| 摘要 |
A phosphor (1) comprises a base material composed of nanoparticles each having a particle diameter of 5 nm or less and a luminescence center element, e.g., Eu, contained in the base material. The base material comprises an oxide containing an alkali earth metal element, e. g., Ti and Ba. The phosphor (1) can be produced by preparing a nanoparticle dispersion solution in which nanoparticles each comprising a Ti oxide, an alkali earth metal oxide and an oxide containing a luminescence center element are dispersed in a dispersion solution, applying the nanoparticle dispersion solution onto a substrate (2) to form a coating film, and then thermally treating the coating film at a low temperature equal to or lower than 500˚C. The nanoparticle dispersion solution may be prepared employing a microemulsion method. In this manner, a phosphor which has good luminous efficiency and a phosphor production method which makes it possible to produce the phosphor readily at low cost can be achieved. |
