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Terbium/ytterbium double-doped alkaline earth sodium yttrium fluoride up-conversion luminescent material, preparation method and organic light-emitting diode

A luminescent material and double-doping technology, applied in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc.

Inactive Publication Date: 2014-09-24
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, terbium-ytterbium double-doped alkaline earth yttrium fluoride up-conversion luminescent materials that can be excited by long-wave radiation such as infrared and red-green light to emit blue light have not been reported yet.

Method used

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  • Terbium/ytterbium double-doped alkaline earth sodium yttrium fluoride up-conversion luminescent material, preparation method and organic light-emitting diode
  • Terbium/ytterbium double-doped alkaline earth sodium yttrium fluoride up-conversion luminescent material, preparation method and organic light-emitting diode
  • Terbium/ytterbium double-doped alkaline earth sodium yttrium fluoride up-conversion luminescent material, preparation method and organic light-emitting diode

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preparation example Construction

[0028] The preparation method of the above-mentioned terbium-ytterbium double-doped alkaline earth yttrium fluoride salt up-conversion luminescent material comprises the following steps:

[0029] Step S11, according to MeY 2 f 8 :xTb 3+ ,yYb 3+ The stoichiometric ratio of each element is weighed as MeO, Y 2 o 3 , Tb 2 o 3 and Yb 2 o 3 Powder, wherein x is 0.01-0.08, y is 0-0.1, and Me is one of calcium, magnesium, strontium and barium elements.

[0030] In this step, preferably, x is 0.05 and y is 0.06.

[0031] Step S13, adding an acidic solvent to the powder weighed in step S11, and then simultaneously adding a dispersant and an alkaline solvent to obtain a mixture containing precipitates.

[0032] In this step, preferably, the acidic solvent includes hydrofluoric acid, ammonium fluoride or ammonium bifluoride.

[0033] In this step, preferably, the dispersant is oxalic acid, ethanol, triethanolamine, water-soluble starch or polyethylene glycol.

[0034] In this ...

Embodiment 1

[0045] Choose MgO, Y 2 o 3 , Tb 2 o 3 and Yb 2 o 3 The powder is mixed according to the molar number of each component being 0.89mmol, 1mmol, 0.05mmol and 0.06mmol. After mixing, dissolve in hydrofluoric acid, add oxalic acid dropwise as a dispersant and add ammonia water at the same time so that the mixed solution no longer produces precipitation, continue to add ammonia water dropwise, adjust the pH value of the mixed solution to about 8, and let it stand for 2 hours to make the precipitation complete. Collect the precipitate by filter funnel, then wash the precipitate repeatedly with absolute ethanol and distilled water, and finally place the collected precipitate in a muffle furnace and bake at 1000°C for 2 hours to obtain the general chemical formula MgY 2 f 8 : 0.05Tb 3+ ,0.06Yb 3+ A terbium-ytterbium double-doped alkaline earth yttrium fluoride salt up-conversion luminescent material.

[0046] The sequentially stacked substrate 1 uses soda-lime glass, the catho...

Embodiment 2

[0051] Choose MgO, Y 2 o 3 , Tb 2 o 3 and Yb 2 o 3 The powder is mixed according to the number of moles of each component being 0.82mmol, 1mmol, 0.08mmol and 0.1mol. After mixing, dissolve in hydrofluoric acid, add ethanol dropwise as a dispersant, and at the same time add ammonia water to make the mixed solution no longer produce precipitation, continue to add ammonia water dropwise, adjust the pH value of the mixed solution to about 8, and let it stand for 2 hours to make the precipitation complete. Collect the precipitate by filter funnel, then wash the precipitate repeatedly with absolute ethanol and distilled water, and finally place the collected precipitate in a muffle furnace and bake at 900°C for 2 hours to obtain the general chemical formula MgY 2 f 8 : 0.08Tb 3+ ,0.1Yb 3+ A terbium-ytterbium double-doped alkaline earth yttrium fluoride salt up-conversion luminescent material.

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Abstract

The invention relates to a terbium / ytterbium double-doped alkaline earth sodium yttrium fluoride up-conversion luminescent material, which comprises a following general chemical formula as follows: MeY2F8: xTb<3+>, yYb<3+>, wherein x is 0.01-0.08, y is 0-0.1, and Me is one element of calcium, magnesium, strontium and barium. In a photoluminescence spectrum of the terbium / ytterbium double-doped alkaline earth sodium yttrium fluoride up-conversion luminescent material, the excitation wavelength of the terbium / ytterbium double-doped alkaline earth sodium yttrium fluoride up-conversion luminescent material is 796nm, transition radiation of Tb<3+>ion<5>D4-<7>F6 forms a luminescence peak in a wavelength zone of 482nm, and the dysprosium-doped alkaline earth aluminosilicate up-conversion luminescent material can be taken as a blue light luminescent material. The invention also provides a preparation method of the terbium / ytterbium double-doped alkaline earth sodium yttrium fluoride up-conversion luminescent material, and an organic light-emitting diode by using the terbium / ytterbium double-doped alkaline earth sodium yttrium fluoride up-conversion luminescent material.

Description

technical field [0001] The invention relates to a terbium-ytterbium double-doped alkaline earth yttrium fluoride salt up-conversion luminescent material, a preparation method and an organic light-emitting diode. Background technique [0002] Organic light-emitting diodes (OLEDs) have been 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, terbium-ytter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85H01L51/54
Inventor 周明杰王平陈吉星黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD