Abstract: In a phosphor according to an aspect, an emission site has a perovskite crystal structure expressed by ABX3, in which A and B are each a cation and X is an anion, and an emission element is located at a B site serving as a body center of the perovskite crystal structure.

Abstract: A phosphor is represented by the general formula aMIX·MII1-xMIMVO4:(Re)x where MI is at least one atomic element selected from the group consisting of K, Li, Na, Rb, Cs, Fr, Cu, and Ag, with K being essential; MII is at least one atomic element selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Mn, Zn, Cd, and Sn; MV is at least one atomic element selected from the group consisting of P, V, Nb, Ta, As, Sb, and Bi; X is at least one halogen element, with F being essential; Re is at least one atomic element selected from the group consisting of rare earth elements, with Eu being essential; and a is in the range 0.6?a?1.4.

Abstract: A composite material includes: an apatite crystal in the form of a tube; and a functional component accommodated in the apatite crystal tube and constituted by a material having physical properties different from those of the apatite crystal. The apatite crystal may be a monocrystal given by the general formula M25(PO4)3X, where M2 denotes at least one element selected from the group consisting of divalent alkali earth metals and Eu, and X denotes at least one element or molecule selected from the group consisting of halogens and OH.

Abstract: An adsorption method adsorbs a substance by using a tube-shaped apatite crystal. The apatite crystal may be a monocrystal given by a general formula M25(PO4)3X (M2 denotes at least one element selected from the group consisting of divalent alkali earth metal and Eu, and X denotes at least one element or molecule selected from the group consisting of halogen element and OH). The outer form of the apatite crystal may be a hexagonal prism in which the aperture of a hole formed on a top surface or bottom surface of the hexagonal prism may be hexagonal.

Abstract: A phosphor is represented by the general formula aMIX.MII1-xMIMVO4:(Re)x where MI is at least one atomic element selected from the group consisting of K, Li, Na, Rb, Cs, Fr, Cu, and Ag, with K being essential; MII is at least one atomic element selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Mn, Zn, Cd, and Sn; MV is at least one atomic element selected from the group consisting of P, V, Nb, Ta, As, Sb, and Bi; X is at least one halogen element, with F being essential; Re is at least one atomic element selected from the group consisting of rare earth elements, with Eu being essential; and a is in the range 0.6?a?1.4.

Abstract: An apatite crystal is a single crystal expressed by a general formula (M2)5(PO4)3X. In this formula, M2 indicates at least one type of element selected from the group consisting of bivalent alkaline-earth metals and Eu, and X indicates at least one type of element or molecule selected from the group consisting of halogen elements and OH. And the single crystal is of a tubular shape. The outer shape of the apatite may be a hexagonal prism. The shape of an opening of a hole formed in the upper surface or lower surface of the hexagonal prism may be a hexagon.

Abstract: An apatite crystal is a single crystal expressed by a general formula (M2)5(PO4)3X. In this formula, M2 indicates at least one type of element selected from the group consisting of bivalent alkaline-earth metals and Eu, and X indicates at least one type of element or molecule selected from the group consisting of halogen elements and OH. And the single crystal is of a tubular shape. The outer shape of the apatite may be a hexagonal prism. The shape of an opening of a hole formed in the upper surface or lower surface of the hexagonal prism may be a hexagon.

Abstract: A composite material includes: an apatite crystal in the form of a tube; and a functional component accommodated in the apatite crystal tube and constituted by a material having physical properties different from those of the apatite crystal. The apatite crystal may be a monocrystal given by the general formula M25(PO4)3X, where M2 denotes at least one element selected from the group consisting of divalent alkali earth metals and Eu, and X denotes at least one element or molecule selected from the group consisting of halogens and OH.

Abstract: An adsorption method adsorbs a substance by using a tube-shaped apatite crystal. The apatite crystal may be a monocrystal given by a general formula M25(PO4)3X (M2 denotes at least one element selected from the group consisting of divalent alkali earth metal and Eu, and X denotes at least one element or molecule selected from the group consisting of halogen element and OH). The outer form of the apatite crystal may be a hexagonal prism in which the aperture of a hole formed on a top surface or bottom surface of the hexagonal prism may be hexagonal.

Abstract: An apatite crystal is a single crystal expressed by a general formula (M2)5(PO4)3X. In this formula, M2 indicates at least one type of element selected from the group consisting of bivalent alkaline-earth metals and Eu, and X indicates at least one type of element or molecule selected from the group consisting of halogen elements and OH. And the single crystal is of a tubular shape. The outer shape of the apatite may be a hexagonal prism. The shape of an opening of a hole formed in the upper surface or lower surface of the hexagonal prism may be a hexagon.

Abstract: A light emitting device is configured to achieve a white color by mixing light from respective phosphors. The light emitting device includes: a light emitting element for emitting ultraviolet or short-wavelength visible light having a peak wavelength in a wavelength range of 380 to 420 nm; a first phosphor excited by the ultraviolet or short-wavelength visible light to emit visible light having a peak wavelength in a wavelength range of 560 nm to 600 nm; a second phosphor excited by the ultraviolet or short-wavelength visible light to emit visible light having a complementary relationship with visible light emitted by the first phosphor; and a light transmitting member which is a light transmitting layer for covering the light emitting element, and has the first phosphor and the second phosphor dispersed therein.

