Intematix Corporation

Intermatix Corporation

Shifan Cheng

Yi-Qun Li

Yi Dong

Ning Wang

Dejie Tao

Yusong Wu

Jingtao Gu

Zhankun Jia

Gang Wang

Xianglong Yuan

Xiao-dong Xiang

Xiao-Dong Sun

Shengfeng Liu

Xiao-Dong Xiang

Qizhen Xue

Magnus Ryde

Mike Ko

Ravilisetty Padmanabha Rao

Dejie T Tao

Disclosed herein are green-emitting, garnet-based phosphors having the formula (LuYTbA)(AlB)(OC):Ce,Eu, where A is selected from the group consisting of Mg, Sr, Ca, and Ba; B is selected from the group consisting of Ga and In; C is selected from the group consisting of F, Cl, and Br; and 0&#x2264;a&#x2264;1; 0&#x2264;b&#x2264;1; 0&#x3c;c&#x2264;0.5; 0&#x2264;d&#x2264;1; and 0&#x3c;e&#x2264;0.2. These phosphors are distinguished from anything in the art by nature of their inclusion of both an alkaline earth and a halogen. Their peak emission wavelength may lie between about 500 nm and 540 nm; in one embodiment, the phosphor (Lu,Y,A)Al(O,F,Cl):Euhas an emission at 540 nm. The FWHM of the emission peak lies between 80 nm and 150 nm. The present green garnet phosphors may be combined with a red-emitting, nitride-based phosphor such as CaAlSiNto produce white light.

Green-emitting, garnet-based phosphors in general and backlighting applications

This invention provides methods and systems to prepare replicate arrays from master arrays of liquid solutions. Replicate arrays of liquid solutions can be reacted to form product solid inorganic material arrays for analysis and selection of optimum processes and products with desirable properties.

Printing liquid solution arrays for inorganic combinatorial libraries

Disclosed herein are green-emitting, garnet-based phosphors having the formula (LuYTbA)(AlB)(OC): Ce,Eu, where A is selected from the group consisting of Mg, Sr, Ca, and Ba; B is selected from the group consisting of Ga and In; C is selected from the group consisting of F, Cl, and Br; and 0&#x2266;a&#x2266;1; 0&#x2266;b&#x2266;1; 0&#x3c;c&#x2266;0.5; 0&#x2266;d&#x2266;1; and 0&#x3c;e&#x2266;0.2. These phosphors are distinguished from anything in the art by nature of their inclusion of both an alkaline earth and a halogen. Their peak emission wavelength may lie between about 500 nm and 540 nm; in one embodiment, the phosphor (Lu,Y,A)Al(O,F,Cl): Euhas an emission at 540 nm. The FWHM of the emission peak lies between 80 nm and 150 nm. The present green garnet phosphors may be combined with a red-emitting, nitride-based phosphor such as CaAlSiNto produce white light.

Disclosed herein are yellow-green and yellow-emitting aluminate based phosphors for use in white LEDs, general lighting, and LED and backlighting displays. In one embodiment of the present invention, the cerium-activated, yellow-green to yellow-emitting aluminate phosphor comprises the rare earth lutetium, at least one alkaline earth metal, aluminum, oxygen, at least one halogen, and at least one rare earth element other than lutetium, wherein the phosphor is configured to absorb excitation radiation having a wavelength ranging from about 380 nm to about 480 nm, and to emit light having a peak emission wavelength ranging from about 550 nm to about 600 nm.

Yellow-green to yellow-emitting phosphors based on halogenated-aluminates

Disclosed herein are green-emitting, garnet-based phosphors having the formula (LuYTbA)(AlB)(OC):Ce,Eu, where A is selected from the group consisting of Mg, Sr, Ca, and Ba; B is selected from the group consisting of Ga and In; C is selected from the group consisting of F, Cl, and Br; and 0&#x2266;a&#x2266;1; 0&#x2266;b&#x2266;1; 0&#x3c;c&#x2266;0.5; 0&#x2266;d&#x2266;1; and 0&#x3c;e&#x2266;0.2. These phosphors are distinguished from anything in the art by nature of their inclusion of both an alkaline earth and a halogen. Their peak emission wavelength may lie between about 500 nm and 540 nm; in one embodiment, the phosphor (Lu,Y,A)Al(O,F,Cl):Euhas an emission at 540 nm. The FWHM of the emission peak lies between 80 nm and 150 nm. The present green garnet phosphors may be combined with a red-emitting, nitride-based phosphor such as CaAlSiNto produce white light.

Disclosed herein are cerium doped, garnet phosphors emitting in the yellow region of the spectrum, and having the general formula (Y,A)(Al,B)(O,C):Ce, where A is Tb, Gd, Sm, La, Sr, Ba, Ca, and/or Mg, and substitutes for Y, B is Si, Ge, B, P, and/or Ga, and substitutes for Al, and C is F, Cl, N, and/or S, where C substitutes for O. Relative to a solid-state-reaction method, the instant co-precipitation methods provide a more homogeneous mixing environment to enhance the distribution of the Ceactivator in the YAG matrix. Such a uniform distribution has the benefit of an increased emission intensity. The primary particle size of the as-prepared phosphor is about 200 nm, with a narrow distribution.

