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Europium-doped calcium silicate luminescent material and preparation method and application thereof

A technology of calcium aluminosilicate and luminescent materials, applied in luminescent materials, electroluminescent light sources, chemical instruments and methods, etc.

Active Publication Date: 2013-01-09
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But, the europium-doped calcium aluminosilicate luminescent material that can be applied to thin film electroluminescence display has not yet been reported.

Method used

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  • Europium-doped calcium silicate luminescent material and preparation method and application thereof
  • Europium-doped calcium silicate luminescent material and preparation method and application thereof
  • Europium-doped calcium silicate luminescent material and preparation method and application thereof

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preparation example Construction

[0022] The preparation method of the above-mentioned europium-doped calcium aluminosilicate luminescent material comprises the following steps:

[0023] Step S11, according to CaAl 2 Si 2 o 8 :xEu 3+ The stoichiometric ratio of each element weighs CaO, Al 2 o 3 , SiO 2 and Eu 2 o 3 Powder, where 0.0005≤x≤0.09.

[0024] In this step, preferably, x is 0.0045.

[0025] It can be understood that CaO, Al can also be weighed in this step 2 o 3 , SiO 2 and Eu 2 o 3 Powder and mixed evenly, the mass percentage of CaO is 20%~30%, Al 2 o 3 The mass percentage of Eu is 28%~43%, Eu 2 o 3 The mass percentage content is 0.01 ~ 2%, and the balance is SiO 2 . Preferably, the mass percentage of CaO is 24%, Al 2 o 3 The mass percentage content is 32%, Eu 2 o 3 The mass percentage content is 0.5%.

[0026] Step S12, sintering the mixed powder at 900° C. to 1300° C. for 0.5 hours to 5 hours to obtain the target product.

[0027] In this step, it is preferable to sinter at...

Embodiment 1

[0044] Selecting the powder with a purity of 99.99%, the CaO with a mass percentage of 24%, and the Al with a mass percentage of 32% 2 o 3 , the mass percentage is 0.5% Eu 2 o 3 and SiO with a mass percentage of 43.5% 2 , after uniform mixing, sintering at 1250° C. for 3 hours to form a ceramic target with a diameter of 50 mm and a thickness of 2 mm, and the target was loaded into a vacuum chamber. Then, the glass substrate with indium tin oxide (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 argon is 25 sccm, the pressure is adjusted to 2.0 Pa, and the substrate temperature is 500°C. The obtained samples were annealed in a 0.01 Pa vacuum furnace for 2 h at a temperature of 600 ...

Embodiment 2

[0049] Select the powder with a purity of 99.99%, and the mass percentage is 20% CaO, and the mass percentage is 43% Al 2 o 3 , with a mass percentage of 0.01% Eu 2 o 3 and SiO with a mass percentage of 36.99% 2 , after uniform mixing, sintering at 900°C to form a ceramic target with a diameter of 50mm and a thickness of 2mm, and put the target into 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 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 argon is 10 sccm, the pressure is adjusted to 0.2 Pa, and the substrate temperature is 250°C. The obtained samples were annealed in a 0.01 Pa vacuum furnace for 1 h at an annealing temperature of 500 °C. Then a layer of Ag is vapor-...

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Abstract

A chemical formula of a europium-doped calcium silicate luminescent material is CaAl2Si2O8:xEu3+, wherein 0.0005<=x<=0.09. In an electroluminescence spectrum (EL) of an illuminant film made of the europium-doped calcium silicate luminescent material, strong luminescent peaks exist in wavelength areas of 590 nm and 620 nm, and good excitation of green light and blue light can be obtained. The invention further provides a preparation method of the europium-doped calcium silicate luminescent material, a europium-doped calcium silicate luminescent film, a preparation method of the europium-doped calcium silicate luminescent film and a film electroluminescence device.

Description

【Technical field】 [0001] The invention relates to a europium-doped calcium aluminosilicate light-emitting material, a preparation method thereof, a europium-doped calcium aluminosilicate light-emitting film, a preparation method thereof and a thin-film electroluminescent device. 【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. [0003] In the research of LED phosphors, rare earth-doped aluminosilicate phosphors, whose excitation spectrum can better match the emission spectrum of existing near-ultraviolet LEDs, can obtain good excitation from green light to bl...

Claims

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Application Information

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IPC IPC(8): C09K11/64H05B33/20
Inventor 周明杰王平陈吉星黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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