| 摘要 |
A fluorescent material is described which remains uninfluenced in the presence of oxygen during fabrication, allows a highly efficient light emission due to the concentration of donors being adjustable as appropriate, and is excellent in giving a bright light and having a long life. The fluorescent material is represented by the formula Ga1-xInxN:M,X, wherein 0</=x<0.8, M is at least one element selected from the group of Be, Mg, Ca, Sr, Ba, Zn, Cd and Hg, and X is at least one element selected from the group of C, Si, Ge, Sn and Pb. The fluorescent material preferably has concentration ranges (mol %) of the elements M and X of 0.005<M<0.7 and 0.002<X<0.8. The starting materials utilized for preparing the fluorescent material are substances devoid of oxygen, preferably (SiHaNb)n where a=1-3, b=0 or 1, and n=an integer of 1 or more.
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