A red nitride phosphor is provided. The red nitride phosphor is represented by the following general formula (I):

SrLi(Ga.sub.xAl.sub.1-x).sub.3N.sub.4:Eu.sup.2+general formula (I),

in general formula (I), 0<x1.

An optoelectronic component is disclosed. In an embodiment, an optoelectronic component includes a semiconductor chip configured to emit primary radiation having a peak wavelength between 420 nm inclusive and 480 nm inclusive and a conversion element including a first converter material configured to partially convert the primary radiation into secondary radiation in a green range of the electromagnetic spectrum and a second converter material configured to partially convert the primary radiation into a secondary radiation in a red region of the electromagnetic spectrum, wherein the second converter material including a first red phosphor of the formula (K,Na).sub.2(Si,Ti)F.sub.6:Mn.sup.4+ and a second red phosphor of the formula (M).sub.2-xEu.sub.xSi.sub.2Al.sub.2N.sub.6 where M=Sr, Ca, Ba, and/or Mg and 0.001?x?0.2, and wherein the optoelectronic device is configured to emit white total radiation.

A method of producing a nitride fluorescent material having a high light emission intensity and including a calcined product having a composition represented by formula M.sup.a.sub.vM.sup.b.sub.wM.sup.c.sub.xM.sup.d.sub.yN.sub.z is provided. M.sup.a is at least one element selected from Sr, Ca, Ba, and Mg; M.sup.b is at least one element selected from Li, Na, and K; M.sup.c is at least one element selected from Eu, Mn, Tb, and Ce; M.sup.d is at least one element selected from Al, B, Ga, and In; v, w, x, y, and z satisfy 0.8v1.1, 0.8w1.1, 0.001<x0.1, 2.0y4.0, and 3.0z5.0, respectively. The nitride fluorescent material includes elemental oxygen in a range of 2% or more and 4% or less by mass. The method includes mixing the calcined product with a polar solvent having a relative dielectric constant in a range of 10 or more and 70 or less at 20 C.

A phosphor is specified. The phosphor has the general molecular formula: (MA).sub.a(MB).sub.b(MC).sub.c(MD).sub.d(TA).sub.e(TB).sub.f(TC).sub.g(TD).sub.h(TE).sub.i(TF).sub.j(XA).sub.k(XB).sub.l(XC).sub.m(XD).sub.n:E. In this case, MA is selected from a group of monovalent metals, MB is selected from a group of divalent metals, MC is selected from a group of trivalent metals, MD is selected from a group of tetravalent metals, TA is selected from a group of monovalent metals, TB is selected from a group of divalent metals, TC is selected from a group of trivalent metals, TD is selected from a group of tetravalent metals, TE is selected from a group of pentavalent elements, TF is selected from a group of hexavalent elements, XA is selected from a group of elements which comprises halogens, XB is selected from a group of elements which comprises O, S and combinations thereof,E=Eu, Ce, Yb and/or Mn, XC=N and XD=C. The following furthermore hold true: a+b+c+d=t; e+f+g+h+i+j=u; k+l+m+n=v; a+2b+3c+4d+e+2f+3g+4h+5i+6jk2l3m4n=w; 0.8t1; 3.5u4; 3.5v4; (0.2)w0.2 and 0m<0.875 v and/or vl>0.125 v.

A phosphor is specified. The phosphor has the general molecular formula: (MA).sub.a(MB).sub.b(MC).sub.c(MD).sub.d(TA).sub.e(TB).sub.f(TC).sub.g(TD).sub.h(TE).sub.i(TF).sub.j(XA).sub.k(XB).sub.l(XC).sub.m(XD).sub.n:E. In this case, MA is selected from a group of monovalent metals, MB is selected from a group of divalent metals, MC is selected from a group of trivalent metals, MD is selected from a group of tetravalent metals, TA is selected from a group of monovalent metals, TB is selected from a group of divalent metals, TC is selected from a group of trivalent metals, TD is selected from a group of tetravalent metals, TE is selected from a group of pentavalent elements, TF is selected from a group of hexavalent elements, XA is selected from a group of elements which comprises halogens, XB is selected from a group of elements which comprises O, S and combinations thereof, -E=Eu, Ce, Yb and/or Mn, XCN and XD=C. The following furthermore hold true: a+b+c+d=t; e+f+g+h+i+j=u; k+l+m+n=v; a+2b+3c+4d+e+2f+3g+4h+5i+6jk2l3m4n=w; 0.8t1; 3.5u4; 3.5v4; (0.2)w0.2 and 0m<0.875 v and/or vl>0.125 v.

