Phosphor and production method thereof phosphor-including member, and light emitting device or projector
Provided is a particulate phosphor including a single crystal having a composition represented by a compositional formula (Y 1-x-y-z Lu x Gd y Ce z ) 3+a Al 5−a O 12 (0≤x≤0.9994, 0≤y≤0.0669, 0.001≤z≤0.004, −0.016≤a≤0.315) and a particle diameter (D50) of not less than 20 μm. Also provided is a light-emitting device including a phosphor-including member that includes the phosphor and a sealing member including a transparent inorganic material sealing the phosphor or a binder including an inorganic material binding particles of the phosphor, and a light-emitting element that emits a blue light for exciting the phosphor.
1. A projector, comprising:
a phosphor-including member that comprises a particulate phosphor and a sealing member comprising a transparent inorganic material sealing the particulate phosphor or a binder comprising an inorganic material binding particles of the particulate phosphor;
a light-emitting element that emits a blue light for exciting the phosphor;
an image-forming section that forms an image by using a fluorescent light emitted from the phosphor-including member; and
a lens projecting the image formed by the image-forming section onto an external projection plane,
wherein the particulate phosphor comprises single crystal particles each having a composition represented by a compositional formula
( Y 1-x-y-z Lu x Gd y Ce z ) 3+a Al 5−a O 12 (0≤ x≤ 0.9994,0≤ y≤ 0.0669,0.001≤ z≤ 0.004,−0.016≤ a≤ 0.315),
and
wherein the particulate phosphor has a particle diameter (D50) of not less than 20 and not more than 120 μm.
2. The projector according to claim 1 , wherein the light-emitting element comprises a laser diode.