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Manganese-chromium-doped zinc tungstate luminescent material and preparation method and application thereof

A luminescent material, co-doping technology, 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

However, manganese-chromium co-doped zinc tungstate luminescent materials that can be applied to thin film electroluminescent displays have not been reported yet.

Method used

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  • Manganese-chromium-doped zinc tungstate luminescent material and preparation method and application thereof
  • Manganese-chromium-doped zinc tungstate luminescent material and preparation method and application thereof
  • Manganese-chromium-doped zinc tungstate luminescent material and preparation method and application thereof

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preparation example Construction

[0021] The preparation method of the above-mentioned manganese-chromium co-doped zinc tungstate luminescent material comprises the following steps:

[0022] Step S11, according to ZnWO 4 :xMn 4+ , yCr 3+ The stoichiometric ratio of each element weighs ZnO, WO 3 , MnO 2 and Cr 2 o 3 Powder, where 0.003≤x≤0.145, 0.003≤y≤0.066.

[0023] In this step, preferably, x is 0.015, and y is 0.016.

[0024] It can be understood that ZnO, WO can also be weighed in this step 3 , MnO 2 and Cr 2 o 3 Powder and mixed evenly, the mass percentage of ZnO is 25%~35%, MnO 2 The mass percentage content is 0.1% to 5%, Cr 2 o 3 The mass percentage content is 0.1 ~ 2%, the balance is WO 3 . Preferably, the mass percentage of ZnO is 32%, MnO 2 The mass percentage content is 0.5%, Cr 2 o 3 The mass percentage content is 0.5%.

[0025] Step S12, sintering the mixed powder at 900°C-1300°C for 0.5-5 hours to obtain the target product.

[0026] In this step, it is preferable to sinter at ...

Embodiment 1

[0043] Select the powder with a purity of 99.99%, the ZnO with a mass percentage of 32%, the MnO with a mass percentage of 0.5% 2 , with a mass percentage of 0.5% Cr 2 o 3 and WO with a mass percentage of 67.45% 3 , 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 °C. Th...

Embodiment 2

[0048] Selecting the powder with a purity of 99.99%, the ZnO with a mass percentage of 25%, and the MnO with a mass percentage of 0.1% 2 , with a mass percentage of 2% Cr 2 o 3 and WO with a mass percentage of 72.99% 3 , after uniform mixing, sintering at 900°C for 5 hours to make 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 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 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 laye...

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Abstract

A chemical formula of a manganese-chromium-doped zinc tungstate luminescent material is ZnWO4:xMn4+, yCr3+ wherein 0.003<=x<=0.145, and 0.003<=y<=0.066. In an electroluminescence spectrum (EL) of a luminescent film made of the manganese-chromium-doped zinc tungstate luminescent material, strong luminescent peaks exist in wavelength areas of 607 nm and 629 nm, and good excitation of green light and blue light can be obtained. The invention further provides a preparation method of the manganese-chromium-doped zinc tungstate luminescent material, a manganese-chromium-doped zinc tungstate luminescent film, a preparation method of the manganese-chromium-doped zinc tungstate luminescent film and a film electroluminescence device.

Description

【Technical field】 [0001] The invention relates to a manganese-chromium co-doped zinc tungstate luminescent material, a preparation method thereof, a manganese-chromium co-doped zinc tungstate luminescent 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. However, manganese-chromium co-doped zinc tungstate luminescent materials that can be applied to thin film electroluminescent displays have not been reported yet. 【Content of invention】 [0003] Based on this, it is necessary to pr...

Claims

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Application Information

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IPC IPC(8): C09K11/68H05B33/14
Inventor 周明杰王平陈吉星黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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