摘要:
A novel fluorescent substance for a light-emitting diode, emitting light of any one of three primary colors by excitation of an ultraviolet light-emitting diode. Alternatively, a novel fluorescent substance for a light-emitting diode, emitting light in a red region of a spectrum by excitation of a blue light-emitting diode. Na2SrSi2O6 is doped with Eu3+. Preferably, Eu3+ is added so as to account for 1 to 80 mol % in concentration in a host crystal, while sites of Si4+ in Na2SrSi2O6. are replaced by Al3+ and/or Ga3+. Alternatively, Ca3Si2O7 is doped with Ce3+ and Tb3+. Preferably, Ce3+ and Tb3+ are added so as to account for 0.1 to 80 mol % and 0.1 to 20 mol % in concentration in a host crystal, respectively. Still alternatively, Ca3Si2O7 is doped with Eu2+. Preferably, Eu2+ is added so as to account for 0.5 to 10 mol % in concentration in the host crystal.
摘要翻译:一种用于发光二极管的新型荧光物质,通过激发紫外发光二极管发射三原色中的任一种的光。 或者,用于发光二极管的新型荧光物质,通过蓝色发光二极管的激发在光谱的红色区域中发光。 Na2SrSi2O6掺杂Eu3 +。 优选添加Eu 3+,以使主体晶体中的浓度为1〜80摩尔%,而Na 2 S 6 Si 2 O 6中的Si 4+的位置。 被Al3 +和/或Ga3 +代替。 或者,Ca 3 Si 2 O 7掺杂有Ce 3+和Tb 3+。 优选分别加入Ce3 +和Tb3 +,使其在主晶体中的浓度分别为0.1〜80mol%和0.1〜20mol%。 或者,Ca 3 Si 2 O 7掺杂有Eu 2+。 优选加入Eu 2+以使其在主晶体中的浓度为0.5〜10摩尔%。
摘要:
A novel fluorescent substance for a light-emitting diode, emitting light of any one of three primary colors by excitation of an ultraviolet light-emitting diode. Alternatively, a novel fluorescent substance for a light-emitting diode, emitting light in a red region of a spectrum by excitation of a blue light-emitting diode. Na2SrSi2O6 is doped with Eu3+. Preferably, Eu3+ is added so as to account for 1 to 80 mol % in concentration in a host crystal, while sites of Si4+ in Na2SrSi2O6. are replaced by Al3+ and/or Ga3+. Alternatively, Ca3Si2O7 is doped with Ce3+ and Tb3+. Preferably, Ce3+ and Tb3+ are added so as to account for 0.1 to 80 mol % and 0.1 to 20 mol % in concentration in a host crystal, respectively. Still alternatively, Ca3Si2O7 is doped with Eu2+. Preferably, Eu2+ is added so as to account for 0.5 to 10 mol % in concentration in the host crystal.
摘要翻译:一种用于发光二极管的新型荧光物质,通过激发紫外发光二极管发射三原色中的任一种的光。 或者,用于发光二极管的新型荧光物质,通过蓝色发光二极管的激发在光谱的红色区域中发光。 Na2SrSi2O6掺杂Eu3 +。 优选添加Eu 3+,以使主体晶体中的浓度为1〜80摩尔%,而Na 2 S 6 Si 2 O 6中的Si 4+的位置。 被Al3 +和/或Ga3 +代替。 或者,Ca 3 Si 2 O 7掺杂有Ce 3+和Tb 3+。 优选分别加入Ce3 +和Tb3 +,使其在主晶体中的浓度分别为0.1〜80mol%和0.1〜20mol%。 或者,Ca 3 Si 2 O 7掺杂有Eu 2+。 优选加入Eu 2+以使其在主晶体中的浓度为0.5〜10摩尔%。
摘要:
A method for producing a silicate-based oxynitride phosphor, comprising a step of firing a raw material mixture while contacting the raw material mixture with a Si-containing gas containing gas phase Si to generate a silicate-based oxynitride phosphor.
摘要:
A crystalline material represented by M12a(M2bLc)M3dOyNx wherein M1 is at least one element selected from alkali metals, M2 is at least one element selected from Ca, Sr, and Ba, M3 is at least one element selected from Si and Ge, L is at least one element selected from rare earth elements, Bi, and Mn, a is 0.9 to 1.5, b is 0.8 to 1.2, c is 0.005 to 0.2, d is 0.8 to 1.2, x is 0.001 to 1.0, and y is 3.0 to 4.0 or less.
摘要:
A method for producing a crystalline material comprising a step of firing a raw material mixture containing M1, M2, M3, and L in an atmosphere containing NH3 gas to generate a crystalline material represented by M12a(M2bLc)M3dOyNx
摘要:
Provided is a fluorescent body for use in a near-ultraviolet excitation light-emitting element, comprising the compound given by formula (1), having part of element M1 and/or M2 therein replaced by an activation element (M3). M1aM2bPcO15(1) (Here, M1 represents one or more elements chosen from the group comprising Ca, Sr, and Ba; M2 represents one or more elements chosen from the group comprising Mg and Zn; a is a number between 1.5 and 2.5, inclusive; b is a number between 2.5 and 3.5, inclusive; and c is a number between 3.5 and 4.5, inclusive.) A fluorescent body in which M1 is Sr and M2 is Mg, and a fluorescent body in which M3 is Eu are preferable. Also provided are a fluorescent paste having the fluorescent body, and a near-ultraviolet excitation light-emitting element having the fluorescent body and having a high luminescent intensity.
摘要:
Provided are phosphors that can exhibit higher emission luminance. Phosphors in which the activator is included in a compound represented by Formula xM1O.M2O.yM3O2 (wherein M1 represents one or more of a group comprising Ca, Sr and Ba, M2 represents Mg and/or Zn, M3 represents Si and/or Ge, x is a value in the range 4 to 6 and y is a value in the range 2 to 4). Phosphors represented by Formula M15(1−z)EuzM2M33O12 (wherein M1, M2 and M3 have the same meanings as above, and z is a value in the range 0.0001 to 0.3). The above phosphors have the same crystal structure as bredigite.
摘要:
Provided are phosphors that can provide emission devices that can further improve emission characteristics, principally, color rendering. Disclosed are phosphors made by substituting at least a portion of M2 in compounds represented by Formula (1) with M4 (M4 represents a trivalent cationic element), substituting a portion of O in said compound with M5 (M5 represents a trivalent anionic element) and substituting a portion of M1 and/or M2 in said compound with an activated element. In Formula (1): aM1O.3M2O.6M3O2 (In Formula (1), M1 represents one or more alkaline-earth elements selected from a group comprising Ba, Sr and Ca, M2 represents one or more divalent metal elements selected from a group comprising Mg and Zn, M3 represents a tetravalent metal element and a is a value in the range 3 to 9.)
摘要:
There are provide a silicate-based phosphor excellent in emission intensity and a manufacturing method of the same. A manufacturing method of a silicate-based phosphor is characterized by: introducing in a vessel raw material powders having a compound containing light-emitting ions selected from at least one of Eu, Ce, Mn, and Tb; and firing the raw material powders while supplying SiOx (0.5≦x≦1.9, preferably, 0.8≦x≦1.2) in a gas phase. The raw material powders preferably further contains at least one of an alkali metal compound, an alkaline-earth metal compound, a magnesium compound, and a rare-earth compound. The silicate-based phosphor is preferably M2SiO4:Eu2+ (wherein M is one or more selected from a group consisting of Ca, Sr and Ba). The firing is preferably performed by supplying the SiOx to the raw material powders in a gas atmosphere at a temperature of 1200 to 1700° C. and subjecting the raw material powders to a gas-solid phase reaction at a temperature of 700 to 1700° C.
摘要:
A novel method for measuring airborne radon and thoron capable of separately measuring radon and thoron with high sensitivity, having a small-sized device structure, and free of the influence from its measurement environment. In the method, by measuring Cherenkov light generated when airborne radon and thoron are adsorbed to an absorbent and then β rays emitted in process of disintegrations of radon and thoron pass through the absorbent, radon and thoron are measured. Based on a decay time of the Cherenkov light, a mixture ratio between radon and thoron is measured. As the absorbent, porous glass is preferably employed which is provided with fine pores of 0.3 to 30 nm in diameter.