FLUORESCENT MATERIAL AND METHOD FOR PRODUCING THE SAME, FLUORESCENT MATERIAL CONTAINING COMPOSITION USING FLUORESCENT MATERIAL, AND IMAGE DISPLAY DEVICE USING LIGHT EMITTING DEVICE AND LIGHTING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a novel fluorescent material having nitrides of three elements of a monovalent element and a tetravalent element as a base crystal and having excellent conversion efficiency to blue light or near UV light and color purity and to provide a method for stably producing the nitride fluorescent material using metal silicon as a raw material without using a special high pressure device and without needing excessive high temperature treatment.;SOLUTION: The fluorescent material is represented by formula [1]. The fluorescent material is produced by using a metal sodium as a sodium source, a metal Si as an Si source and any of NaN₃, LiN₃ and N₂ gas as an N source and casting these raw materials together with an activation element Q in a reaction vessel and then heating the resultant materials. M^IM^IV₂N₃:Q [1] (wherein M^I denotes a metal element of Li, Na, K, Rb or Cs; M^IV denotes a tetravalent metal element belonging to the fourth group of periodic table or the fourteenth group of periodic table; and Q denotes an element of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm or Yb).;COPYRIGHT: (C)2011,JPO&INPIT