A radiation-emitting optoelectronic component may include a semiconductor chip or a semiconductor laser which, in operation of the component, emits a primary radiation in the UV region or in the blue region of the electromagnetic spectrum. The optoelectronic component may further include a conversion element comprising a first phosphor configured to convert the primary radiation at least partly to a first secondary radiation having a peak wavelength in the green region of the electromagnetic spectrum between 475 nm and 500 nm inclusive. The first phosphor may be or include BaSi.sub.4Al.sub.3N.sub.9, SrSiAl.sub.2O.sub.3N.sub.2, BaSi.sub.2N.sub.2O.sub.2, ALi.sub.3XO.sub.4, M*.sub.(1-x*.sub.-y*.sub.-z*)Z*.sub.z*[A*.sub.a*B*.sub.b*C*.sub.c*D*.sub.d*E*.sub.e*N.sub.4-n*O.sub.n*], and combinations thereof.

According to one embodiment, a white light source includes a combination of a light emitting diode and phosphors. One of the phosphors is at least a cerium activated yttrium aluminum garnet-based phosphor. There is no light emission spectrum peak at which a ratio of a largest maximum value to a minimum value is greater than 1.9. The largest maximum value is largest among at least one maximum value present in a wavelength range of 400 nm to 500 nm in a light emission spectrum of white light emitted from the white light source. The minimum value is adjacent to the largest maximum value in a longer wavelength side of the light emission spectrum.

Embodiments of the invention include a luminescent ceramic including (Ba.sub.1-xSr.sub.x).sub.2-zSi.sub.5-yO.sub.4yN.sub.8-4y:Eu.sub.z 258 phase wavelength converting material (0.5≤x≤0.9; 0≤y≤1; 0.001≤z≤0.02) and M.sub.3Si.sub.3O.sub.3N.sub.4 3334 phase material (M=Ba, Sr, Eu). The M.sub.3Si.sub.3O.sub.3N.sub.4 3334 phase material comprises no more than 5 weight % of the material.

An object is to provide a new type of near-infrared ray-emitting phosphor which exhibits excellent emission intensity. A near-infrared ray-emitting phosphor is represented by a general formula, (Y,Lu,Gd).sub.3-x-y (Ga,Al,Sc).sub.5O.sub.12:(Cr.sub.x,(Yb,Nd).sub.y) (0.05<x<0.3, 0≤y<0.3).

A light emitting device includes a light emitting element having a peak emission wavelength of 410 nm to 440 nm and a phosphor member. The phosphor member includes a first phosphor having a peak emission wavelength of 430 nm to 500 nm and containing an alkaline-earth phosphate, a second phosphor having a peak emission wavelength of 440 nm to 550 nm and containing at least one of an alkaline-earth aluminate and a silicate containing Ca, Mg, and Cl, a third phosphor having a peak emission wavelength of 500 nm to 600 nm and containing a rare-earth aluminate, a fourth phosphor having a peak emission wavelength of 610 nm to 650 nm and containing a silicon nitride containing Al and at least one of Sr and Ca, and a fifth phosphor having a peak emission wavelength of 650 nm to 670 nm and containing a fluorogermanate.

A light source for myopia prevention article includes a light emitter to emit light having an emission spectrum continuing from a first wavelength of not less than 360 nm nor more than 400 nm to a second wavelength of more than 400 nm.

To provide a semiconductor light emitting device which is capable of accomplishing a broad color reproducibility for an entire image without losing brightness of the entire image. A light source provided on a backlight for a color image display device has a semiconductor light emitting device comprising a solid light emitting device to emit light in a blue or deep blue region or in an ultraviolet region and phosphors, in combination. The phosphors comprise a green emitting phosphor and a red emitting phosphor. The green emitting phosphor and the red emitting phosphor are ones, of which the rate of change of the emission peak intensity at 100 C. to the emission intensity at 25 C., when the wavelength of the excitation light is 400 nm or 455 nm, is at most 40%.

The present invention relates to a metal fluoride red phosphor and an application of the phosphor as a light emitting element, the metal fluoride red phosphor having a tetragonal crystal structure of a novel composition, and emitting light in the red color wavelength by being excited by ultraviolet rays or a blue excitation source, thereby being usefully applicable to a light emitting element such as a light emitting diode, a laser diode, a surface emitting laser diode, an inorganic electroluminescence element, and an organic electroluminescence element.

According to one embodiment, a white light source includes a combination of a light emitting diode and phosphors. One of the phosphors is at least a cerium activated yttrium aluminum garnet-based phosphor. There is no light emission spectrum peak at which a ratio of a largest maximum value to a minimum value is greater than 1.9. The largest maximum value is largest among at least one maximum value present in a wavelength range of 400 nm to 500 nm in a light emission spectrum of white light emitted from the white light source. The minimum value is adjacent to the largest maximum value in a longer wavelength side of the light emission spectrum.

Disclosed are methods of detecting one or more analytes in a sample by: (1) associating the sample with a surface that includes an analyte binding agent to result in the immobilization of the analytes on the surface; (2) contacting the analyte with a composition that includes at least one phosphor compound with an affinity for the analyte; (3) formation of immobilized analyte binding agent-analyte-phosphor complexes on the surface; (4) separating unbound phosphor compounds from the immobilized complexes; (5) detecting a presence or absence of a luminescence signal from the immobilized complexes; and (6) correlating the luminescence signal to the presence or absence of the analyte in the sample. The phosphor compound may include (Sr.sub.1-Ba.sub.).sub.2-j-kMgSi.sub.2O.sub.7:Eu.sub.jDy.sub.k, (Sr.sub.1-Ba.sub.).sub.2-xMgSi.sub.2O.sub.7:Eu.sup.2+Dy.sup.3+, (Sr.sub.1-Ba.sub.).sub.2MgSi.sub.2O.sub.7:Eu.sup.2+Dy.sup.3+, (Sr.sub.1-Ba.sub.).sub.2-xMgSi.sub.2O.sub.7:Eu.sup.2+, and combinations thereof. Additional phosphor compounds may also be utilized, such as [AE].sub.2MgSi.sub.2O.sub.7:Eu.sup.2+, [AE]Al.sub.2O.sub.4:Eu.sup.2+, Dy.sup.3+, and combinations thereof, where AE is at least one of Ca, Sr, or Ba.