Fluorescent material and light-emitting device

A fluorescent material comprising a light-storing first phosphor that at least partially absorbs energy emitted by an excitation source, which emits ultraviolet having a wavelength of about 365 nm, to emit phosphorescence, and a second phosphor that partially absorbs the phosphorescence of the first phosphor and converts the wavelength thereof to emit fluorescence,

• the fluorescent material being able to emit light having a spectrum created by the combination of the portion of the phosphorescence of the first phosphor not absorbed by the second phosphor and the fluorescence of the second phosphor,
• wherein the second phosphor is at least one type selected from the group consisting of
• (YzGd1−z)3Al5O12:Ce, wherein z is a number that satisfies 0<z≦1, and
• (A1−aSma)3A′5O12:Ce, wherein A is at least one type selected from the group consisting of Y, Lu, Sc, La, Gd, Pr and Tb, A′ is at least one type selected from the group consisting of Al, Ga and In, and a is a number that satisfies 0≦a<1, and
• a peak wavelength of the emission spectrum of the first phosphor and a peak wavelength of the emission spectrum of the second phosphor have a relation of complementary colors so that when the light created due to the peak wavelength of the first phosphor and the light created due to the peak wavelength of the second phosphor are mixed, the resulting light is in the white region.

A fluorescent material comprising a light-storing first phosphor that at least partially absorbs energy emitted by an excitation source, which emits ultraviolet having a wavelength of about 365 nm, to emit phosphorescence, and a second phosphor that partially absorbs the phosphorescence of the first phosphor and converts the wavelength thereof to emit fluorescence,

• the wavelength range of the emission spectrum of the first phosphor at least partially overlapping with the wavelength range of the excitation spectrum of the second phosphor,
• wherein the second phosphor is at least one type selected from the group consisting of
• (YzGd1−z)3Al5O12:Ce, wherein z is a number that satisfies 0<z≦1, and
• (A1-aSma)3A′5O12:Ce, wherein A is at least one type selected from the group consisting of Y, Lu, Sc, La, Gd, Pr and Tb, A′ is at least one type selected from the group consisting of Al, Ga and In, and a is a number that satisfies 0≦a<1, and
• a peak wavelength of the emission spectrum of the first phosphor and a peak wavelength of the emission spectrum of the second phosphor have a relation of complementary colors so that when the light created due to the peak wavelength of the first phosphor and the light created due to the peak wavelength of the second phosphor are mixed, the resulting light is in the white region.