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Post processing method for fluorescent powder of luminescent diode

A technology of light-emitting diodes and phosphors, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous brightness and efficacy of phosphors, difficult semiconductor lighting applications, etc., to achieve improved luminous performance, improved emission intensity, and improved crystallization degree of effect

Active Publication Date: 2010-12-29
JIANGSU BREE OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the low luminous brightness and efficacy of the existing fluorescent powder for light-emitting diodes, it is difficult to well meet the application of semiconductor lighting. Features

Method used

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  • Post processing method for fluorescent powder of luminescent diode
  • Post processing method for fluorescent powder of luminescent diode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 10gY 2.93 Al 5 o 12 : Ce 0.07Yellow light-emitting fluorescent powder, uniformly dispersed in 10ml of HF aqueous solution with a concentration of 0.5M, stirred at room temperature for 45min, centrifuged, washed with deionized water for 3 times until the pH value is neutral, and then dispersed in HNO with a concentration of 0.5M 3 15ml aqueous solution, stirred at 25°C for 30min, after centrifugation, washed 4 times with deionized water until the pH value was neutral, washed 2 times with absolute ethanol, dried at 110°C; put the dried fluorescent powder in a corundum crucible Inside, under the protection of N2-H2 reducing atmosphere, heat to 1400°C, keep warm for 10h, then cool to room temperature with the furnace and release from the furnace, after crushing, pass through a 400 mesh sieve; take 10ml of absolute ethanol, 0.05g of aminopropyltriethoxy Silane and 10g of fluorescent powder after recovery treatment were prepared into a 50% suspension; while stirring, drop ...

Embodiment 2

[0031] Take 10gY 2.93 Al 5 o 12 : Ce 0.07 Yellow light-emitting phosphor, uniformly dispersed in 10ml of HF aqueous solution with a concentration of 1M, stirred at room temperature for 45min, centrifuged, washed with deionized water for 4 times to neutral pH, and then dispersed in 0.5M HNO 3 15ml aqueous solution, stirred at 25°C for 60min, after centrifugation, washed 4 times with deionized water until the pH value was neutral, washed 2 times with absolute ethanol, dried at 110°C; put the dried fluorescent powder in a corundum crucible Inside, under the protection of N2-H2 reducing atmosphere, heat to 1500 ° C, keep warm for 5 hours, cool to room temperature with the furnace, and take out after being crushed, and pass through a 400-mesh sieve; take 10ml of absolute ethanol, 0.05g of vinyl (2-methoxy ethoxy) silane and 10g of fluorescent powder after recovery treatment are prepared into a 50% suspension; while stirring, drop 0.02g of deionized water accounting for the weigh...

Embodiment 3

[0033] Take 10g of CaS:Eu red light-emitting phosphor, uniformly disperse in 10ml of HF aqueous solution with a concentration of 0.8M, stir at room temperature for 100min, centrifuge, wash with deionized water 4 times until the pH value is neutral, and then disperse in HNO with a concentration of 1.2M 3 15ml aqueous solution, stirred at 25°C for 60min, after centrifugation, washed 4 times with deionized water until the pH value was neutral, washed 2 times with absolute ethanol, dried at 110°C; put the dried fluorescent powder in a corundum crucible Inside, under the protection of the air, heat to 900 ° C, keep warm for 5 hours, cool to room temperature with the furnace, and take out the furnace, after crushing, pass through a 400-mesh sieve; take 10ml of absolute ethanol, 0.05g of thiopropyl trimethoxy silicon and restore The treated 10g phosphor powder was prepared into a 50% suspension; while stirring, drop 0.02g of deionized water accounting for the weight of the phosphor po...

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Abstract

The invention provides a treatment method for phosphor powder applied in light emitting diode, comprising first-time acid treatment, second-time acid treatment, high-temperature restoring treatment, silanization treatment and drying treatment, etc. After the phosphor powder is treated by the method, the brightness of the phosphor powder is not decreased but is increased slightly. At the same time, compared with the light emitting diode, of which the phosphor without treated, the luminous flux and weather resistance of monochrome light emitting diode or white light emitting diode processed by the post treatment method provided in the invention, is improved remarkably.

Description

technical field [0001] The invention relates to a post-treatment method for fluorescent powder, in particular to a post-treatment method for fluorescent powder used in light-emitting diodes. Background technique [0002] Because ultra-high brightness and white light LEDs have made new breakthroughs in technology in recent years, and have three outstanding advantages: energy saving, environmental protection, and long life, their application fields have continued to expand, and they have entered the field of special lighting. Therefore, major developed countries in the world The large group companies related to the country have invested manpower and material resources in the research and development of ultra-high brightness LEDs, and formulated development plans, hoping to break through technical difficulties as soon as possible and enter the lighting field. [0003] Phosphor powder, as the key material of light-emitting diodes for semiconductor lighting, has a crucial impact ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/00
Inventor 何锦华梁超符义兵蒋建清董岩邵起越
Owner JIANGSU BREE OPTRONICS CO LTD
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