Praseodymium holmium co-doped niobate up-conversion luminescent material, preparation method and organic light-emitting diodes

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

Inactive Publication Date: 2014-10-29
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, praseodymium-holmium co-doped niobate up-conversion luminescent materials that can be excited by long-wave radiation such as infrared, red and green light to emit blue light have not been reported yet.

Method used

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  • Praseodymium holmium co-doped niobate up-conversion luminescent material, preparation method and organic light-emitting diodes
  • Praseodymium holmium co-doped niobate up-conversion luminescent material, preparation method and organic light-emitting diodes
  • Praseodymium holmium co-doped niobate up-conversion luminescent material, preparation method and organic light-emitting diodes

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Experimental program
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preparation example Construction

[0028] The preparation method of the above-mentioned praseodymium-holmium co-doped niobate up-conversion luminescent material comprises the following steps:

[0029] Step S11, according to MeNbO 3 :xPr 3+ ,yHo 3+ The stoichiometric ratio of each element is called Me 2 O, Nb 2 o 5 , Pr 2 o 3 and Ho 2 o 3 Powder, wherein x is 0.01-0.08, y is 0.01-0.06, and Me is one of lithium, sodium, potassium, rubidium and cesium.

[0030] In this step, preferably, x is 0.04 and y is 0.03.

[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 is 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 step, preferably, the alkaline solve...

Embodiment 1

[0045] Choose Li 2 O, Nb 2 o 5 , Pr 2 o 3 and Ho 2 o 3 The powder is mixed according to the molar number of each component being 1mmol, 1mmol, 0.04mmol and 0.03mmol. After mixing, dissolve in the hydrochloric acid solvent, 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 at 1000°C for 2 hours to obtain the general chemical formula of LiNbO 3 : 0.04Pr 3+ , 0.03Ho 3+ Praseodymium holmium co-doped niobate up-conversion luminescent material.

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

Embodiment 2

[0051] Choose Li 2 O, Nb 2 o 5 , Pr 2 o 3 and Ho 2 o 3 The powder is mixed according to the molar number of each component being 1mmol, 1mmol, 0.01mmol and 0.01mmol. After mixing, dissolve in the hydrochloric acid solvent, add ethanol 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, 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 at 900°C for 2 hours to obtain the general chemical formula LiNbO 3 : 0.01Pr 3+ , 0.01Ho 3+ Praseodymium holmium co-doped niobate up-conversion luminescent material.

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Abstract

A praseodymium holmium co-doped niobate up-conversion luminescent material has the following chemical general formula of MeNbO3:xPr<3+>, yHo<3+>, wherein x is 0.01-0.08, y is 0.01-0.06, and Me is one of lithium, sodium, potassium, rubidium and cesium elements. In a photoluminescence spectrum of the praseodymium holmium co-doped niobate up-conversion luminescent material, the excitation wavelength of the praseodymium holmium co-doped niobate up-conversion luminescent material is 578 nm, in a wavelength region of 483 nm, luminescence peaks can be produced by transition radiation from <3>P0 to <3>H4 of Pr<3+> ions, and the praseodymium holmium co-doped niobate up-conversion luminescent material can be used as a blue light luminescent material. The invention also provides a preparation method of the praseodymium holmium co-doped niobate up-conversion luminescent material, and organic light-emitting diodes using the praseodymium holmium co-doped niobate up-conversion luminescent material.

Description

technical field [0001] The invention relates to a praseodymium-holmium co-doped niobate 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 upconversion luminescent material of pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67H01L51/54
Inventor 周明杰陈吉星冯小明王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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