Nano-YAG:Ce phosphor compositions and their methods of preparation

Novel phosphor systems are disclosed having the formula ASiO:EuD, where A is at least one of a divalent metal selected from the group consisting of Sr, Ca, Ba, Mg, Zn, and Cd; and D is a dopant selected from the group consisting of F, Cl, Br, I, P, S, N, and B. In one embodiment, the novel phosphor has the formula (SrBaM)SiO:EuF (where M is one of Ca, Mg, Zn, or Cd in an amount ranging from 0&#x3c;y&#x3c;0.5). The phosphor is configured to absorb visible light from a blue LED, and luminescent light from the phosphor plus light from the blue LED may be combined to form white light. The novel phosphors can emit light at intensities greater than either conventionally known YAG compounds, or silicate-based phosphors that do not contain the inventive dopant ion.

Silicate-based yellow-green phosphors

Novel two-phase yellow phosphors are disclosed having a peak emission intensity at wavelengths ranging from about 555 nm to about 580 nm when excited by a radiation source having a wavelength ranging from 220 nm to 530 nm. The present phosphors may be represented by the formula a[Sr(M1)]SiO.(1-a)[Sr(M2)]SiO:EuD, wherein M1 and M2 are at least one of a divalent metal such as Ba, Mg, Ca, and Zn, the values of a, x, y, z and u follow the following relationships: 0.6&#x2266;a&#x2266;0.85; 0.3&#x2266;x&#x2266;0.6; 0.85&#x2266;y&#x2266;1; 1.5&#x2266;z&#x2266;2.5; 2.6&#x2266;u&#x2266;3.3; and Eu and D each range from 0.001 to about 0.5. D is an anion selected from the group consisting of F, Cl, Br, S, and N, and at least some of the D anion replaces oxygen in the host silicate lattice of the phosphor. The present yellow phosphors have applications in high brightness white LED illumination systems, LCD display panels, plasma display panels, and yellow LEDs and illumination systems.

Two-phase silicate-based yellow phosphor

Novel green phosphors are disclosed having the comprise silicate-based compounds having the formula (Sr,A)(Si,A)(O,A):Eu, where Ais at least one divalent cation (a 2+ ion) including Mg, Ca, Ba, or Zn, or a combination of 1+ and 3+ cations; Ais a 3+, 4+, or 5+ cation, including at least one of B, Al, Ga, C, Ge, N, and P; Ais a 1&#x2212;, 2&#x2212;, or 3&#x2212; anion, including F, Cl, Br, and S; and x is any value between 1.5 and 2.5, both inclusive. The formula is written to indicate that the Acation replaces Sr; the Acation replaces Si, and the Aanion replaces O. These green phosphors are configured to emit visible light having a peak emission wavelength greater than about 480 nm. They have applications in green illumination systems, red-green-blue backlighting systems, white LEDs, and plasma display panels (PDPs).

Silicate-based green phosphors in red-green-blue (RGB) backlighting and white illumination systems

Novel phosphor systems for a white LED are disclosed. The phosphor systems are excited by a non-visible to near-UV radiation source having an excitation wavelength ranging from about 250 to 420 nm. The phosphor system may comprise one phosphor, two phosphors, and may include optionally a third and even a fourth phosphor. In one embodiment of the present invention, the phosphor is a two phosphor system having a blue phosphor and a yellow phosphor, wherein the long wavelength end of the blue phosphor is substantially the same wavelength as the short wavelength end of the yellow phosphor. Alternatively, there may be a wavelength gap between the yellow and blue phosphors. The yellow phosphor may be phosphate or silicate-based, and the blue phosphor may be silicate or aluminate-based. Single phosphor systems excited by non-visible radiation are also disclosed. In other embodiments of present invention, a single phosphor is used to produce white light illumination, the single phosphor having a broad emission spectrum with a peak intensity ranging from about 520 to 560 nm.

Phosphor systems for a white light emitting diode (LED)

A semiconductor color image sensor comprises: an array of semiconductor photo-sensors (CMOS or CCD) and a color filter array comprising an array of red, green and blue filter elements in which each filter element is associated with a respective one of the photo-sensors. The sensor further comprises a phosphor (photo-luminescent) material associated with each of the blue filter elements and configured to absorb blue light and re-emit light of a longer wavelength range which is then incident on the photo-sensor associated with the blue filter element. Preferably the phosphor material is selected such that light of the longer wavelength range substantially matches the spectral response of the photo-sensor. The image sensor can further comprise an array of micro-lenses for focusing light onto the photo-sensors of the image sensor, wherein each micro-lens is associated with a respective one of the photo-sensors.

Growing community of inventors

Dublin, CA, United States of America

Shifan Cheng