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Yttrium silicate upconversion luminous fluorescent powder, preparation method and application thereof

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

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

AI Technical Summary

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 silicate upconversion luminous fluorescent powder, preparation method and application thereof
  • Yttrium silicate upconversion luminous fluorescent powder, preparation method and application thereof
  • Yttrium silicate upconversion luminous fluorescent powder, preparation method and application thereof

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preparation example Construction

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

[0025] Step S1, according to the structural formula Y 2-x SiO 5 :xHo 3+ The stoichiometric ratio of each element in the formula, weighing the powder: Y 2 o 3 , SiO 2 and Ho 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 silicate up-converted luminescent phosphor; the structural formula of the phosphor is Y 2-x SiO 5 :xHo 3+ ; Among them, Ho 3+ for dopant ions;

[0029] Among them, the structural formula Y 2-x SiO 5 :xH...

Embodiment 1

[0038] 1. Choose powder with a purity of 99.99%: Y 2 o 3 , SiO 2 and Ho 2 o 3 Powder, the masses of which are 0.37g, 0.8g and 0.113g 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 1.94 SiO 5 :0.06Ho 3+ Up-converting phosphors.

[0042] figure 2 For the electroluminescent spectrogram of the fluorescent powder of the yttrium silicate up-conversion luminescence that embodiment 1 makes; By figure 2 It can be seen that the excitation wavelength is 640nm, and the obtained luminescence peak at 490nm corresponds to Ho 3+ ion 5 f 3 → 5 1 8 The transition radiates luminescence.

Embodiment 2

[0044] 1. Choose powder with a purity of 99.99%: Y 2 o 3 , SiO 2 and Ho 2 o 3 Powder, the mass ratios are 2.32g, 0.8g and 0.150g 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 at 800°C for 5 hours, then cool to 100°C for 3 hours, then cool naturally to room temperature to take out the block product;

[0047] 4. Grinding and pulverizing the bulk product to obtain the structural formula Y 1.9 SiO 5 :0.1Ho 3+ Up-converting phosphors.

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Abstract

The invention belongs to the field of fluorescent powder, and discloses an yttrium silicate upconversion luminous fluorescent powder, and a preparation method and application thereof. The fluorescent powder has a structure of Y2-xSiO5:xHo<3+>; Ho<3+> is a doping ion; and x is in the range from 0.02 to 0.1. The yttrium silicate upconversion luminous fluorescent powder prepared by the invention can realize blue short-wavelength light emitting through excitation by long-wave radiation from infrared to green ray. Therefore, the fluorescent powder can make up for the lack of blue material in current display and luminous material.

Description

technical field [0001] The invention relates to a fluorescent powder, in particular to a fluorescent powder with upconversion luminescence of yttrium silicate and its preparation method and application. 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,...

Claims

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Application Information

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IPC IPC(8): C09K11/79H01L51/54
Inventor 周明杰王平陈吉星张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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