Grirem Advanced Materials Co., Ltd.

General Research Institute for Nonferrous Metals

General Research Institute for Nonferrous Metals, Beijing

Weidong Zhuang

Yunsheng Hu

Ronghui Liu

Yuanhong Liu

Xiaowei Huang

Wei Gao

Huaqiang He

Hongwei Li

Xia Tian Zhang

Tao He

Zhen Long

Huibing Xu

Shusheng Zhang

Fu Du

Chunpei Yan

Xiaowei Zhang

Nan Li

Ying Fang

Huagiang He

Phosphor, a preparation method for the phosphor, and a light emitting device having the phosphor. The phosphor comprises an inorganic compound which at least comprises an element M, an element A, an element D, and an element R; the element M is one or two elements selected from the group consisting of Lu, La, Pr, Nd, Sm, Y, Tb, and Gd and must comprise Lu; the element A is Si and/or Ge; the element D is one or two elements selected from the group consisting of O, N, and F and must comprise N; the element R is Ce and/or Dy. Since the ionic radius of Lu3+ is smaller than that of La3+, when the inorganic compound comprises element Lu, the original ligand site would be contracted. In order to reduce lattice distortion due to the ligand site contraction, the adjacent ligand site expands, and the photochromic property is adjusted.

Phosphor, preparation method for phosphor, and light emitting device having phosphor

A lutetium nitride-based phosphor and a light emitting device comprising the same, wherein the lutetium nitride-based phosphor comprises an inorganic compound, and the composition of the inorganic compound comprises at least an M element, an A element, a D element and an R element; the M element is one or two elements selected from a group consisting of Lu, La, Pr, Nd, Sm, Y, Tb and Gd, and necessarily comprises Lu; the A element is Si and/or Ge; the D element is one or two elements selected from a group consisting of O, N and F, and necessarily comprises N; the R element is Ce and/or Dy, and the atomic molar ratio of the Lu element in the M element is greater than 50%. Because the ion radius of Lu3+ is smaller than the ion radius of La3+, the light color performance thereof can be flexibly adjusted according to needs.

Lutetium nitride-based phosphor and light emitting device comprising same

An oxynitride orange-red fluorescent substance and a light-emitting film or sheet and a light-emitting device comprising the same are disclosed. The chemical formula of the oxynitride orange-red fluorescent substance is MASiNO:dR in which the element M is one or more of the elements selected from Ca, Sr and Ba, the element A is Al or a mixture of Al with one or more of the elements selected from Ga, La, Sc and Y, the element R is one or more of the elements selected from Ce, Eu and Mn, 0.8&#x2266;m&#x2266;1.2, 1&#x3c;a&#x3c;1.7, 1&#x3c;x&#x3c;1.7, 3&#x3c;y&#x3c;4.2, 0&#x3c;z&#x3c;0.7, and 0.001&#x2266;d&#x2266;0.2.

Oxynitride orange-red fluorescent substance and light-emitting film or sheet and light-emitting device comprising the same

A silicon-containing phosphor for LED and its preparation method, and the devices incorporating the same. The phosphor in the present invention can be represented as AO.aSiO.bAX:mEu,nR, wherein A is at least one metal element selected from a group consisting of Sr, Ba, Ca, Mg, and Zn; X is at least one halogen element selected from a group consisting of F, Cl, Br, and I; R is at least one element selected from a group consisting of Bi, Y, La, Ce, Pr, Gd, Tb, and Dy; 0.1&#x3c;a&#x3c;2, 0.005&#x3c;b&#x3c;0.08, 0.005&#x3c;m&#x3c;0.5, 0.005&#x3c;n&#x3c;0.5, and m+n&#x3c;1. The phosphor has excellent luminescent performance and good stability, wide excitation band, and adjustable emission wavelength. White or color LED can be obtained by combining the phosphor of the present invention with UV, purple or blue light LED chip.

Silicon-containing phosphor for LED, its preparation and the light emitting devices using the same

Disclosed are a red light-emitting nitride material, a light-emitting part and a light-emitting device comprising the same. The General Formula of the light-emitting material is: M(Al,B)SiNO:Eu, R, wherein M is at least one of the alkaline earth metal elements Mg, Ca, Sr, Ba and Zn; R is at least one of the rare earth elements Y, La, Ce, Gd and Lu; and 0.9&#x2266;a&#x3c;1.1, 0.9&#x2266;b&#x2266;1, 1&#x2266;c&#x2266;1.5, 2.5&#x3c;d&#x3c;5, 0&#x3c;e&#x3c;0.1, 0&#x3c;m&#x3c;0.05, 0&#x3c;n&#x3c;0.1 and 1&#x3c;c/b&#x3c;1.5. The light-emitting material can be effectively excited by a radiation light having a wavelength below 500 nm, and then emits a visible red light having a wide spectrum from 500 nm to 780 nm. The light-emitting material of the present disclosure has the characteristics of high light-emitting efficiency, good temperature properties and a wide half-width etc., and the material can be used alone or in combination with other light-emitting materials for making high performance light-emitting devices.

Red light-emitting nitride material, and light-emitting part and light-emitting device comprising the same

A phosphor can be excited by UV, purple or blue light LED, its preparation method, and light emitting devices incorporating the same. The phosphor contains rare earth, silicon, alkaline-earth metal, halogen, and oxygen, as well as aluminum or gallium. Its General formula of is aLnO.MO.bM'O.fSiO.cAX:dR, wherein Ln is at least one metal element selected from a group consisting of Sc, Y, La, Pr, Nd, Gd, Ho, Yb and Sm; M is at least one metal element selected from a group consisting of Ca, Sr and Ba; M&#x2032; is at least one metal element selected from Al and Ga; A is at least one metal element selected from a group consisting of Li, Na, K, Mg, Ca, Sr and Ba; X is at least one element selected from F and Cl; R is at least one metal element selected from a group consisting of Ce, Eu, Tb and Mn; 0.01&#x2266;a&#x2266;2, 0.35&#x2266;b&#x2266;4, 0.01&#x2266;c&#x2266;1, 0.01&#x2266;d&#x2266;0.3, 0.01&#x2266;f&#x2266;3, 0.6&#x2266;e&#x2266;2.4. The phosphor has broad emitting range, high efficiency, better uniformity and stability. A light emitting device is obtained by incorporating the phosphor into a UV, purple or blue light emitting device.

Phosphor, its preparation method and light emitting devices using the same

A phosphor can be excited by UV, purple or blue light LED, its production and the light emitting devices. The general formula of the phosphor is LnM(O,F):(R,M'), wherein, Ln is at least one metal element selected from a group consisting of Sc, Y, La, Pr, Nd, Gd, Ho, Yb and Sm, 2.6&#x2266;a&#x2266;3.4; M is at least one element selected from a group consisting of B, Al and Ga, 4.5&#x2266;b&#x2266;5.5; R is at least one metal element selected from a group consisting of Ce and Tb; M&#x2032; is at least one metal element selected from a group consisting of Ca, Sr, Ba, Mn and Zn, 0.001&#x2266;x&#x2266;0.4. The phosphor possesses broad emitting range, high efficiency, better uniformity and stability. A light emitting device can be obtained by incorporating this phosphor into a UV, purple or blue light emitting device.

Aluminate phosphor containing bivalence metal elements, its preparation and the light emitting devices incorporating the same

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Beijing, China

Weidong Zhuang