| abstract |
A fluorescence emitting device is provided using a phosphor emitting a light by bombardment of an electron beam and having excellent luminance lifetime. The electron beam excited phosphor comprises a solid solution prepared by an AIN crystal or AIN solid solution crystal formed with at least Eu, Si and oxygen represented by the composition formula Eua AIb Sic Nd Oe[Wherein a+b+c+d+e=1, and a, b, c, d and e satisfy the following conditions: 0.00001≦a≦0.1 0.4≦b≦0.55 0.001≦c≦0.1 0.4≦d≦0.55 0.001≦e≦0.1] |