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Cerium/europium-codoped alkaline-earth niobium zincate luminescent material, and preparation method and application thereof

A technology of niobate zincate and luminescent material, applied in luminescent materials, chemical instruments and methods, semiconductor devices, etc.

Inactive Publication Date: 2015-06-03
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, cerium and europium co-doped alkaline earth niobate zincate luminescent materials that can be applied to thin film electroluminescent displays have not been reported yet.

Method used

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  • Cerium/europium-codoped alkaline-earth niobium zincate luminescent material, and preparation method and application thereof
  • Cerium/europium-codoped alkaline-earth niobium zincate luminescent material, and preparation method and application thereof
  • Cerium/europium-codoped alkaline-earth niobium zincate luminescent material, and preparation method and application thereof

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preparation example Construction

[0033] The preparation method of the above-mentioned cerium and europium co-doped alkaline earth niobium zincate luminescent material comprises the following steps:

[0034] Step S11, according to Me 3-x-y ZnNb 2 o 9 :xCe 3+ ,yEu 3+ The stoichiometric ratio of each element weighs MeO, ZnO, Nb 2 o 5 , CeO 2 and Eu 2 o 3 The powder is uniformly mixed, wherein, x is 0.01-0.05, y is 0.01-0.08, and MeO is at least one selected from calcium oxide, strontium oxide and barium oxide.

[0035] Step S12, sintering the mixed powder at 900°C-1300°C for 0.5-5 hours to obtain cerium-europium co-doped alkaline earth niobium zincate luminescent material, whose chemical formula is Me 3-x-y ZnNb 2 o 9 :xCe 3+ ,yEu 3+ , wherein, x is 0.01-0.05, y is 0.01-0.08, and Me is at least one selected from calcium element, strontium element and barium element.

[0036] In this step, it is preferable to sinter at 1250° C. for 3 hours.

[0037] A cerium-europium co-doped alkaline earth niobate...

Embodiment 1

[0063] Choose powder with a purity of 99.99%, and mix CaO, ZnO, Nb 2 o 5 , CeO 2 and Eu 2 o 3 The powder is uniformly mixed according to the molar number of 3.93mmol, 1mmol, 1mmol, 0.03mmol and 0.02mmol, and then sintered at 1250°C to form a ceramic target with a diameter of 50mm and a thickness of 2mm, and the target is placed in a vacuum chamber . Then, the glass substrate with ITO was ultrasonically cleaned with acetone, absolute ethanol and deionized water successively, treated with oxygen plasma, and placed in a vacuum chamber. The distance between the target and the substrate is set to 60mm. Use a mechanical pump and a molecular pump to pump the vacuum of the cavity to 5.0×10 -4 Pa, the working gas flow rate of oxygen is 20sccm, the pressure is adjusted to 3.0Pa, the substrate temperature is 500°C, and the laser energy is 150mJ. The chemical formula of the obtained sample is Ca 3.93 ZnNb 2 o 9 : 0.03Ce 3+ ,0.04Eu 3+ A luminescent film with a thickness of 180n...

Embodiment 2

[0069] Choose powder with a purity of 99.99%, and mix CaO, ZnO, Nb 2 o 5 , CeO 2 and Eu 2 o 3 The powder is 3.98mmol, 1mmol, 1mmol, 0.01mmol and 0.005mmol according to the molar number. After uniform mixing, it is sintered at 900°C to form a ceramic target with a diameter of 50mm and a thickness of 2mm, and the target is placed in a vacuum chamber in vivo. Then, the glass substrate with ITO was ultrasonically cleaned with acetone, absolute ethanol and deionized water successively, treated with oxygen plasma, and placed in a vacuum chamber. The distance between the target and the substrate was set to 45 mm. Use a mechanical pump and a molecular pump to evacuate the vacuum of the chamber to 1.0×10 -3 Pa, the working gas flow rate of oxygen is 10sccm, the pressure is adjusted to 0.5Pa, the substrate temperature is 250°C, and the laser energy is 80mJ. The chemical formula of the obtained sample is Ca 3.98 ZnNb 2 o 9 : 0.01Ce 3+ ,0.01Eu 3+ A luminescent film with a thic...

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Abstract

The invention provides a cerium / europium-codoped alkaline-earth niobium zincate luminescent material of which the chemical formula is Me[3-x-y]ZnNb2O9:xCe<3+>,yEu<3+>, wherein x is 0.01-0.05, y is 0.01-0.08, and Me is selected from at least one of calcium, strontium and barium. The light-emitting film prepared from the cerium / europium-codoped alkaline-earth niobium zincate luminescent material has strong light-emitting peaks at the wavelength of 490nm and 560nm in the electroluminescent spectrum (EL), and thus, is applicable to film electroluminescent display devices. The invention also provides a preparation method and application of the cerium / europium-codoped alkaline-earth niobium zincate luminescent material.

Description

【Technical field】 [0001] The invention relates to a luminescent material of cerium and europium co-doped alkaline earth niobium zincate, a preparation method thereof, a luminescent thin film of cerium and europium co-doped alkaline earth niobium zincate, a preparation method thereof, a thin film electroluminescent device and a preparation method thereof. 【Background technique】 [0002] Thin film electroluminescent display (TFELD) has attracted widespread attention and developed rapidly due to its advantages such as active light emission, full solid state, impact resistance, fast response, large viewing angle, wide application temperature, and simple process. At present, the research on color and even full-color TFELD and the development of multi-band luminescent materials are the development direction of this subject. However, cerium-europium co-doped alkaline earth niobate zincate luminescent materials that can be applied to thin film electroluminescent displays have not be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67H01L33/50
Inventor 周明杰陈吉星王平黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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