Proposed is a phosphor capable of effectively inhibiting the occurrence of adverse influence of a sulfur-based gas while improving water resistance of the phosphor and effectively inhibiting the corrosion of a metallic member. A phosphor is proposed, which includes particles or a layer provided on the surface of a sulfur-containing phosphor, which contains sulfur in a host material, and containing a crystalline metal borate containing an IIA-Group element, boron, and oxygen.

CaF.sub.2 translucent ceramics includes at least two rare earth elements selected from a group consisting of La, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu.

The invention provides a light generating system (1000) comprising (i) a plurality of light sources (110,120, . . .), (ii) a first luminescent material (210), and (iii) a second luminescent material (220), wherein: (a) a first light source (110) is configured to generate first light source light (111) having one or more wavelengths in the blue wavelength range and having a first centroid wavelength (C1), wherein the first light source (110) is a laser; (b) the first luminescent material (210) is configured to convert at least part of the first light source light (111) into first luminescent material light (211) having one or more wavelengths in the green and/or yellow wavelength range; (c) a second light source (120) is configured to generate second light source light (121) having one or more wavelengths in the yellow and/or orange wavelength range and having a second centroid wavelength (C2), wherein C2>C1; wherein the second light source (120) is a superluminescent diode; (d) the second luminescent material (220) is configured to convert at least part of the second light source light (121) into second luminescent material light (221) having one or more wavelengths in the orange and/or red wavelength range; and (e) in an operational mode the light generating system (1000) is configured to generate system light (1001) comprising the first luminescent material light (211) and the second luminescent material light (221).

A phosphor sheet-forming resin composition uses a low-cost resin material having high light fastness and low visible light absorption and is capable of providing a phosphor sheet at low cost with deterioration of a phosphor due to moisture being suppressed. The phosphor sheet-forming resin composition contains a film-forming resin composition and a powdery phosphor that emits fluorescence when irradiated with excitation light. The film-forming resin composition contains a hydrogenated styrene-based copolymer, and uses a sulfide-based phosphor as the phosphor. Examples of the hydrogenated styrene-based copolymer include hydrogenated products of styrene-ethylene-butylene-styrene block copolymers. CaS:Eu is used as a preferred sulfide-based phosphor.

An optoelectronic component includes a semiconductor chip that emits a primary radiation in the short-wave blue spectral range at a dominant wavelength of less than approximately 465 nm; and a phosphor that converts at least part of the primary radiation into a longer-wave secondary radiation in the green spectral range at a dominant wavelength of between approximately 490 nm and approximately 550 nm and at least partly surrounds the semiconductor chip, wherein a mixed light composed of primary radiation and secondary radiation has a dominant wavelength at wavelengths of approximately 460 nm to approximately 480 nm such that a luminous flux of the mixed light is up to 130% greater than a luminous flux in an optoelectronic component without a phosphor having the same dominant wavelength in a range of 460 nm to 480 nm, and the phosphor is arranged in a lamina that bears directly on the semiconductor chip.

The invention provides a lighting unit comprising a source of blue light, a source of green light, a first source of red light comprising a first red luminescent material, configured to provide red light with a broad band spectral light distribution, and a second source of red light comprising a second red luminescent material, configured to provide red light with a spectral light distribution comprising one or more red emission lines. Especially, the first red luminescent material comprises (Mg,Ca,Sr)AlSiN.sub.3:Eu and/or (Ba,Sr,Ca).sub.2Si.sub.5-xAl.sub.xO.sub.xN.sub.8-x:Eu, and the second red luminescent material comprises K.sub.2SiF.sub.6:Mn.

The invention provides a light generating system (1000) comprising (i) a plurality of light sources (110, 120, . . . ), (ii) a first luminescent material (210), and (iii) a second luminescent material (220), wherein: (a) a first light source (110) is configured to generate first light source light (111) having one or more wavelengths in the blue wavelength range and having a first centroid wavelength (C1), wherein the first light source (110) is a laser; (b) the first luminescent material (210) is configured to convert at least part of the first light source light (111) into first luminescent material light (211) having one or more wavelengths in the green and/or yellow wavelength range; (c) a second light source (120) is configured to generate second light source light (121) having one or more wavelengths in the yellow and/or orange wavelength range and having a second centroid wavelength (C2), wherein C2>C1; wherein the second light source (120) is a superluminescent diode; (d) the second luminescent material (220) is configured to convert at least part of the second light source light (121) into second luminescent material light (221) having one or more wavelengths in the orange and/or red wavelength range; and (e) in an operational mode the light generating system (1000) is configured to generate system light (1001) comprising the first luminescent material light (211) and the second luminescent material light (221).

A coated phosphor includes a sulfide phosphor coated with silicon dioxide film. The silicon dioxide film includes a metal oxide powder. The metal oxide powder includes a zinc oxide powder such that less than 20 parts by mass of the zinc oxide powder relative to 100 parts by mass of the sulfide phosphor is blended therein.

Provided is a phosphor coated with aluminum oxide, wherein when peak separation is performed on a .sup.1H-NMR spectrum of the phosphor in a range where a .sup.1H chemical shift value is from 0.5 to 11 ppm, peaks 1, 2 and 3 are obtained. Peak 1 has a top at a .sup.1H chemical shift value of 4.0 to 5.5 ppm, peak 2 has a top at a .sup.1H chemical shift value of 2.0 to 2.8 ppm, and peak 3 has a top at a .sup.1H chemical shift value of 0.5 to 1.5 ppm. A ratio S.sub.2/(S.sub.1+S.sub.2+S.sub.3) is 0.39 or less, wherein S.sub.1 represents an integral value of peak 1 in a range where a .sup.1H chemical shift value is from 2 to 12 ppm, S.sub.2 represents an integral value of peak 2 in the same range, and S.sub.3 represents an integral value of peak 3 in the same range.

Provided are a phosphor powder having a sufficiently high absorption rate and high internal quantum efficiency, a phosphor-containing composition, a light-emitting element, and a light-emitting device. The phosphor powder is such that the total volume frequency of particles having a grain size of less than 2.5 m as measured by a laser diffraction scattering grain size distribution measurement method is 10% or greater, the total volume frequency of particles having a grain size of 2.5-10 m is 10-90%, and the cumulative 50% diameter (D50) in the volume grain size distribution is 10.0 m or less.