention provides an oxide phosphor for use in an electroluminescent device, which phosphor is capable of providing a high-luminance EL device while the composition thereof is controlled to be as simple as possible, and which phosphor attains multi-color and full-color light emissions without the need for treatment at a high temperature greatly in excess of 1,000 DEG C. The invention also provides an electroluminescent device employing the phosphor. The oxide phosphor for use in an electroluminescent device is formed from an yttrium (Y) oxide as a matrix and at least one transition metal element as an activator, or from a Y-Ge-O oxide or a Y-Ge-Si-O oxide as a matrix and at least one metallic element, as a luminescence center, selected from among transition metal elements and rare earth metal elements.