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Fluorescent powder transmitting yellow light and method of producing the same

A phosphor powder, yellow light technology, applied in the field of phosphor powder, can solve the problem of low color rendering index of LED

Inactive Publication Date: 2009-02-18
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the yellow phosphor is mainly composed of Y3Al5O12(YAG):Ce, which lacks red light components. The color rendering index of the prepared LED is low. Therefore, the development of more efficient phosphors emitting yellow light will effectively improve the production technology level of white light-emitting diodes (LEDs)

Method used

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  • Fluorescent powder transmitting yellow light and method of producing the same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation formula is Y 2.93 Pb 0.01 Ce 0.06 al 5 o 12 yellow fluorescent powder.

[0016] Weigh 3.3081g Y according to the stoichiometric ratio of elements in the above formula 2 o 3 , 2.5491g Al 2 o 3 , 0.1033gCeO 2 , 0.0223g PbO, then weighed 0.1794g BaF 2 As a cosolvent; after fully grinding and mixing the weighed raw materials, put them into a high-purity corundum crucible and put them in a high-temperature furnace; 2 and N 2 Under the condition of reducing atmosphere, heating at 1500°C for 3 hours can obtain yellow fluorescent powder Y 2.93 Pb 0.01 Ce 0.06 al 5 o 12 .

Embodiment 2

[0018] The preparation formula is Y 2.89 Pb 0.05 Ce 0.06 al 5 o 12 yellow fluorescent powder.

[0019] Weigh 3.2630g Y according to the stoichiometric ratio of elements in the above formula 2 o 3 , 2.5491g Al 2 o 3 , 0.1033gCeO 2 , 0.1115g PbO, then weighed 0.1808g BaF 2 As a cosolvent; after fully grinding and mixing the weighed raw materials, put them into a high-purity corundum crucible and put them in a high-temperature furnace; 2 and N 2 Under the condition of reducing atmosphere, heating at 1500°C for 3 hours can obtain yellow fluorescent powder Y 2.89 Pb 0.05 Ce 0.06 al 5 o 12 .

Embodiment 3

[0021] The preparation formula is Y 2.84 Pb 0.1 Ce 0.06 al 5 o 12 yellow fluorescent powder.

[0022] Weigh 3.2065g Y according to the stoichiometric ratio of elements in the above formula 2 o 3 , 2.5491g Al 2 o 3 , 0.1033gCeO 2 , 0.2230g PbO, then weigh 0.1825g BaF 2 As a cosolvent; after fully grinding and mixing the weighed raw materials, put them into a high-purity corundum crucible and put them in a high-temperature furnace; 2 and N 2 Under the condition of reducing atmosphere, heating at 1500°C for 3 hours can obtain yellow fluorescent powder Y 2.84 Pb 0.1 Ce 0.06 al 5 o 12 .

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Abstract

The invention discloses fluorescent powder used in an LED, which relates to the technical field of lighting and displaying, in particular to fluorescent powder emitting yellow light used for manufacturing white light LED and a preparing method thereof. The fluorescent powder comprises the chemical compound with the following chemical formula: Y3-x-yPbxCeyAl5O12, wherein the x in the formula is equal to 0.01 to 0.10; y is equal to 0.003 to 0.2. The preparing method comprise the following steps: Y2O3, Al2O3, Ceo2 and PbO are respectively weighed according to the stoichiometric amount of each material, put in a corundum crucible and in a high-temperature furnace to be heated to 1300 to 1700 DEG C for 3 to 7 hours under the reducing atmosphere after being ground and mixed together with BaF2 used as the fluxing agent, and naturally cooled to obtain the fluorescent powder. Compared with Y3Al5O12:Ce fluorescent powder, the fluorescent powder has the advantages of the enhanced luminescence and red shift of the emission peak position, and the color rendering index of the LED made of the material is enhanced.

Description

technical field [0001] The invention relates to phosphor powder used in light-emitting diodes (LEDs) in the technical field of illumination and display, in particular to phosphor powder emitting yellow light for making white LEDs and a preparation method thereof. Background technique [0002] White light-emitting diodes (LEDs) are generally considered to be a new light source to replace traditional lighting devices in the 21st century. The scheme of producing white light mainly adopts the phosphor powder that emits yellow light to be coated on the GaN blue light LED chip. At present, the yellow phosphor is mainly based on Y 3 al 5 o 12 (YAG): Ce-based, the lack of red light components of this phosphor makes the prepared LED color rendering index low. Therefore, the development of more efficient phosphors that emit yellow light will effectively improve the efficiency of white light-emitting diodes (LEDs). production technology level. Contents of the invention [0003] ...

Claims

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Application Information

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IPC IPC(8): C09K11/80C01F7/02C01F17/00
CPCY02B20/181Y02B20/00
Inventor 张家骅王磊张霞
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI