National Institute for Materials Science

Sumitomo Chemical Company, Limited

Nichia Corporation

National Institute of Materials Science

Takashi Takeda

Naoto Hirosaki

Shiro Funahashi

Eiichirou Narimatsu

Susumu Miyazaki

Keiji Ono

Shoji Hosokawa

Kenji Toda

Takayuki Shinohara

Yuichi Michiue

Mineo Sato

Kenji Ono

Provided are a new phosphor having emission characteristics different from the conventional nitride or oxynitride phosphor, a manufacturing method, and a light-emitting device. In an embodiment, the phosphor may include inorganic substance having crystal represented by A(D, E)Xincluding at least A, D, X (A is at least one kind of element selected from Mg, Ca, Sr, and Ba; and D is Si, and X is at least one kind of element selected from O, N, and F); and further includes, if necessary, E (E is at least one kind of element selected from B, Al, Ga, and In) wherein the crystal further includes M (M is at least one kind of element selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb). Upon irradiation of excitation source, the maximum value of emission peak in a wavelength range from 630 nm to 850 nm may occur.

Fluorescent body, method for manufacturing same, and light-emitting device using same

A phosphor, combined with LED having not exceeding 470 nm, of high emission intensity and with chemical and thermal stability is provided. The phosphor according to the present invention comprises an inorganic compound in which element A (A is one or two or more kinds of elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb) is solid solved in an inorganic crystal including at least metal element M and non-metal element X and represented by MnXn+1 (3&#x2264;n&#x2264;52), an inorganic crystal having the same crystal structure, or an inorganic crystal including a solid solution thereof. Here, M comprises at least Al and Si, and if necessary element L (L is a metal element other than Al and Si) and X comprises N, O if necessary, and element Z if necessary (Z is a non-metal element other than N and O).

Phosphor, method for production same, light emitting device, image display, pigment and ultraviolet light absorber

Provided are a fluorescent material including a high light emission intensity and a light emitting device using the same. The present fluorescent material includes at least an A element, a M element, a D element, a E element, and an X element, wherein the A element is at least one element selected from the group consisting of Sr, Mg, Ca, and Ba; the M element is at least one element selected from the group consisting of Eu, Mn, Ce, Pr, Nd, Sm, Tb, Dy, and Yb; the D element is at least one element selected from the group consisting of Si, Ge, Sn, Ti, Zr, and Hf, the E element is at least one element selected from the group consisting of Al, B, Ga, In, Sc, Y, and La; the X element is at least one element selected from the group consisting of O, N, and F; and a molar ratio of the M element to the sum of the A element and the M element [M/(A+M)] is 0.06 or less.

Fluorescent material and light emitting device

Provided are an oxynitride phosphor comprising a JEM crystal as a main component and being characterized by light-emitting properties (light emission color or excitation property, light emission spectrum) that is different from the known JEM phosphor, and an application thereof. The phosphor of the present invention comprises the JEM crystal activated with Eu and represented by MAl(Si, Al)(O, N)(where the M element is one or more elements selected from the group consisting of Ca, Sr, Eu, La, Sc, Y, and lanthanoid elements; and includes at least Eu as well as Ca and/or Sr).

Phosphor, light-emitting device, image display device, pigment, and ultraviolet absorber

A phosphor having different light emission characteristics from the conventional phosphor, having high emission intensity and chemical and thermal stability, combined with LED of less than 450 nm. This phosphor includes an inorganic compound comprising: a crystal represented by BaSiAlN, an inorganic crystal having the same crystal structure as BaSiAlNcrystal, or a solid solution crystal thereof, comprising A element, D element, E element, and X element (A is one or more elements selected from Li, Mg, Ca, Sr, Ba, and La; D is one or more elements selected from Si, Ge, Sn, Ti, Zr, and Hf; E is one or more elements selected from B, Al, Ga, In, Sc, and Y; X is one or more elements selected from O, N, and F), into which M element is solid-solved (M is one or more elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb).

Phosphor, production method for same, light-emitting device, image display device, pigment, and ultraviolet absorber

Provided is fluorophore comprising: inorganic compound having: an inorganic crystal, where M element (M is one or more elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb) is solid solved, having the same crystal structure as the crystal represented by CaSiON(including CaSiONcrystal or a solid solution thereof where one or more elements selected from Mg, Sr, Ba, Ge, Sn, Ti, Zr, Hf, B, Al, Ga, In, Sc, Y, La, and F are solid solved) and comprising: A element, D element, X element, and, if necessary, E element (A is one or more elements selected from Mg, Ca, Sr, and Ba; D is one or more elements selected from Si, Ge, Sn, Ti, Zr, and Hf; E is one or more elements selected from B, Al, Ga, In, Sc, Y, and La; and X is one or more elements selected from O, N, and F).

Fluorophore, method for producing same, light-emitting device using fluorophore, image display device, pigment, and ultraviolet absorbent

Provided is a chemically and thermally stable phosphor having different light-emitting characteristics than a conventional phosphor and having high light-emitting intensity even when combined with an LED of 410 nm or lower. The phosphor comprises an inorganic compound in which an inorganic crystal including A element, D element, X element (A is one or more elements selected from Mg, Ca, Sr, and Ba; D is one or more elements selected from Si, Ge, Sn, Ti, Zr, and Hf; and X is one or more elements selected from O, N, and F), and, if necessary, E element (where E is one or more elements selected from B, Al, Ga, In, Sc, Y, and La) includes Li element and M element (where M is one or more elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb).

