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Praseodymium and ytterbium codope titanium dioxide up-conversion luminescent material and preparation method and application thereof

A technology of titanium dioxide and luminescent materials, applied in the fields of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc.

Active Publication Date: 2013-04-17
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, the up-conversion luminescent material of praseodymium and ytterbium co-doped titanium dioxide, which can be excited by long-wave radiation such as infrared, red and green light, and emits blue light, has not been reported yet.

Method used

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  • Praseodymium and ytterbium codope titanium dioxide up-conversion luminescent material and preparation method and application thereof
  • Praseodymium and ytterbium codope titanium dioxide up-conversion luminescent material and preparation method and application thereof
  • Praseodymium and ytterbium codope titanium dioxide up-conversion luminescent material and preparation method and application thereof

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preparation example Construction

[0023] The preparation method of the above-mentioned praseodymium-ytterbium co-doped titanium dioxide up-conversion luminescent material comprises the following steps:

[0024] Step S11, according to TiO 2 :xPr 3+ ,yYb 3+ The stoichiometric ratio of each element weighs TiO 2 , Pr 2 o 3 and Yb 2 o 3 Powder, where 0.02≤x≤0.1, 0.02≤y≤0.2.

[0025] In this step, preferably, x is 0.06 and y is 0.1.

[0026] It can be understood that TiO can also be weighed in this step 2 , Pr 2 o 3 and Yb 2 o 3 powder and mix evenly, where TiO 2 , Pr 2 o 3 and Yb 2 o 3 The mass ratio is 0.68-0.784:0.033-0.165:0.039-0.394, preferably 0.736:0.099:0.197.

[0027] Step S13, mixing the powder weighed in step S11 evenly to obtain a precursor.

[0028] In this step, the powder is ground in a corundum bowl for 20 minutes to 60 minutes to obtain a homogeneously mixed precursor, preferably for 40 minutes.

[0029] Step S15, burning the precursor at 800°C-1000°C for 0.5-5 hours, then cooli...

Embodiment 1

[0038] Use powder with a purity of 99.99%, TiO 2 , Pr 2 o 3 and Yb 2 o 3The powder has a mass ratio of 0.736g:0.099g:0.197g. Grind in a corundum mortar for 40 minutes to mix well, then fire at 950 °C for 3 hours. Then cool to 250°C and keep it warm for 2 hours, then naturally cool to room temperature to take out the bulk product and pulverize it to obtain the general chemical formula of TiO 2 :0.06Pr 3+ , 0.1Yb 3+ up-converting phosphors.

[0039] see figure 2 , figure 2 Shown are the obtained praseodymium-ytterbium co-doped titania up-conversion luminescent material and samples without ytterbium (the general chemical formula is TiO 2 :0.06Pr 3+ ) photoluminescence spectrum. Depend on figure 2 It can be seen that the excitation wavelength of the praseodymium-ytterbium co-doped titanium dioxide up-conversion luminescent material obtained in this embodiment is 980nm, and in the 485nm wavelength region, Pr 3+ ion 3 P 0 → 3 h 4 The transition radiation of the ...

Embodiment 2

[0042] Choose powder with a purity of 99.99%, TiO 2 , Pr 2 o 3 and Yb 2 o 3 The powder has a mass ratio of 0.784g:0.033g:0.039g. Grind in a corundum mortar for 20 minutes to mix well, then fire at 800°C for 5 hours. Then cool to 100 ° C for 3 hours, then naturally cool to room temperature to take out the bulk product and pulverize it to obtain TiO 2 :0.02Pr 3+ , 0.02Yb 3+ Up-converting phosphors.

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Abstract

The invention provides a praseodymium and ytterbium codope titanium dioxide up-conversion luminescent material, the chemical formula of which is as follows: TiO2:xPr3+, yYb3+, wherein x is more than or equal to 0.02 and less than or equal to 0.1, and y is more than or equal to 0.02 and less than or equal to 0.2. In the photoluminescence spectra of the praseodymium and ytterbium codope titanium dioxide up-conversion luminescent material, the excitation wave length of the praseodymium and ytterbium codope titanium dioxide up-conversion luminescent material is 980nm, and in 485nm wave length area, the glow peak is formed by the transition radiation of Pr3+ ion 3P0->3H4, thus being used as blue light luminescence materials. The invention also provides a preparation method of the praseodymium and ytterbium codope titanium dioxide up-conversion luminescent material, and an organic light emitting diode using the praseodymium and ytterbium codope titanium dioxide up-conversion luminescent material.

Description

【Technical field】 [0001] The invention relates to a praseodymium-ytterbium co-doped titanium dioxide up-conversion light-emitting material, a preparation method and an organic light-emitting diode. 【Background technique】 [0002] Organic light-emitting diodes (OLEDs) are extremely widely used due to their simple component structure, cheap production cost, self-luminescence, short response time, and bendability. 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, three-dimensional display, biomolecular fluorescent labeling, and infrared radiation detection. However, the up-conversion lum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67H01L51/54
Inventor 周明杰王平陈吉星张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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