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Neodymium-ytterbium codoped lanthanum fluoride upconversion phosphor powder and preparation method thereof

A technology of co-doping and lanthanum fluoride, applied in the field of phosphors, achieves the effects of low energy consumption, simple preparation method and low cost

Inactive Publication Date: 2013-08-14
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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  • Neodymium-ytterbium codoped lanthanum fluoride upconversion phosphor powder and preparation method thereof
  • Neodymium-ytterbium codoped lanthanum fluoride upconversion phosphor powder and preparation method thereof
  • Neodymium-ytterbium codoped lanthanum fluoride upconversion phosphor powder and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0021] The preparation method of the above-mentioned neodymium ytterbium co-doped lanthanum fluoride up-conversion phosphor, such as figure 1 shown, including the following steps:

[0022] (1) Weigh LaF with a purity of 99.99% 3 , YbF 3 and NdF 3 The powder has a molar ratio of (92-99.3):(0.5-5):(0.2-3), preferably 96:3:1.

[0023] (2) Grind the powder in step (1) in a corundum mortar for 20 to 60 minutes, preferably 40 minutes, to obtain a uniform powder precursor, that is, a uniformly mixed LaF 3 , YbF 3 and NdF 3 Powder;

[0024] (3) Put the powder precursor in step (2) into a muffle furnace and burn at 800-1000°C (preferably 950°C) for 0.5-5 hours, preferably 3 hours; obtain a block sample

[0025] (4) Lower the temperature of the block sample to 250°C for 2 hours, then cool to room temperature with the furnace to obtain the target block product; take it out and grind it to obtain the general chemical formula LaF 3 :mYb 3+ , nNd 3+ Neodymium-ytterbium co-doped la...

Embodiment 1

[0030] Choose powder with a purity of 99.99%, LaF 3 , YbF 3 and NdF 3 Powder, the molar ratio is 96:3:1 (ie, the molar numbers are 0.96mmol, 0.03mmol, 0.01mmol respectively). Grind in a corundum mortar for 40 minutes to make it evenly mixed, and then burn it in a muffle furnace at 950°C for 3 hours to obtain a uniformly mixed powder precursor, and then place the powder precursor at a temperature of 900°C After burning for 3 hours, a lumpy sample was obtained. Then the block sample was cooled to 250°C for 2 hours, and then naturally cooled to room temperature to take out the block product and crush it to obtain LaF 3 :0.03Yb 3+ , 0.01Nd 3+ Up-conversion phosphors; among them, LaF 3 as matrix, Yb 3+ and Nd 3+ is the luminescent central ion.

[0031] figure 2 For the neodymium ytterbium co-doped lanthanum fluoride up-conversion phosphor powder and comparative example that are made in embodiment 1, namely undoped ytterbium lanthanum fluoride up-conversion phosphor powde...

Embodiment 2

[0034] Choose powder with a purity of 99.99%, LaF 3 , YbF 3 and NdF 3Powder, the molar ratio is 99.3:5:3 (ie, the molar numbers are 0.965mmol, 0.005mmol, 0.03mmol respectively). Grind in a corundum mortar for 20 minutes to make it evenly mixed, and then burn it in a muffle furnace obtained at 800°C for 3 hours to obtain a uniformly mixed powder precursor, and then place the powder precursor at a temperature of 800°C Burn for 5 hours to obtain a lumpy sample. Then the block sample was cooled to 250°C for 2 hours, and then naturally cooled to room temperature to take out the block product and crush it to obtain LaF 3 :0.005Yb 3+ , 0.03Nd 3+ Up-conversion phosphors; among them, LaF 3 as matrix, Yb 3+ and Nd 3+ is the luminescent central ion.

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Abstract

The invention belongs to the field of phosphor powders, and discloses a neodymium-ytterbium codoped lanthanum fluoride upconversion phosphor powder and a preparation method thereof. The chemical formula of the phosphor powder is LaF3:mYb<3+>,nNd<3+>, wherein LaF3 is as matrix, Yb<3+> and Nd<3+> are ions of a luminescent center, m is in the range of 0.005-0.05, and n is in the range of 0.002-0.03. The neodymium-ytterbium codoped lanthanum fluoride upconversion phosphor powder can achieve exciting out blue light shortwave luminescence by longwave radiation. Therefore, the phosphor powder can make up blue light material deficiencies in conventional displaying and luminescent materials.

Description

technical field [0001] The invention relates to the field of fluorescent powder, in particular to a neodymium-ytterbium co-doped lanthanum fluoride up-conversion fluorescent powder and a preparation method 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...

Claims

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Application Information

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IPC IPC(8): C09K11/85
Inventor 周明杰王平陈吉星张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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