Inorganic phosphor, manufacture thereof, light-emitting device, and image display utilizing inorganic phosphor

To provide a phosphor being chemically-thermally stable and having high luminous intensity if combined with LED of not exceeding 470 nm. A phosphor of the present invention includes: inorganic compound including: a crystal represented by LiBaAlSiN; a crystal represented by (Li, A)(D, E)X; and an inorganic crystal having the same crystal structure as the crystal represented by LiBaAlSiN; and a solid-solution crystal thereof, which contains Li, A, D, E, and X elements (A represents at least one selected from Mg, Ca, Sr, Ba, Sc, Y and La; D represents at least one selected from Si, Ge, Sn, Ti, Zr and Hf; E represents at least one selected from B, Al, Ga and In; and X represents at least one selected from O, N and F), wherein M element (M represents at least one selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy and Yb) is solid-solved into each.

Phosphor, method for producing same, light emitting device, and image display device

Provided is chemically and thermally stable phosphor having light-emitting characteristics different from the conventional phosphor and high emission intensity when combined with LED of not exceeding 470 nm. The phosphor comprises inorganic compound having crystal represented by A(D,E)X; crystal represented by CaSiON; or inorganic crystal having the same crystal structure as crystal represented by CaSiON, which includes A, D, E, and X elements (A is one or more kinds selected from Mg, Ca, Sr, and Ba; D is one or more kinds selected from Si, Ge, Sn, Ti, Zr, and Hf; E is one or more kinds selected from B, Al, Ga, In, Sc, Y, and La; and X is one or more kinds selected from O, N, and F), in which M element (M is one or more kinds of elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb) is solid-solved.

Fluorophore, method for producing same, light-emitting device, and image display device

A chemically and thermally stable phosphor having unconventional light emitting properties and high light emitting intensity with an LED of 470 nm or less, includes an inorganic compound comprising: a crystal designated by A(D,E)X, a crystal designated by SrSiONor an inorganic crystal having the identical crystal structure of the SrSiONcrystal, which comprises A element, D element, X element, and optionally E element if necessary (A is one or more kinds selected from Li, Mg, Ca, Sr, and Ba; D is one or more kinds selected from Si, Ge, Sn, Ti, Zr, and Hf; X is one or more kinds selected from O, N, and F; and E is one or more kinds selected from B, Al, Ga, In, Sc, Y, and La.), into which M element is solid-solved (M is one or more kinds selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb.).

Phosphor, method for manufacturing same, light emitting device, and image display device

Provided is a chemically and thermally stable phosphor having different emission characteristics than the conventional phosphor and exhibiting high emission intensity if combined with an LED of 470 nm or less. The phosphor of the present invention is represented by a composition formula: MADEX(d+e+f+g+h=1; M is one or more kinds of elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb; A is one or more kinds of elements selected from Mg, Ca, Sr, and Ba; D is one or more kinds of elements selected from Si, Ge, Sn, Ti, Zr, and Hf; E is one or more kinds of elements selected from B, Al, Ga, In, Sc, Y, and La; and X is one or more kinds of elements selected from O, N, and F) and parameters d, e, f, g, and h satisfy the predetermined condition.

Phosphor, manufacture thereof; light-emitting device, and image display device utilizing phosphor

Provided is a chemically-thermally stable phosphor having different emission characteristics from the conventional and exhibiting high emission intensity with an LED of 470 nm or less. A phosphor of the present invention includes an inorganic crystal of a crystal represented by SrSiAlON, another inorganic crystal represented by A(D,E)Xand having the same crystal structure as SrSiAlON, and/or a solid-solution crystal thereof, all with M (one or more kinds of elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb) being solid-solved, wherein A is one or more kinds selected from Mg, Ca, Sr and Ba; D is one or more kinds selected from Si, Ge, Sn, Ti, Zr and Hf; E is one or more kinds selected from B, Al, Ga, In, Sc, Y and La; and X is one or more kinds selected from O, N and F.

Phosphor, manufacture thereof, light-emitting device, and image display device

A phosphor having high luminescence when excited by vacuum ultraviolet ray and a vacuum ultraviolet radiation excited light-emitting device comprising the phosphor. The phosphor comprises a metal oxide comprises at least one metal element Mselected from the group consisting of Ca, Sr and Ba, at least one metal element Mselected from the group consisting of Y, La, Gd and Lu, at least one metal element Mselected from the group consisting of Si and Ge and oxygen, and at least one metal element Lnselected from the group consisting of Ce, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Mn, as an activator.

Phosphor and vacuum ultraviolet excited luminescent element

The object of the present invention is to provide a production method for a silicate phosphor having high brightness. This object is achieved by the method for producing a silicate phosphor comprising a step of calcining a mixture of metal compounds, wherein one of the metal compounds is silicon oxide having BET specific surface area of not less than 10 m/g.

Method for producing silicate phosphor

A fluorescent substance for vacuum ultraviolet radiation excited light-emitting devices which emits light with a high luminance and is subject to only a small decrease in luminance due to exposure to plasma or the like, and a vacuum ultraviolet radiation excited light-emitting device including the fluorescent substance are provided. The fluorescent substance is represented by the general formula: mM O&middot;nM O&middot;2M O wherein M is at least one metal selected from the group consisting of Ca, Sr and Ba, M is at least one metal selected from the group consisting of Mg and Zn, M is at least one metal selected from the group consisting of Si and Ge, and m and n satisfy 0.5&lE;m&lE;3.5 and 0.5&lE;n&lE;2.5, respectively. Either Eu and Mn can be used as an activator.

Growing community of inventors

Ibaraki, Japan

Takashi Takeda