FLUORESCENT SUBSTANCE

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The present invention relates to a novel fluorescent substance. The fluorescent substance according to the present invention is represented by the chemical formula of aM^IX· M^II_(1-x)M^IM^VO_4 : (Re)_x, wherein M^I represents at least one element selected from the group consisting of K, Li, Na, Rb, Cs, Fr, Cu and Ag and essentially comprising K; M^II represents at least one element selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Mn, Zn, Cd and Sn; M^V represents at least one element selected from the group consisting of P, V, Nb, Ta, As, Sb and Bi : X represents at least one halogen element essentially comprising F; Re represents at least one element selected from the group of rare earth elements essentially comprising Eu; and a satisfies 0.6 (AA) Luminescence intensity [a.u.](BB) Wavelength [nm]COPYRIGHT KIPO 2017