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

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

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

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preparation example Construction

[0023] The preparation method of the above-mentioned oxyfluorosilicate up-converting luminescent phosphor, such as figure 1 shown, including the following steps:

[0024] Step S1, according to the mole percentage, weigh the powder: Na 2 CO 3 , 8~13%; LaF 3 , 6~11.5%; Al 2 o 3 , 25-32%; SiO 2 , 48~53%; Tm 2 o 3 , 0.5~3%;

[0025] Step S2, mixing and grinding the powder weighed in step S1 for 20-60 minutes to obtain a powder precursor;

[0026] Step S3, calcining the powder precursor in step S2 at 900-1400°C for 0.5-5 hours, then cooling down to 600-800°C, keeping it at this temperature for 0.5-3 hours and then cooling to room temperature to obtain a block product ;

[0027] Step S4, grinding the bulk product in step S3 to obtain the fluorescent powder of the oxyfluorosilicate upconversion luminescence; the structural formula of the fluorescent powder is aNa 2 O 3 -cAl 2 o 3 -dSiO 2 :eTm 3+ ; Among them, Tm 3+ are dopant ions, a, b, c, d, e are molar coefficient...

Embodiment 1

[0036] 1. Use powder with a purity of 99.99%: Na 2 CO 3 , LaF 3 , Al 2 o 3 , SiO 2 and Tm 2 o 3 Powder, its molar percentages are 11%, 9%, 29%, 50% and 1% respectively;

[0037] 2. Put the above powder in a corundum mortar and grind it for 40 minutes to mix it evenly to obtain a powder precursor;

[0038]3. Put the powder precursor in a muffle furnace, burn it at 1200°C for 3 hours, then cool it to 700°C and keep it for 2 hours, then cool it naturally to room temperature and take out the block product.

[0039] 4. Grind and pulverize the blocky product to obtain a structural formula of 0.11Na 2 O-0.09LaF 3 -0.29Al 2 o 3 -0.5SiO2 2 :0.01Tm 3+ Up-converting phosphors.

[0040] figure 2 It is the electroluminescence spectrogram of the fluorescent powder of the oxyfluorosilicate up-conversion luminescence that embodiment 1 makes; figure 2 As shown, the excitation wavelength is 796nm; among them, the luminescence peak at 475nm corresponds to Tm 3+ ion 1 G 4 → ...

Embodiment 2

[0042] 1. Use powder with a purity of 99.99%: Na 2 CO 3 , LaF 3 , Al 2 o 3 , SiO 2 and Tm 2 o 3 Powder, its molar percentages are 8%, 11.5%, 32%, 48% and 0.5% respectively;

[0043] 2. Put the above powder in a corundum mortar and grind it for 20 minutes to mix it evenly to obtain a powder precursor;

[0044] 3. Put the powder precursor in a muffle furnace, burn it at 900°C for 5 hours, then cool it to 600°C and keep it for 3 hours, then cool it naturally to room temperature to take out the block product;

[0045] 4. Grind and pulverize the blocky product to obtain a structural formula of 0.08Na 2 O-0.115LaF 3 -0.32Al 2 o 3 -0.48SiO 2 :0.005Tm 3+ Up-converting phosphors.

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Abstract

The invention belongs to the field of fluorescent powder, and discloses an oxyfluoride silicate upconversion fluorescent powder, and a preparation method and application thereof. The fluorescent powder has a structure of aNa2O-bLaF3-cAl2O3-dSiO2:eTm<3+>; Tm<3+> is a doping ion; and a, b, c, d and e represent molar coefficients, and satisfy the following relations: 0.08<=a<=0.13, 0.06<=b<=0.115, 0.25<=c<=0.32, 0.48<=d<=0.53, 0.005<=e<=0.03, and a+b+c+d+e=1. The oxyfluoride silicate upconversion fluorescence 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 oxyfluorosilicate up-conversion luminescence, 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 technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/86H01L51/54
Inventor 周明杰王平陈吉星黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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