Abstract: In a light wavelength conversion member, a translucent member encapsulates a yellow phosphor and a blue phosphor. The yellow phosphor is excited by light ranging from near-ultraviolet light to short-wavelength visible light whose dominant wavelength is 350 nm to 480 nm and then emits yellow light. The blue phosphor is excited by light ranging from near-ultraviolet light to short-wavelength visible light whose dominant wavelength is 350 nm to 480 nm and then emits blue light. The difference in refractive index between each of the yellow phosphor and the blue phosphor and the translucent member is less than or equal to 0.2.

Abstract: A light emitting module includes a light emitting device that emits ultraviolet rays or short-wavelength visible light, a blue phosphor that is excited by the ultraviolet rays or the short-wavelength visible light to emit visible light. The blue phosphor is represented by a general formula of (Ca1-x-y,Srx,Euy)5(PO4)3Cl, wherein 0.10<x<0.60, 0.002<y<0.060, and 0.02<y/(x+y)<0.17.

Abstract: A light emitting module includes a light emitting device that emits ultraviolet rays or short-wavelength visible light, a blue phosphor that is excited by the ultraviolet rays or the short-wavelength visible light to emit visible light. The blue phosphor is represented by a general formula of (Ca1-x-y,Srx,Euy)5(PO4)3Cl, wherein 0.10<x<0.60, 0.002<y<0.060, and 0.02<y/(x+y)<0.17.

Abstract: A light emitting device is configured to achieve a white color by mixing light from respective phosphors. The light emitting device includes: a light emitting element for emitting ultraviolet or short-wavelength visible light having a peak wavelength in a wavelength range of 380 to 420 nm; a first phosphor excited by the ultraviolet or short-wavelength visible light to emit visible light having a peak wavelength in a wavelength range of 560 nm to 600 nm; a second phosphor excited by the ultraviolet or short-wavelength visible light to emit visible light having a complementary relationship with visible light emitted by the first phosphor; and a light transmitting member which is a light transmitting layer for covering the light emitting element, and has the first phosphor and the second phosphor dispersed therein.

Abstract: A phosphor includes a composition represented by the formula: (M2x, M3y, M4z)mM1O3X(2/n), wherein M1 is Si and may include at least one element selected Ge, Ti, Zr, and Sn; M2 is Ca and may include at least one element selected Mg, Ba, and Zn; M3 is Sr and may include at least one element selected from the group consisting of Mg, Ba, and Zn; X is at least one kind of halogen element; M4 is Eu2+ and may includes at least one element rare-earth elements and Mn, wherein m is in a range of 6/6?m?8/6; n is in a range of 5?n?7; and x, y, and z satisfies x+y+z=1, where 0<x<1, 0<y<1, and 0.01?z?0.3.

Abstract: A light emitting device is provided. The light emitting device includes a light emitting element that emits ultraviolet light or short-wavelength visible light; and at least one phosphor that is excited by the ultraviolet light or short-wavelength visible light to emit visible light. The at least one phosphor includes a first phosphor including a composition represented by the formula: M1O2.aM2O.bM3X2:M4, where M1 is at least one element selected from the group consisting of Si, Ge, Ti, Zr, and Sn; M2 is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; M3 is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; X is at least one halogen element; M4 is at least one element essentially including Eu2+ selected from the group consisting of rare-earth elements and Mn; a is in the range of 0.1?a?1.3; and b is in the range of 0.1?b?0.25.

Abstract: A phosphor includes a composition represented by the formula: (M2x, M3y, M4z)mM1O3X(2/n), wherein M1 is Si and may include at least one element selected Ge, Ti, Zr, and Sn; M2 is Ca and may include at least one element selected Mg, Ba, and Zn; M3 is Sr and may include at least one element selected from the group consisting of Mg, Ba, and Zn; X is at least one kind of halogen element; M4 is Eu2+ and may includes at least one element rare-earth elements and Mn, wherein m is in a range of 6/6?m?8/6; n is in a range of 5?n?7; and x, y, and z satisfies x+y+z=1, where 0<x<1, 0<y<1, and 0.01?z?0.3.

Abstract: A phosphor is provided. The phosphor includes a composition represented by the formula: M1O2.aM2O.bM3X2:M4,where M1 is at least one element selected from the group consisting of Si, Ge, Ti, Zr, and Sn; M2 is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; M3 is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; X is at least one halogen element; M4 is at least one element essentially including Eu2+ selected from the group consisting of rare-earth elements and Mn; a is in the range of 0.1?a?1.3; and b is in the range of 0.1?b?0.25.

Abstract: A light emitting device is provided. The light emitting device includes a light emitting element that emits ultraviolet light or short-wavelength visible light; and at least one phosphor that is excited by the ultraviolet light or short-wavelength visible light to emit visible light. The at least one phosphor includes a first phosphor including a composition represented by the formula: M1O2.aM2O.bM3X2:M4, where M1 is at least one element selected from the group consisting of Si, Ge, Ti, Zr, and Sn; M2 is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; M3 is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; X is at least one halogen element; M4 is at least one element essentially including Eu2+ selected from the group consisting of rare-earth elements and Mn; a is in the range of 0.1?a?1.3; and b is in the range of 0.1?b?0.25.