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Terbium-doped lead-cadmium fluoride up-conversion luminescent material, its preparation method and organic light-emitting diode

A technology of luminescent materials and fluorides, used in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc.

Inactive Publication Date: 2014-08-06
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-doped lead-cadmium 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-doped lead-cadmium fluoride up-conversion luminescent material, its preparation method and organic light-emitting diode
  • Terbium-doped lead-cadmium fluoride up-conversion luminescent material, its preparation method and organic light-emitting diode
  • Terbium-doped lead-cadmium fluoride up-conversion luminescent material, its preparation method and organic light-emitting diode

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preparation example Construction

[0028] The preparation method of the above-mentioned terbium-doped lead-cadmium fluoride up-conversion luminescent material comprises the following steps:

[0029] Step S11, according to Pb y Cd 1-y f 2 :xTb 3+ The stoichiometric ratio of each element is weighed as PbF 2 , CdF 2 and TbF 3 Powder, wherein x is 0.01-0.08, and y is 0.1-0.8.

[0030] In this step, preferably, x is 0.05 and y is 0.6.

[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 solvent is ammonia water.

[0035] In this step, the dispersant is dripped together wit...

Embodiment 1

[0045] Choose PbF 2 , CdF 2 and TbF 3The powder is mixed according to the molar number of each component being 0.6mmol, 0.4mmol and 0.05mmol. After mixing, dissolve in the hydrofluoric acid solvent, drop oxalic acid 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, 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 of Pb 0.6 Cd 0.4 f 2 : 0.05Tb 3+ Terbium-doped lead-cadmium fluoride up-conversion luminescent material.

[0046] The sequentially stacked substrate 1 uses soda-lime glass, the cathode 2 uses a metal Ag layer, and the organic light-emitting layer 3 uses Ir(piq)2(aca...

Embodiment 2

[0051] Choose PbF 2 , CdF 2 and TbF 3 The powder is mixed according to the molar number of each component being 0.1mmol, 0.9mmol and 0.08mmol. After mixing, dissolve in the hydrofluoric 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, 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 of Pb 0.1 Cd 0.9 f 2 : 0.08Tb 3+ Terbium-doped lead-cadmium fluoride up-conversion luminescent material.

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Abstract

The invention discloses a terbium-doped lead-cadmium fluoride up-conversion luminescent material. The terbium-doped lead-cadmium fluoride up-conversion luminescent material has a general chemical formula of PbyCd1-yF2: xTb<3+>, wherein x is in a range of 0.01-0.08 and y is in a range of 0. 1-0.8. In the photoluminescence spectrum of the terbium-doped lead-cadmium fluoride up-conversion luminescent material, the terbium-doped lead-cadmium fluoride up-conversion luminescent material has excitation wavelength of 796nm, and in the zone of the wavelength of 485nm, 5D4-to-7F6 transition radiation of Tb<3+> ions is produced so that a luminescence peak is formed. The terbium-doped lead-cadmium fluoride up-conversion luminescent material can be used as a blue light emitting material. The invention also provides a preparation method of the terbium-doped lead-cadmium fluoride up-conversion luminescent material and an organic light-emitting diode using the terbium-doped lead-cadmium fluoride up-conversion luminescent material.

Description

technical field [0001] The invention relates to a terbium-doped lead-cadmium fluoride 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-doped lead-cadmium fluoride up-conver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66H01L51/54
Inventor 周明杰王平陈吉星黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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