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Rare Earth Ion Activated Complex Phase Fluorescent Materials

A technology of fluorescent materials and rare earth ions, applied in the field of complex-phase fluorescent materials, can solve the problems of single luminous color, inability to match fluorescent powder, weak luminous intensity, etc.

Active Publication Date: 2017-04-12
HANGZHOU YINGHE PHOTOELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The green fluorescent material described in this patent has a wide excitation spectrum, but the luminous color is single; and the red fluorescent material has a weak luminous intensity, which cannot be matched with existing phosphors, and has great limitations in practical applications.

Method used

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  • Rare Earth Ion Activated Complex Phase Fluorescent Materials
  • Rare Earth Ion Activated Complex Phase Fluorescent Materials
  • Rare Earth Ion Activated Complex Phase Fluorescent Materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] raw material Weight (g) SrCO 3

[0039] The raw materials of the above composition are fully ball-milled and mixed, put into a crucible, put into an electric furnace, and sinter in an oxidizing atmosphere at 900°C for 4 hours, and then put it into a flow of 95% hydrogen, 3% nitrogen and 2 % hydrogen sulfide mixed gas furnace for sintering, and sintering at 1100 ° C for 4 hours. After the sintered body is cooled, crush it, grind it with a ball mill, and then sieve it with a 325-mesh sieve to obtain the composite fluorescent material SrO 0.6MgO SiO with blue light emission in the present invention 2 0.02P 2 o 5 : 0.03Eu 2+ 0.25Cl - / 0.23Ag. The excitation spectrum of the material is within the range of 240-450nm, and the position of the main excitation peak is at 358nm; the emission spectrum is within the range of 420-560nm, and the position of the main emission peak is at 467nm.

Embodiment 2

[0041] raw material Weight (g) SrCO 3

[0042] The raw materials of the above composition are fully ball milled and mixed, put into a crucible, put into an electric furnace, and sinter in an oxidizing atmosphere at 800°C for 6 hours, after cooling, put it into a furnace with hydrogen gas for sintering, and sinter at 1300°C Heat preservation and sintering for 4 hours. After the sintered body is cooled, crush it, grind it with a ball mill, and then sieve it with a 325-mesh sieve to obtain the fluorescent material 0.6SrO 0.2CaO 0.5MgO SiO with blue-green luminescence in the present invention 2 0.02B 2 o 3 0.2P 2 o 5 : 0.01Eu 2 + / 0.17Ag. The excitation spectrum of the material is within the range of 250-470nm, and the position of the main excitation peak is at 362nm; the emission spectrum is within the range of 420-590nm, and the position of the main emission peak is at 485nm.

Embodiment 3

[0044] raw material Weight (g) SrCO 3

[0045] SiO 2

[0046] The raw materials of the above composition are fully ball milled and mixed, put into a crucible, put into an electric furnace, and sinter in an oxidizing atmosphere at 1000°C for 2 hours, after cooling, put it into a furnace with hydrogen gas for sintering, and sinter at 1000°C Heat preservation and sintering for 6 hours. After the sintered body is cooled, crush it, grind it with a ball mill, and then sieve it with a 325-mesh sieve to obtain the multi-phase fluorescent material 0.5SrO 0.5CaO 0.3MgO SiO in the present invention. 2 0.01B 2 o 3 : 0.01Eu 2+ 0.001Mn 2+ / 0.12Ag. The excitation spectrum of the material is within the range of 260-480nm, and the position of the main excitation peak is at 422nm; the emission spectrum is within the range of 430-600nm, and the position of the main emission peak is at 499nm.

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Abstract

The invention provides a fluorescent material for white-light LEDs and a manufacturing method thereof. According to the fluorescent material, excitation light sources within the range of ultraviolet to green ray are excitable and rare earth Eu ions are used as a main activator. The material has illuminant color from blue system to red system. The composition of the fluorescent material is MxA delta ByOzC gamma: eta Eu, zeta D / omega T. The material is characterized in that the material is a multiphase structure composed of a rare earth ion-activated silicate or phosphate or borate fluorescent solid solution phase and one or more elements of inert metal particles such as Au, Ag, Pt and Pd. With the presence of the inert metal particles in the multiphase structure, luminescence property of the fluorescent solid solution phase can be improved obviously. After excited by ultraviolet-blue green light within the emission peak wavelengths of 300-500 nm, luminescent spectrum with one or more peaks within the peak wavelengths of 450-600 nm can be emitted, and luminescence from blue to orange red can be shown. The multiphase fluorescent material is applied in manufacturing of LED devices.

Description

technical field [0001] The invention relates to a composite fluorescent material, in particular to a fluorescent material for white light system and multicolor light emitting devices including semiconductor light emitting elements (LED). Background technique [0002] With the breakthrough of the third-generation semiconductor material gallium nitride and the advent of blue, green, and white light-emitting diodes, LED (semiconductor light-emitting diode, Light-Emitting Diode), known as "the technology that illuminates the future", has gradually entered the market. our daily lives and will lead us to a brighter future. Using the third-generation semiconductor material gallium nitride as the semiconductor lighting source, the power consumption is only 1 / 10 of that of ordinary incandescent lamps at the same brightness, and the life span can reach 100,000 hours. A semiconductor lamp can be used for more than 50 years under normal conditions. As a new lighting technology, LED wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/71C09K11/63C09K11/59C09K11/82C09K11/81C09K11/73C09K11/64H01L33/50
Inventor 邓华支波周炯
Owner HANGZHOU YINGHE PHOTOELECTRONICS MATERIALS
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