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Fluorescent material applied in LED lamps

A technology of LED lamps and fluorescent materials, which is applied in the field of fluorescent materials, can solve the problems of low phonon energy, etc., and achieve the effects of increasing luminous intensity, reducing non-radiation and astigmatism, and low astigmatism

Inactive Publication Date: 2018-04-24
刘东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

YV0 4 It has excellent thermal properties, chemical stability and large absorption cross-section in the ultraviolet and vacuum ultraviolet region, and the phonon energy is small, so it is often used as a host material for rare earth luminescence, but there are some problems in the brightness and life of such materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A fluorescent material applied to an LED lamp, the preparation method comprising the following steps:

[0019] (1) Dissolve yttrium oxide in hydrochloric acid with a concentration of 2.9 mol / liter to prepare a yttrium chloride solution with a concentration of 0.30 mol / liter, weigh 0.50 mole of europium nitrate hexahydrate, and dissolve it in 150 ml of deionized water , stir with a magnetic stirrer until the precipitate completely disappears to obtain a clear solution, add 20 ml of sodium hydroxide solution under stirring, heat to 50°C after stirring for 20 minutes, mix the prepared yttrium chloride solution with the heating solution, the mixing ratio Based on the stoichiometric ratio of europium and yttrium being 2:11, stir to obtain a suspension without precipitation;

[0020] (2) Transfer the suspension to a reaction kettle lined with polytetrafluoroethylene, put the reaction kettle into a muffle furnace and heat the reaction at a temperature of 220 ° C, react for 18 ...

Embodiment 2

[0026] A fluorescent material applied to an LED lamp, the preparation method comprising the following steps:

[0027] (1) Dissolve yttrium oxide in hydrochloric acid with a concentration of 2.95 mol / L to prepare a yttrium chloride solution with a concentration of 0.33 mol / L, weigh 0.53 mol of europium nitrate hexahydrate, and dissolve it in 155 ml of deionized water , stir with a magnetic stirrer until the precipitate completely disappears to obtain a clear solution, add 22 ml of sodium hydroxide solution under stirring, heat to 55 °C after stirring for 25 minutes, mix the prepared yttrium chloride solution with the heating solution, and the mixing ratio Based on the stoichiometric ratio of europium and yttrium being 2.5:11.5, stir to obtain a suspension without precipitation;

[0028] (2) Transfer the suspension to a reaction kettle lined with polytetrafluoroethylene, put the reaction kettle into a muffle furnace and heat the reaction at a temperature of 225 ° C, react for 19...

Embodiment 3

[0034] A fluorescent material applied to an LED lamp, the preparation method comprising the following steps:

[0035] (1) Dissolve yttrium oxide in hydrochloric acid with a concentration of 3.0 mol / L to prepare a yttrium chloride solution with a concentration of 0.35 mol / L, weigh 0.55 mol of europium nitrate hexahydrate, and dissolve it in 160 ml of deionized water , stir with a magnetic stirrer until the precipitate completely disappears to obtain a clear solution, add 25 ml of sodium hydroxide solution under stirring, heat to 60 °C after stirring for 30 minutes, mix the prepared yttrium chloride solution with the heating solution, and the mixing ratio Based on the stoichiometric ratio of europium and yttrium being 3:12, stir to obtain a suspension without precipitation;

[0036] (2) Transfer the suspension to a reaction kettle lined with polytetrafluoroethylene, put the reaction kettle into a muffle furnace and heat the reaction at a temperature of 230 ° C, react for 20 hour...

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PUM

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Abstract

The invention relates to the technical field of research on luminescent materials for LED devices, and discloses a fluorescent material applied to LED lamps. The prepared precursor doped with rare earth ions has a spherical shape with a smooth surface, because the spherical shape has a higher coating Covering density and low astigmatism, can effectively reduce non-radiation and astigmatism caused by rough surface, can very effectively improve the luminous intensity and the resolution of the display, the combination of vanadium ions and rare earth ions, under high temperature calcination, vanadium The energy of the ion and the charge transfer band is easy to match with the energy difference between the energy levels of the rare earth ion. The excited state of the rare earth ion is relatively high, so it can form a charge transfer state to emit light and continuously and stably supply energy, thereby effectively improving the use stability and service life.

Description

technical field [0001] The invention belongs to the technical field of research on luminescent materials for LED devices, and in particular relates to a fluorescent material applied to LED lamps. Background technique [0002] LED has the advantages of low power consumption, small size, high reliability, long life and fast response, and has been used in [0003] Instruments, computers, automobiles, electronic toys, communications, automatic control, military and other fields. Due to the great improvement of luminous efficiency and luminous intensity, reaching candlelight-level brightness, high-power LEDs have been gradually used in traffic signal light systems for roads, railways and airports, automobile taillights, brake lights and direction lights, and outdoor large-screen information display And full-color TV display system, etc. Scientists predict that high-power LED lighting will replace the ordinary light bulb invented by Edison and become a new light source in the 21...

Claims

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Application Information

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IPC IPC(8): C09K11/82
CPCC09K11/7794
Inventor 刘东
Owner 刘东
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