萤光体和使用萤光体之发光器具

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本发明之课题在於提供一种无机萤光体，其具有可发出比习知之稀土类活化塞隆(sialon)萤光体更长波长之橙色或红色光之萤光特性。 ; 本发明系关於使用一种以具有与CaSiAlN3晶相相同之晶体构造之无机化合物作为母体晶体，并添加M(其中，M为选自Mn、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb以及Lu所组成一群之一种或二种以上之元素)作为发光中心而成之固溶体(solid solution)晶相萤光体，藉此设计富於红色成分之演色(color-rendering)性良好之白色发光二极体。 An object of the present invention is to provide an inorganic phosphor having fluorescence properties emitting an orange or red light which has a longer wavelength as compared with the cases of conventional sialon phosphors activated with a rare earth. The invention relates to a design of white light-emitting diode rich in a red component and having good color-rendering properties by employing a solid solution crystal phase phosphor which uses as a matrix crystal an inorganic compound having the same crystal structure as that of a CaSiAlN3 crystal phase and to which M (wherein M is one or two or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu) is added as an emission center.