Method for obtaining luminescence in a visible wavelength range by using an electroluminescent mater

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The present invention provides electroluminescent materials that emit very bright light with little energy consumption, little loss of energy converted into heat, etc., and suffers from little deterioration due to long-term use, in particular, inorganic electroluminescent materials that emit blue to green light having a wavelength shorter than yellow. Specifically, the present invention relates to the following three types of electroluminescent material : (1) An electroluminescent material including an oxide having a perovskite-type crystal structure represented by General Formula RMO 3 , wherein R is at least one rare-earth element, and M is at least one member selected from the group consisting of Al, Mn, and Cr; (2) an electroluminescent material including an oxide having a perovskite-type crystal structure represented by General Formula R 2 CuO 4 , wherein R is at least one rare-earth element; and (3) an electroluminescent material including an oxide having a perovskite-type crystal structure represented by General Formula RZ 2 Cu 3 O 6 , wherein R is at least one rare-earth element, and Z is at least one alkali-earth metal.