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Europium- terbium- co-doped aluminium niobate luminescent materials, and preparing method and applications thereof

A technology of luminescent materials and co-doping, applied in luminescent materials, chemical instruments and methods, semiconductor devices, etc.

Inactive Publication Date: 2015-05-27
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, there is no report on the europium-terbium co-doped aluminum niobate luminescent material that can be applied to thin film electroluminescent displays.

Method used

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  • Europium- terbium- co-doped aluminium niobate luminescent materials, and preparing method and applications thereof
  • Europium- terbium- co-doped aluminium niobate luminescent materials, and preparing method and applications thereof
  • Europium- terbium- co-doped aluminium niobate luminescent materials, and preparing method and applications thereof

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preparation example Construction

[0034] The preparation method of the above-mentioned europium-terbium co-doped aluminum niobate luminescent material comprises the following steps:

[0035] Step S11, according to MeAl 1-x-y NbO 5 :xEu 3+ ,yTb 3+ The stoichiometric ratio of each element is measured as MeO, Al 2 o 3 , Nb 2 o 5 , Eu 2 o 3 and Tb 4 o 7 The powder is uniformly mixed, wherein, x is 0.01-0.08, y is 0.01-0.06, and MeO is one of calcium oxide, strontium oxide and barium oxide; and

[0036] Sinter the uniformly mixed powder at 900°C to 1300°C for 0.5 to 5 hours to obtain the chemical formula MeAl 1-x-y NbO 5 :xEu 3+ ,yTb 3+ Europium-terbium co-doped aluminum niobate luminescent material.

[0037] In this step, preferably, x is 0.04 and y is 0.03.

[0038] Step S12, sintering the mixed powder at 900°C-1300°C for 0.5-5 hours to obtain the europium-terbium co-doped aluminum niobate luminescent material, whose chemical formula is MeAl 1-x-y NbO 5 :xEu 3+ ,yTb 3+ .

[0039] In this step...

Embodiment 1

[0067] The powder with a purity of 99.99% is selected, and CaO, Al 2 o 3 , Nb 2 o 5 , Eu 2 o 3 and Tb 4 o 7 The powder is mixed according to the molar number of 1mmol, 0.465mmol, 0.5mmol, 0.02mmol and 0.0075mmol. After uniform mixing, it is sintered at 1250°C to form a ceramic target with a diameter of 50mm and a thickness of 2mm. into the 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 was set to 60 mm. 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 25 sccm, the pressure is adjusted to 2.0 Pa, and the substrate temperature is 500°C. The chemical formula of the obtained sample is CaAl 0.93 NbO5 : 0.04Eu 3+ ,0.03Tb 3+ luminescent thin film, and then the obtained luminescent thin f...

Embodiment 2

[0073] The powder with a purity of 99.99% is selected, and CaO, Al 2 o 3 , Nb 2 o 5 , Eu 2 o 3 and Tb 4 o 7 The powder is mixed according to the molar number of 1mmol, 0.49mmol, 0.5mmol, 0.005mmol and 0.0025mmol. After uniform mixing, it is sintered at 900°C to form a ceramic target with a diameter of 50mm and a thickness of 2mm. into the 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 was set to 45mm. 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 chemical formula of the obtained sample is CaAl 0.98 NbO 5 : 0.01Eu 3+ ,0.01Tb 3+ The luminescent film is then annealed for 1 h at a vacuum deg...

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Abstract

Europium- terbium- co-doped aluminium niobate luminescent materials are provided. The general chemical formula of the materials is MeAl<1-x-y>NbO5:xEu<3+>,yTb<3+>, wherein the MeAl<1-x-y>NbO5 is a matrix, the Eu<3+> and the Bi<3+> are activating elements, the x is 0.01-0.08, the y is 0.01-0.06, and the Me is one of calcium, strontium and barium. In an electroluminescence spectrum (EL) of luminescent film prepared from one of the materials, strong luminescence peaks are obtained at 490 nm and 510 nm. The materials can be used in thin film electroluminescence displays. A preparing method and applications of the europium- terbium- co-doped aluminium niobate luminescent materials are also provided.

Description

【Technical field】 [0001] The invention relates to a europium-terbium co-doped aluminum niobate luminescent material, a preparation method thereof, a europium-terbium co-doped aluminum niobate luminescent film, 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, there is no report on the europium-terbium co-doped aluminum niobate luminescent material that can be applied to thin film electroluminescent displays. 【Content of invention】 [0003] Based on...

Claims

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Application Information

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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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