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Neodymium/ytterbium double-doped rare earth titanate up-conversion luminescent material, preparation method and organic light-emitting diode

A technology of rare earth titanates and luminescent materials, applied in the fields of 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, Nd-Yb double-doped rare-earth titanate 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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  • Neodymium/ytterbium double-doped rare earth titanate up-conversion luminescent material, preparation method and organic light-emitting diode
  • Neodymium/ytterbium double-doped rare earth titanate up-conversion luminescent material, preparation method and organic light-emitting diode
  • Neodymium/ytterbium double-doped rare earth titanate 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 neodymium-ytterbium double-doped rare-earth titanate up-conversion luminescent material comprises the following steps:

[0029] Step S11, according to Me 2 Ti 2 o 7 :xNd 3+ ,yYb 3+ The stoichiometric ratio of each element is called Me 2 o 3 ,TiO 2 ,Nd 2 o 3 and Yb 2 o 3 The powder, wherein, x is 0.01-0.08, y is 0-0.1, and Me is one of lanthanum, gadolinium and lutetium.

[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 hydrochloric acid, sulfuric acid or nitric acid;

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

[0034] In this step, preferably, the alkaline so...

Embodiment 1

[0045] Choose La 2 o 3 ,TiO 2 ,Nd 2 o 3 and Yb 2 o 3 The powder is mixed according to the number of moles of each component being 1.89mmol, 2mmol, 0.05mmol and 0.06mmol. After mixing, dissolve in hydrochloric acid, add oxalic acid dropwise as a dispersant and add ammonia water to make the mixed solution no longer precipitate, continue to add ammonia water dropwise, adjust the pH value of the mixed solution to about 8, let it stand for 2 hours to make the precipitation complete, and use a filter bucket Collect the precipitate by filtration, then wash the precipitate repeatedly with absolute ethanol and distilled water, and finally place the collected precipitate in a muffle furnace and bake it at 1000°C for 2 hours to obtain the general chemical formula La 2 Ti 2 o 7 : 0.05Nd 3+ ,0.06Yb 3+ Neodymium-ytterbium double-doped rare-earth titanate up-conversion luminescent material.

[0046] The sequentially stacked substrate 1 uses soda-lime glass, the cathode 2 uses a me...

Embodiment 2

[0051] Choose La 2 o 3 ,TiO 2 ,Nd 2 o 3 and Yb 2 o 3 The powder is mixed according to the number of moles of each component being 1.82mmol, 2mmol, 0.08mmol and 0.1mol. After mixing, dissolve in hydrochloric acid, add ethanol dropwise as a dispersant, and add ammonia water at the same time to make the mixed solution no longer precipitate, continue to add dropwise ammonia water, adjust the pH value of the mixed solution to about 8, let it stand for 2 hours to make the precipitation complete, and use a filter bucket Collect the precipitate by filtration, then wash the precipitate repeatedly with absolute ethanol and distilled water, and finally place the collected precipitate in a muffle furnace and bake it at 900°C for 2 hours to obtain the general chemical formula La 2 Ti 2 o 7 : 0.08Nd 3+ ,0.1Yb 3+ Neodymium-ytterbium double-doped rare-earth titanate up-conversion luminescent material.

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Abstract

The invention relates to a neodymium / ytterbium double-doped rare earth titanate up-conversion luminescent material, which comprises a following general chemical formula as follows: Me2Ti2O7: xNd<3+>, yYb<3+>, wherein x is 0.01-0.08, y is 0-0.1, and Me is one element of lanthanum, gadolinium and lutecium. In a photoluminescence spectrum of the neodymium / ytterbium double-doped rare earth titanate up-conversion luminescent material, the excitation wavelength of the neodymium / ytterbium double-doped rare earth titanate up-conversion luminescent material is 980nm, transition radiation of Nd<3+>ion <3>P0-<3>H4 forms a luminescence peak in a wavelength zone of 485nm, and the neodymium / ytterbium double-doped rare earth titanate up-conversion luminescent material can be taken as a blue light luminescent material. The invention also provides a preparation method of the neodymium / ytterbium double-doped rare earth titanate up-conversion luminescent material, and an organic light-emitting diode by using the neodymium / ytterbium double-doped rare earth titanate up-conversion luminescent material.

Description

technical field [0001] The invention relates to a neodymium-ytterbium double-doped rare-earth titanate 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, the Nd-Yb double-doped rare-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78H01L51/54
Inventor 周明杰王平陈吉星黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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