A lighting device is specified. The lighting device comprises a phosphor having the general molecular formula

(MA).sub.a(MB).sub.b(MC).sub.c(MD).sub.d(TA).sub.e(TB).sub.f(TC).sub.g(TD).sub.h(TE).sub.i(TF).sub.j(XA).sub.k(XB).sub.l(XC).sub.m(XD).sub.n:E.

In this case, MA is selected from a group of monovalent metals, MB is selected from a group of divalent metals, MC is selected from a group of trivalent metals, MD is selected from a group of tetravalent metals, TA is selected from a group of monovalent metals, TB is selected from a group of divalent metals, TC is selected from a group of trivalent metals, TD is selected from a group of tetravalent metals, TE is selected from a group of pentavalent elements, TF is selected from a group of hexavalent elements, XA is selected from a group of elements which comprises halogens, XB is selected from a group of elements which comprises O, S and combinations thereof, XC=N and XD=C and E=Eu, Ce, Yb and/or Mn. The following furthermore hold true: a+b+c+d=t; e+f+g+h+i+j=u; k+l+m+n=v; a+2b+3c+4d+e+2f+3g+4h+5i+6jk2l3m4n=w; 0.8t1; 3.5u4; 3.5v4; (0.2)w0.2 and 0m<0.875 v and/or vl>0.125 v.

A device including an LED light source optically coupled to a green-emitting U.sup.6+-doped phosphor having a composition selected from the group consisting of U.sup.6+-doped phosphate-vanadate phosphors, U.sup.6+-doped halide phosphors, U.sup.6+-doped oxyhalide phosphors, U.sup.6+-doped silicate-germanate phosphors, U.sup.6+-doped alkali earth oxide phosphors, and combinations thereof, is presented. The U.sup.6+-doped phosphate-vanadate phosphors are selected from the group consisting of compositions of formulas (A1)-(A12). The U.sup.6+-doped halide phosphors are selected from the group consisting of compositions for formulas (B1)-(B3). The U.sup.6+-doped oxyhalide phosphors are selected from the group consisting of compositions of formulas (C1)-(C5). The U.sup.6+-doped silicate-germanate phosphors are selected from the group consisting of compositions of formulas (D1)-(D11). The U.sup.6+-doped alkali earth oxide phosphors are selected from the group consisting of formulas (E1)-(E11).

Provided are a phosphor emitting light having a wavelength of 600 nm or more in the red-to-nearinfrared range when irradiated with visible light or ultraviolet light; a method for producing same; a light emitting element using same; and a light emitting device using same. The phosphor includes an inorganic compound including A element, M element, D element, E element (A is at least one element selected from the group of Mg, Ca, Sr and Ba; M is at least one element selected from the group of Mn, Eu, Ce, Nd, Tb, Dy, Ho, Er, Tm and Yb; D is Si and/or Al; and E is O and/or N) and, if necessary, G element (G is Li), and represented by (A, M).sub.aD.sub.dE.sub.eG.sub.g, (atomic fraction parameters a, d, e and g satisfy 2.4?a?4.8, 17.4?d?22.2, 26.2?e?28.6 and 0?g?3).

Disclosed are a production method for a nitride fluorescent material, a nitride fluorescent material and a light emitting device. The production method is for producing a nitride fluorescent material that has, as a fluorescent material core, a calcined body having a composition containing at least one element M.sup.a selected from the group consisting of Sr, Ca, Ba and Mg, at least one element M.sup.b selected from the group consisting of Li, Na and K, at least one element M.sup.c selected from the group consisting of Eu, Ce, Tb and Mn, and Al, and optionally Si, and N, and the method includes preparing a calcined body having the above-mentioned composition, bringing the calcined body into contact with a fluorine-containing substance, and subjecting it to a first heat treatment at a temperature of 100 C. or higher and 500 C. or lower to form a fluoride-containing first film on the calcined body, and forming on the calcined body, a second film that contains a metal oxide containing at least one metal element M2 selected from the group consisting of Si, Al, Ti, Zr, Sn and Zn and subjecting it to a second heat treatment at a temperature in a range of higher than 250 C. and 500 C. or lower.

A method of producing a nitride fluorescent material is provided. The nitride fluorescent material undergoes less change in chromaticity under a high-temperature and high-humidity condition and are excellent in durability. The nitride fluorescent material has a composition containing: at least one element selected from the group consisting of Ca, Sr, Ba, and Mg; at least one element selected from the group consisting of Li, Na, and K; at least one element selected from the group consisting of Eu, Ce, Tb, and Mn; Al; and N. The method includes: preparing a calcined product having the composition, bringing the calcined product in contact with a fluorine-containing substance, and heat-treating the calcined product at a temperature of 200 C. or more and 500 C. or less. A light emitting device using the nitride fluorescent material is also provided.