Abstract:
A phosphor material according to an embodiment of the present disclosure contains a major component represented by the formula A2-v-w-x-yBvLnwEuxSmyM2-zDzO8, where A is one or more elements selected from the group consisting of alkaline-earth metal elements; B is one or more elements selected from the group consisting of alkali metal elements; Ln is one or more elements selected from the group consisting of rare-earth elements other than Eu and Sm; M is one or more elements selected from the group consisting of W and Mo; D is one or more elements selected from the group consisting of Nb and Ta; and v, w, x, y, and z satisfy the inequalities 0≦v≦0.5, 0.15≦x+y≦0.7, 0≦y≦0.05, and 0
Abstract:
Provided is a wavelength conversion member capable of improving brightness of a light source device. Wavelength conversion member according to the present disclosure includes: first phosphor layer that is disposed on an incidence side where excitation light enters, and contains a plurality of first phosphor particles; and second phosphor layer that is disposed on a side reverse to the incidence side and contains a plurality of second phosphor particles. First phosphor particles include an activation component, second phosphor particles include an activation component same as or different from the activation component included in first phosphor particles, and a concentration of the activation component in first phosphor layer is lower than a concentration of the activation component in second phosphor layer.
Abstract:
A fluorescent material according to an aspect of the present disclosure mainly comprises a compound represented by AB0.5-w-x-y-zCwEuxSmyLnzW0.5O3. A is one or more elements selected from the group consisting of alkaline earth metals and mainly contains Ca. B is one or more elements selected from the group consisting of divalent metals and mainly contains Mg. C is one or more elements selected from the group consisting of alkali metals and mainly contains Li, Na, or Li and Na. Ln is one or more elements selected from the group consisting of rare earth elements excluding Eu and Sm. w, x, y, and z meet the following conditions: 0.05≦w≦0.25, 0.05≦x+y≦0.25, 0.0≦y≦0.02, and w=x+y+z.
Abstract translation:根据本公开的一个方面的荧光材料主要包含由AB0.5-w-x-y-zCwEuxSmyLnzW0.5O3表示的化合物。 A是选自碱土金属和主要含有Ca的一种或多种元素。 B是选自二价金属和主要含有Mg的一种或多种元素。 C是选自碱金属中的一种或多种元素,主要含有Li,Na或Li和Na。 Ln是选自除了Eu和Sm之外的稀土元素的一种或多种元素。 w,x,y和z满足以下条件:0.05≦̸ w≦̸ 0.25,0.05≦̸ x + y≦̸ 0.25,0.0& nlE; y≦̸ 0.02,w = x + y + z。
Abstract:
A phosphor includes a host crystal including Sr3MgSi2O8 crystal and SrMgSiO4 crystal and also includes Eu2+, or Eu2+ and Mn2+ as luminescent centers. Alternatively, a phosphor includes a host crystal including Sr3MgSi2O8 crystal and SrMgSiO4 and also includes Eu2+ as a luminescent center, the phosphor being free from Mn2+ as a luminescent center. A light-emitting device includes a phosphor layer containing the phosphor. A projector and a vehicle include the light-emitting device.
Abstract:
A light source device includes: an excitation light source that emits excitation light having an energy density of 10 W/mm2 or more; and a phosphor layer that has phosphor particles embedded in the matrix. The phosphor particles include at least one selected from the group consisting of metal oxides represented by a following formula (1) and metal oxides represented by a following formula (2). Y3-x1-y1R1y1Cex1Al5-z1Gaz1O12 (1) Y3-x2-y2R2y2Cex2Al5-z2Scz2O12 (2) In the formula (1), R1 includes at least one selected from the group consisting of Gd and Tb, and x1, y1, and z1 satisfy 0.003≤x1≤0.03, 0≤y1≤2.1, and 0≤z1≤2.2, respectively. In the formula (2), R2 includes at least one selected from the group consisting of Gd and Tb, and x2, y2, and z2 satisfy 0.003≤x2≤0.03, 0≤y2≤2.1 and 0≤z2≤1.5, respectively.
Abstract:
A red phosphor material comprising an essential component represented by a formula of ALn1-x-yEuxSmyM2O8 as a main component, where A represents at least one selected from Li, Na, and K; Ln represents at least one selected from La and Gd; M represents at least one selected from W and Mo; and x and y are numerical values that satisfy 0.1≦x+y≦0.7 and 0.005≦y≦0.08. A light-emitting device includes an excitation light source and the red phosphor material that absorbs excitation light emitted by the excitation light source and emits red light.
Abstract:
An oxychloride phosphor of the present disclosure includes divalent Eu arranged as an augmenting agent, at part of locations. The locations correspond to site of at least two kinds of predetermined substances included in a host crystal. A rate of the number of the divalent Eu with respect to the sum of the number of moles of the predetermined substance and the number of moles of the divalent Eu is less than 2%. When the predetermined substance is represented by A, the oxychloride phosphor is represented by a general formula of xAO.yEuO.SiO2.zCl. In this formula, A represents Sr and Ca, or Sr, Ca, and Mg, y indicates a value of not less than 0.002 and not more than 0.02, x+y indicates a value of more than 1.00 and not more than 1.30, and z indicates a value of not less than 0.20 and not more than 0.70.
Abstract:
A red phosphor material includes an essential component represented by a formula of A2-2xRxEuySmzLnx-y-zM2O8 as a main component, where A represents at least one selected from Ca and Sr; R represents at least one selected from Li, Na, and K; Ln represents at least one selected from La, Gd, and Y; M represents at least one selected from W and Mo; and x, y, and z are numerical values that satisfy 0.2≦x≦0.7, 0.2≦y+z≦0.6, 0.005≦z≦0.04, and x−y−z≧0. A light-emitting device includes an excitation light source and the red phosphor material that absorbs excitation light emitted by the excitation light source and emits red light.