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PURPOSE : An alkali-earth phosphorous nitride based fluorescent substance, a manufacturing method thereof, and an electroluminescence device using thereof with high color rendering index are provided to control color coordinate, color temperature, and color rendering index. CONSTITUTION : An alkali-earth phosphorous nitride based fluorescent substance is represented by chemical formula 1 : M1_a M2_b P_c N_d : A_e : A e or by chemical formula 2 : M1_a M2_b P_c N_d : A_e, R_f, X_g. Here, 0
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