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Blue phosphor as well as preparation method and application thereof

A blue phosphor and powder technology, applied in the field of blue phosphor and its preparation, can solve the problems of not satisfying full-spectrum WLED, weak saturated blue reduction ability, low value of special color rendering index, etc., and achieve high powder activity , Lower sintering temperature, simple preparation process

Pending Publication Date: 2019-10-15
WUYI UNIV
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Problems solved by technology

Although the combination of yttrium aluminum garnet yellow-green powder and nitride red powder can be used to package a WLED with a color rendering index of 95, due to the insufficient coverage of the blue spectrum in the spectrum of the WLED, the ability of the WLED to restore saturated blue is relatively weak. Weak, the value of the special color rendering index R12 is low, which does not meet the requirements of full-spectrum WLED

Method used

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  • Blue phosphor as well as preparation method and application thereof
  • Blue phosphor as well as preparation method and application thereof
  • Blue phosphor as well as preparation method and application thereof

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Embodiment 1

[0039] In this embodiment, the effect of the n value on the luminescence performance of the blue phosphor is investigated.

[0040] The preparation method of the blue fluorescent powder comprises the following steps:

[0041] (1) According to the chemical formula SrAl 2 SiO 6 : n Eu 2+ The relative molecular mass and molecular formula of the corresponding elements in Strontium Carbonate, Europium Oxide, Aluminum Hydroxide, Ethyl Orthosilicate and Dehydrated Ethanol are weighed, and the specific amounts are shown in Table 1;

[0042] (2) strontium carbonate, europium oxide, and aluminum hydroxide taken by weighing in step (1) are dissolved with nitric acid respectively, then mix homogeneously with tetraethyl orthosilicate and dehydrated alcohol taken in step (1);

[0043] (3) Stir the mixture obtained in step (2) at 60° C. for 30 minutes, and dry the sample in an oven for 6 hours;

[0044] (4) After the sample in step (3) is completely dried, scrape it off and grind it, an...

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Abstract

The invention relates to a blue phosphor as well as a preparation method and application thereof, and belongs to the technical field of phosphors for light-emitting diodes (LEDs) in the fields of illumination and display. According to the preparation method, Eu<2+> is used as an activator to prepare SrAl2SiO6:nEu<2+>(n=0.006-0.008) blue phosphor by a sol-gel method. By adopting the preparation method provided by the invention, the raw materials can be uniformly mixed, and the powder activity is high, thereby greatly reducing the sintering temperature in a later stage, saving energy, and facilitating the reaction; a formed sample is good in purity, and can be matched with an ultraviolet type and / or a near ultraviolet type LED chip; the preparation process is simple, and the production process is easy to operate.

Description

technical field [0001] The invention relates to a blue fluorescent powder, a preparation method and application thereof, and belongs to the technical field of fluorescent powder for light-emitting diodes (LEDs) in the field of illumination and display. Background technique [0002] Semiconductor lighting has become the mainstream trend of modern lighting because of its advantages such as high efficiency, energy saving, and environmental protection. In recent years, the world's LED industry has continued to innovate and develop phosphor research, and has paid more and more attention to the application of lighting. At the same time, the LED manufacturing process has also been continuously improved and optimized. my country has also begun to pay attention to the field of healthy lighting and plan and re-layout the LED industry. LED lighting is developing in the direction of healthy, green and high-color lighting devices. "Illumination should be people-oriented" has become the c...

Claims

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Application Information

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IPC IPC(8): C09K11/64H01L33/50
CPCC09K11/7731H01L33/502
Inventor 王忆韦飞龙王梦霞
Owner WUYI UNIV
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