摘要:
Orange-red phosphors activated by europium and rare earth ions of formula I and formula II are long persistent, stable, and non-toxic M1F2-M1S: Eu2+, Ln3+ (I) M23M32O5X2: inside or outside Eu2+, Ln3+ (II) wherein M1 is Ba, Sr, Ca, Zn, Mg, or a combination thereof; M2 is Ba, Sr, Ca, Mg, Zn, or a combination thereof; M3 is Al, Ga, B, In, or a combination thereof; X is F, Cl, Br, I, or a combination thereof; and Ln is Dy, Yb, Tm, Er, Ho, Sm, Nd, or a combination thereof.
摘要:
A phosphor converted light emitting device includes a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region, the light emitting layer being configured to emit light having a first peak wavelength; a first phosphor configured to emit light having a second peak wavelength; and a second phosphor configured to emit light having a third peak wavelength. The second phosphor is an Eu3+-activated phosphor, configured such that in the excitation spectrum at 298K and 1.013 bar, a maximum intensity in a wavelength range between 460 nm and 470 nm is at least 5% of a maximum intensity in a wavelength range between 220 nm to 320 nm.
摘要:
A phosphor converted light emitting device includes a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region, the light emitting layer being configured to emit light having a first peak wavelength; a first phosphor configured to emit light having a second peak wavelength; and a second phosphor configured to emit light having a third peak wavelength. The second phosphor is an Eu3+-activated phosphor, configured such that in the excitation spectrum at 298K and 1.013 bar, a maximum intensity in a wavelength range between 460 nm and 470 nm is at least 5% of a maximum intensity in a wavelength range between 220 nm to 320 nm.
摘要:
A plasma picture screen fitted with a phosphor layer comprising a red phosphor activated by Eu3+ shows an improved red color point (x≧0.64 and y≦0.35) and shorter decay times &tgr;1/10 as compared with the standard phosphor (Y,Gd)BO3. The phosphor according to the invention has a lattice in which the activator Eu3+ occupies a location which has no inversion symmetry.
摘要:
A plasma picture screen fitted with a phosphor layer comprising a red phosphor activated by Eu3nullshows an improved red color point (xnull0.64 and ynull0.35) and shorter decay times null1/10 as compared with the standard phosphor (Y,Gd)BO3. The phosphor according to the invention has a lattice in which the activator Eu3nulloccupies a location which has no inversion symmetry.
摘要:
To achieve a light-emitting device emitting light with high brightness, closer to natural light, and less color shift due to a small change in intensity of emitted light, in a light-emitting device including a light source emitting light by driving current and at least one wavelength-converting material absorbing at least part of the light from the light source and emitting light having a different wavelength, the color coordinate x1(17.5) and the color coordinate y1(17.5) of the light emitted at a driving current density of 17.5 A/cm2 and the color coordinate x1(70) and the color coordinate y1(70) of the light emitted at a driving current density of 70 A/cm2 satisfy the following Expressions (D) and (E): −0.006≦x1(17.5)−x1(70)≦0.006 (D), −0.006≦y1(17.5)−y1(70)≦0.006 (E).
摘要:
Orange-red phosphors activated by europium and rare earth ions of formula I and formula II are long persistent, stable, and non-toxic M1F2-M1S:Eu2+, Ln3+ (I) M23M32O5X2: inside or outside Eu2+, Ln3+ (II) wherein M1 is Ba, Sr, Ca, Zn, Mg, or a combination thereof; M2 is Ba, Sr, Ca, Mg, Zn, or a combination thereof; M3 is Al, Ga, B, In, or a combination thereof; X is F, Cl, Br, I, or a combination thereof; and Ln is Dy, Yb, Tm, Er, Ho, Sm, Nd, or a combination thereof.
摘要:
By adding the afterglow function to the incandescent lamp, it is made easier, in the place where the incandescent lamp is used, to recognize objects nearby in the darkness after the lamp is turned off or when the electrical power is cut off. An incandescent lamp wherein an inner surface of a glass globe is coated with a phosphorescent phosphor is provided. For the phosphorescent phosphor, there can be used a phosphorescent phosphor comprising, as a host crystal, a compound of the general formula either MAl2O4 or MAl14O25 wherein M is one or more of metal elements selected from the group consisting of calcium, strontium and barium, and utilizing europium (Eu) as an activator, together with dysprosium (Dy) or neodymium (Nd) as a coactivator; as well as a phosphorescent phosphor comprising Y2O2S as a host crystal, and utilizing europium (Eu), magnesium (Mg) or titanium (Ti) as an activator.
摘要翻译:通过将余辉功能添加到白炽灯中,在使用白炽灯的地方更容易在灯关闭之后或当电力切断时识别黑暗中附近的物体。 提供了一种白炽灯,其中玻璃球的内表面涂覆有磷光荧光体。 对于磷光荧光体,可以使用磷光荧光体,其包含作为主体晶体的通式为MA1 / 2O4或MA114的化合物 其中M是选自钙,锶和钡的一种或多种金属元素,并且以铕(Eu)作为活化剂,连同镝(Dy) 或钕(Nd)作为共激活剂; 以及作为主体晶体的包含Y 2 O 2 S 2 S的磷光体荧光体,并且使用铕(Eu),镁(Mg)或钛(Ti)作为活化剂 。
摘要:
To achieve a light-emitting device emitting light with high brightness, closer to natural light, and less color shift due to a small change in intensity of emitted light, in a light-emitting device including a light source emitting light by driving current and at least one wavelength-converting material absorbing at least part of the light from the light source and emitting light having a different wavelength, the color coordinate x1(17.5) and the color coordinate y1(17.5) of the light emitted at a driving current density of 17.5 A/cm2 and the color coordinate x1(70) and the color coordinate y1(70) of the light emitted at a driving current density of 70 A/cm2 satisfy the following Expressions (D) and (E): −0.006≦x1(17.5)−x1(70)≦0.006 (D), −0.006≦y1(17.5)−y1(70)≦0.006 (E).
摘要:
Long persistence phosphors based on strontium sulfide and activated with a divalent rare earth such as europium and a trivalent rare earth that does not change valence in a strontium sulfide host, and including oxygen and a halide, have long persistence and emit in the red-to-orange colors of the spectrum.