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Holmium-doped alkali columbate up-conversion luminescent material and preparation method thereof, and organic light-emitting diode

A technology of alkali niobate and luminescent materials, applied in the directions of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc.

Inactive Publication Date: 2014-10-15
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 holmium-doped alkali niobate up-conversion luminescent material that can be excited by long-wave radiation such as infrared, red and green light to emit blue light has not been reported yet.

Method used

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  • Holmium-doped alkali columbate up-conversion luminescent material and preparation method thereof, and organic light-emitting diode
  • Holmium-doped alkali columbate up-conversion luminescent material and preparation method thereof, and organic light-emitting diode
  • Holmium-doped alkali columbate up-conversion luminescent material and preparation method thereof, and organic light-emitting diode

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preparation example Construction

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

[0029] Step S101, according to MeNbO 3 :xHo 3+ The stoichiometric ratio of each element is called Me 2 O, Nb 2 o 5 and Ho 2 o 3 Powder, wherein, x is 0.01-0.06, and Me is lithium, sodium, potassium, rubidium or cesium.

[0030] Preferably, x is 0.03.

[0031] It can be understood that Me can also be weighed according to the molar ratio 1: (0.94-0.99): (0.01-0.06) in this step 2 O, Nb 2 o 5 and Ho 2 o 3 Powder.

[0032] Preferably, in this step, Me can also be weighed according to the molar ratio of 1:0.97:0.03 2 O, Nb 2 o 5 and Ho 2 o 3 Powder.

[0033] Step S102 , dissolving the weighed powder in nitric acid to prepare a solution with a metal cation concentration of 0.5 mol / L˜3 mol / L.

[0034] The metal cation in solution is Me + , Nb 5+ , Ho 3+ , where Me + It is one of lithium ions, sodium ions, potassiu...

Embodiment 1

[0052] Weigh Li 2 O, Nb 2 o 5 and Ho 2 o 3 The molar numbers of the powders are 1mmol, 0.97mmol, and 0.03mmol respectively, which are dissolved in nitric acid to prepare a 1.5mol / L solution, and 1.2g of polyethylene glycol additive is added. Then put the solution into the atomization device, and then feed 5 L / min of argon gas into the atomization device. The solution precursor enters a quartz tube with a temperature of 1200°C along with the argon carrier gas to generate the precursor, wherein the diameter of the quartz tube is 95mm and the length is 1.4m. Then the phosphor enters the condenser along with the airflow, and is finally collected by the microporous acid-resistant filter funnel. Collect the precursor of the phosphor, place it in a temperature-programmed furnace and calcinate for 3 hours at a calcining temperature of 1100°C to obtain LiNbO 3 : 0.03Ho 3+ Up-converting phosphors.

[0053] The sequentially stacked substrate 1 uses soda-lime glass, the cathode 2 ...

Embodiment 2

[0058] Weigh Li 2 O, Nb 2 o 5 and Ho 2 o 3 The molar numbers of the powders are 1mmol, 0.99mmol, and 0.01mmol respectively, which are dissolved in nitric acid to prepare a 0.5mol / L solution, and 2g of polyethylene glycol additive is added. Then put the solution into the atomization device, and then pass 1 L / min of argon gas into the atomization device. The solution precursor enters a quartz tube with a temperature of 500°C along with the argon carrier gas to generate the precursor, wherein the diameter of the quartz tube is 150mm and the length is 3m. Then the phosphor enters the condenser along with the airflow, and is finally collected by the microporous acid-resistant filter funnel. Collect the precursor of the phosphor, place it in a temperature-programmed furnace and calcinate it for 5 hours at a calcining temperature of 1300°C to obtain LiNbO 3 : 0.01Ho 3+ Up-converting phosphors.

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Abstract

The invention provides a holmium-doped alkali columbate up-conversion luminescent material. The general chemical formula of the luminescent material is MeNbO3: xHo3+, wherein x is in a range of 0.01 to 0.06, and Me is one selected from the group consisting of lithium, sodium, potassium, rubidium and caesium. In the photoluminescence spectrum of the holmium-doped alkali columbate up-conversion luminescent material, the excitation wavelength of the holmium-doped alkali columbate up-conversion luminescent material is 640 nm, and a luminescence peak at 490 nm is formed by transition radiation of Ho3+ ions from 5F3 to 5I8. The invention further provides a preparation method for the holmium-doped alkali columbate up-conversion luminescent material and an organic light-emitting diode using the holmium-doped alkali columbate up-conversion luminescent material.

Description

technical field [0001] The invention relates to a holmium-doped alkali 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, holmium-doped alkali niobate up-conversion luminesce...

Claims

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Application Information

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IPC IPC(8): C09K11/67H01L51/54
Inventor 周明杰王平陈吉星张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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