OXYNITRIDE PHOSPHOR

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PROBLEM TO BE SOLVED : To provide an oxynitride phosphor having a light emission of a larger variety of wavelengths than before, while a SiAlON phosphor with an activated rare earth such as an Eu ion has been known to emit yellow light, when excited with blue light. SOLUTION : The oxynitride phosphor contains a crystal phase expressed by the general formula : La3Si8N11O4 or a crystal phase expressed by the general formula : La3Si8-xAlxN11-xO4+x (O

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