Hybrid fluorescent material and method of producing same

A method of producing a hybrid fluorescent material comprising:

• (A) providing fluorescent material particles by heat treatment of a raw material mixture containing oxides or compounds convertible to the oxides by the heat treatment that contain lutetium (Lu), aluminum (Al), and cerium (Ce), wherein a temperature of the heat treatment is in a range of 1000° C. to 2100° C.,
• (B) dispersing the fluorescent material particles obtained in (A) in a solution containing carbonate;
• (C) providing a solution containing a mixture of a first metallic salt containing at least one element selected from the group consisting of yttrium, gadolinium, and terbium, a second metallic salt containing aluminum or gallium, and a third metallic salt containing cerium;
• (D) mixing the solution obtained in (C) in the solution having the fluorescent material particles dispersed therein obtained in (B), to attach a fluorescent material precursor on surfaces of the fluorescent material particles obtained in (A), in order to obtain a hybrid fluorescent material precursor;
• (E) separating the hybrid fluorescent material precursor from the solution;
• and
• (F) calcining the hybrid fluorescent material precursor to obtain the hybrid fluorescent material in which the fluorescent material particles obtained in (A) are covered by a fluorescent material derived from the fluorescent material precursor attached to the surfaces on the fluorescent material particles in (D).