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Yttrium oxide phosphors for up-conversion luminescence, and preparation method and application thereof

A technology of phosphor powder and yttrium oxide is applied in the field of phosphor powder to achieve the effects of low energy consumption, simple preparation method and low cost

Inactive Publication Date: 2013-04-24
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still few reports on the field of preparing phosphors and applying them to OLEDs.

Method used

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  • Yttrium oxide phosphors for up-conversion luminescence, and preparation method and application thereof
  • Yttrium oxide phosphors for up-conversion luminescence, and preparation method and application thereof
  • Yttrium oxide phosphors for up-conversion luminescence, and preparation method and application thereof

Examples

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preparation example Construction

[0024] The preparation method of the above-mentioned yttrium oxide up-conversion luminescent phosphor, such as figure 1 shown, including the following steps:

[0025] Step S1, according to the structural formula Y 2-x-y o 3 :xHo 3+ ,yYb 3+ The stoichiometric ratio of each element in the formula, weighing the powder: Y 2 o 3 、Ho 2 o 3 and Yb 2 o 3 ;

[0026] Step S2, mixing and grinding the powder weighed in step S1 for 20-60 minutes to obtain a powder precursor;

[0027] Step S3, calcining the powder precursor in step S2 at 800-1000°C for 0.5-5 hours, then cooling down to 100-500°C, keeping it at this temperature for 0.5-3 hours and then cooling to room temperature to obtain a block product ;

[0028] Step S4, grinding the bulk product in step S3 to obtain the yttrium oxide up-converted phosphor powder; the phosphor powder has a structural formula of Y 2-x-y o 3 :xHo 3+ ,yYb 3+ ; Among them, Ho 3+ and Yb 3+ for dopant ions;

[0029] Among them, the structura...

Embodiment 1

[0038] 1. Choose powder with a purity of 99.99%: Y 2 o 3 , Ho 2 o 3 and Yb 2 o 3 Powder, its mass is 2.24g, 0.113g and 0.197g respectively;

[0039] 2. Put the above powder in a corundum mortar and grind it for 40 minutes to mix it evenly to obtain a powder precursor;

[0040] 3. Put the powder precursor in a muffle furnace, burn it at 950°C for 3 hours, then cool it to 250°C and keep it for 3 hours, then cool it naturally to room temperature and take out the block product.

[0041] 4. Grinding and pulverizing the bulk product to obtain the structural formula Y 1.84 o 3 :0.06Ho 3+ , 0.1Yb 3+ Up-converting phosphors.

[0042] figure 2 The electroluminescence spectrogram of the yttrium oxide up-converting luminescent phosphor powder prepared in Example 1 and the phosphor powder not doped with Yb element in the comparative example; figure 2 It can be seen that curve 1 is the photoluminescence spectrum of the sample in Example 1, and the excitation wavelength is 640nm;...

Embodiment 2

[0044] 1. Choose powder with a purity of 99.99%: Y 2 o 3 , Ho 2 o 3 and Yb 2 o 3 Powder, the mass ratios are 2.39g, 0.038g and 0.039g respectively;

[0045] 2. Put the above powder in a corundum mortar and grind it for 20 minutes to mix it evenly to obtain a powder precursor;

[0046] 3. Put the powder precursor in a muffle furnace, burn it at 800°C for 5 hours, then cool it to 100°C and keep it for 3 hours, then cool it naturally to room temperature and take out the block product;

[0047] 4. Grinding and pulverizing the bulk product to obtain the structural formula Y 1.96 o 3 :0.02Ho 3+ , 0.02Yb 3+ Up-converting phosphors.

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Abstract

The invention belongs to the phosphor field, and discloses yttrium oxide phosphors for up-conversion luminescence, and a preparation method and an application thereof. The phosphors have a structural formula of Y2-x-yO3:xHo3+, yYb3+, wherein Ho3+ and Yb3+ are doping ions; x value ranges from 0.02 to 0.1; and y value ranges from 0.02 to 0.2. The yttrium oxide phosphors for up-conversion luminescence prepared by the invention can excite short-wavelength luminescence of blue light by long-wavelength radiation from infrared to green light, so that the phosphors can make up the insufficiency of blue light materials in present display and luminescent materials.

Description

technical field [0001] The invention relates to a fluorescent powder, in particular to a yttrium oxide up-converted fluorescent powder and a preparation method and application thereof. Background technique [0002] The full name of OLED is Organic Light Emitting Diode, organic light emitting diode. It has many advantages. Its component structure is simple, its production cost is cheap, and its self-luminous characteristics, coupled with OLED's short response time and bendable characteristics, make it a very wide range of applications. However, it is difficult to obtain stable and efficient OLED blue light materials, which greatly limits the development of white light OLED devices and light source industries. [0003] Up-conversion fluorescent materials can emit visible light and even ultraviolet light under the excitation of long-wave (such as infrared) radiation, and have broad application prospects in the fields of optical fiber communication technology, fiber amplifier, ...

Claims

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Application Information

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IPC IPC(8): C09K11/78H01L51/54
Inventor 周明杰王平陈吉星张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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