Phosphor and method for manufacturing the same, and light-emitting device and display device using phosphor

A method for manufacturing a phosphor including (Sr1−x, Bax)3SiO5 as a base material and europium (Eu) as an activator, comprising:

• preparing a mixture of compounds respectively including Sr, Ba, Si, and Eu, such that a molar ratio of Sr, Ba, and Si is Sr:Ba:Si=3(1−x):3x:1 where 1>x≧0.1, and a ratio of the number of moles of Eu to a total number of moles of Sr, Ba, and Eu is 0.02 or more and 0.08 or less;
• and
• firing the mixture at 1300° C. or more and 1700° C. or less,
• wherein an emission center wavelength is controlled to be 600 nm or more on the basis of a composition ratio of Sr, Ba, and Eu.

A light-emitting device comprising a phosphor including

• (Sr1−x, Bax)3SiO5 with 1>x≧0.1 as a base material;
• and
• europium (Eu) as an activator,
• wherein an emission center wavelength is controlled to be 600 nm or more on the basis of a composition ratio of Sr, Ba, and Eu.

A display device comprising a light-emitting device that includes a phosphor, as a light source used for irradiating a display section, the phosphor including

• (Sr1−x, Bax)3SiO5 with 1>x≧0.1 as a base material;
• and
• europium (Eu) as an activator,
• wherein an emission center wavelength is controlled to be 600 nm or more on the basis of a composition ratio of Sr, Ba, and Eu.