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Praseodymium and holmium co-doping lead fluoride, alkali and yttrium up-conversion luminescent material as well as preparation method and application thereof

A lead fluoride base, luminescent material technology, used in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc.

Inactive Publication Date: 2015-03-25
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, the up-conversion luminescent material of praseodymium-holmium co-doped lead fluoride alkali yttrium that can be excited by long-wave radiation such as infrared and red-green light to emit blue light has not been reported yet.

Method used

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  • Praseodymium and holmium co-doping lead fluoride, alkali and yttrium up-conversion luminescent material as well as preparation method and application thereof
  • Praseodymium and holmium co-doping lead fluoride, alkali and yttrium up-conversion luminescent material as well as preparation method and application thereof
  • Praseodymium and holmium co-doping lead fluoride, alkali and yttrium up-conversion luminescent material as well as preparation method and application thereof

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Experimental program
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Effect test

preparation example Construction

[0027] The preparation method of the above-mentioned praseodymium-holmium co-doped lead fluoride alkali yttrium up-conversion luminescent material comprises the following steps:

[0028] Step S11, according to aPbF 4 -bRF-cYF 3 :xPr 3+ ,yHo 3+ The stoichiometric ratio of each element is weighed as PbO 2 , R 2 CO 3 , Pr 2 o 3 , Pr 2 o 3 and Ho 2 o 3 Powder, wherein a is 0.1-0.24, b is 0.05-0.15, c is 0.55-0.7, x is 0.01-0.08, y is 0.01-0.06, R is lithium, sodium, potassium, rubidium and cesium at least one of the elements.

[0029] In this step, preferably, a is 0.2, b is 0.08, c is 0.65, x is 0.04, and y is 0.03.

[0030] Step S13, mixing and dissolving the powder weighed in step S11 evenly in an acidic solvent for crystallization treatment to obtain crystals, dissolving the crystals in the solvent, and then adding ammonia water to adjust the pH value to 1-6 to obtain a mixed solution.

[0031] In this step, preferably, the acidic solvent includes hydrofluoric ac...

Embodiment 1

[0042] Choose PbO 2 , Li 2 CO 3 , Y 2 o 3 , Pr 2 o 3 and Ho 2 o 3 The powder is mixed according to the number of moles of each component being 0.2mmol, 0.08mmol, 0.65mmol, 0.02mmol and 0.015mmol. After mixing, dissolve in a hydrofluoric acid solvent for crystallization treatment to obtain crystals, then dissolve the crystals in distilled water and add ammonia water to the solution to adjust the pH value to 5. Then the mixed solution was transferred to a stainless steel reaction kettle lined with polytetrafluoroethylene, and kept at 300°C for 3 hours to obtain a precipitate. Then the obtained precipitate was repeatedly washed with ethanol and distilled water, evaporated to dryness at 100°C, put into a muffle furnace and burned at 950°C for 3 hours to obtain the general chemical formula 0.2PbF 4 -0.08LiF-0.65YF 3 : 0.04Pr 3+ , 0.03Ho 3+ up-converting phosphors.

[0043] see figure 2 , figure 2 Shown is the general chemical formula of the praseodymium-holmium co-...

Embodiment 2

[0048] Choose PbO 2 , Li 2 CO 3 , Y 2 o 3 , Pr 2 o 3 and Ho 2 o 3 The powder is mixed according to the number of moles of each component being 0.1mmol, 0.15mmol, 0.73mmol, 0.005mmol and 0.005mmol. After mixing, dissolve in a hydrofluoric acid solvent for crystallization treatment to obtain crystals, then dissolve the crystals in distilled water and add ammonia water to the solution to adjust the pH value to 5. Then the mixed solution was transferred to a stainless steel reaction kettle lined with polytetrafluoroethylene, and kept at 300°C for 3 hours to obtain a precipitate. Then the obtained precipitate was repeatedly washed with ethanol and distilled water, evaporated to dryness at 100°C, put into a muffle furnace and burned at 800°C for 2 hours to obtain the general chemical formula 0.1PbF 4 -0.15LiF-0.73YF 3 : 0.01Pr 3+ , 0.01Ho 3+ up-converting phosphors.

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Abstract

The invention provides a praseodymium and holmium co-doping lead fluoride, alkali and yttrium up-conversion luminescent material. A chemical formula of the praseodymium and holmium co-doping lead fluoride, alkali and yttrium up-conversion luminescent material is shown in aPbF4-bRF-cYF3:xPr<3+>, yHo<3+>, wherein a is 0.1-0.24, b is 0.05-0.15, c is 0.55-0.7, x is 0.01-0.08, y is 0.01-0.06, and R is at least one of lithium element, sodium element, potassium element, rubidium element and cesium element. In a photoluminescence spectra of the praseodymium and holmium co-doping lead fluoride, alkali and yttrium up-conversion luminescent material, the excitation wavelength of the praseodymium and holmium co-doping lead fluoride, alkali and yttrium up-conversion luminescent material is 578nm, a glow peak is formed in a wavelength region of 483nm by virtue of transition radiation of Pr<3+>ion 3P0->3H4, and the praseodymium and holmium co-doping lead fluoride, alkali and yttrium up-conversion luminescent material can be used as a blue light luminescent material. The invention also provides a preparation method of the praseodymium and holmium co-doping lead fluoride, alkali and yttrium up-conversion luminescent material and an organic light-emitting diode by using the up-conversion luminescent material.

Description

technical field [0001] The invention relates to a praseodymium-holmium co-doped lead fluoride alkali yttrium 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 up-conversion lumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85H01L51/54
Inventor 周明杰陈吉星王平冯小明
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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