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Polyacid micro/nano-crystal fluorescent film with crystal orientation and preparation method thereof

A technology of nanocrystals and crystal plane orientation, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as unsatisfactory thickness and quality of luminescent films, difficulty in preparing high-quality luminescent films, and loss of film order. The preparation process and process equipment are simple, the raw materials are easy to obtain, and the cost is non-toxic.

Inactive Publication Date: 2013-08-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since these methods are prepared at the molecular level, the order of the film is often lost due to inevitable defects during the preparation process, and it is difficult to prepare a high-quality luminescent film with a thickness of microns, so it still cannot meet the requirements of luminescence. Actual requirements of film thickness and film quality

Method used

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  • Polyacid micro/nano-crystal fluorescent film with crystal orientation and preparation method thereof
  • Polyacid micro/nano-crystal fluorescent film with crystal orientation and preparation method thereof
  • Polyacid micro/nano-crystal fluorescent film with crystal orientation and preparation method thereof

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Effect test

Embodiment 1

[0019] (1) Preparation of polyacid micro-nano crystals: prepare 0.005mol / L Na 9 wxya 10 o 36 32H 2 20ml of O solution and 20ml of 0.045mol / L silver nitrate solution, under the condition of 75℃ oil bath, slowly add the silver nitrate solution dropwise into the vigorously stirred Na 9 wxya 10 o 36 32H 2 O solution, centrifugal separation, the obtained product is polyacid micro-nano crystal Ag with hexagonal morphology 9 wxya 10 o 36 ;

[0020] (2) Preparation of polyacid micro-nano crystal fluorescent film with crystal plane orientation: first prepare a polyethyleneimine solution with a molecular weight of 1% and a molecular weight of 55000; the prepared polyethyleneimine solution is spin-coated (2000rpm , 1min) to the surface of a clean glass sheet, the area of ​​the glass sheet is 24×24mm 2 , with a thickness of 2mm; then put the polyacid micro-nano crystals prepared in step (1) on the surface of a glass sheet spin-coated with polyethyleneimine, rub and press for 60s...

Embodiment 2

[0023] (1) Preparation of polyacid micro-nano crystals: prepare 0.010mol / L Na 9 wxya 10 o 36 32H 2 O solution 20ml and 0.090mol / L silver nitrate solution 20ml, under the condition of 75°C oil bath, slowly drop the silver nitrate solution (40min) into the vigorously stirred (550rpm) Na 9 wxya 10 o 36 32H 2 O solution, centrifugal separation, the obtained product is polyacid micro-nano crystal Ag with hexagonal morphology 9 wxya 10 o 36 ;

[0024] (2) Preparation of multi-acid micro-nano crystal fluorescent film with crystal plane orientation: first prepare a polyethyleneimine solution with a molecular weight of 2% and a molecular weight of 55000; spin-coat 1ml of the prepared polyethyleneimine solution ( 2500rpm, 1min) to ITO glass (18×18mm 2 ) surface; then put the multi-acid micro-nano crystals prepared in step (1) on the ITO glass surface spin-coated with polyethyleneimine, and rub and press for 40s to prepare poly-acid micro-nano crystals with crystal plane orient...

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Abstract

The invention discloses a polyacid micro / nano-crystal fluorescent film with crystal orientation and a preparation method thereof and belongs to the technical field of light-emitting film preparation. The method disclosed by the invention comprises the following steps: firstly, reacting polyacid Na9EuW10O36.nH2O with large-diameter univalent counter cations Ag+ to generate polyacid insoluble salt Ag9EuW10O36 micro / nano crystals with extremely-low solubility, wherein the micro / nano crystals have the characteristics of uniform size and hexagonal shape, clear internal structure, extremely low solubility, high fluorescence life, high light-emitting efficiency, high quantum yield, and the like; and then, with the obtained polyacid micro / nano-crystals as basic modules, and rubbing and pressing a solid base coated with polyelectrolyte, so that the micro / nano-crystals are finally assembled into a rare-earth polyacid micro / nano-crystal fluorescent film with crystal orientation and a certain thickness on the solid base coated with polyelectrolyte. According to the preparation method, the orderly assembling of rare-earth polyacid micro / nano-crystals is realized for the firs time.

Description

technical field [0001] The invention belongs to the technical field of luminescent film preparation, in particular to a multi-acid micro-nano crystal fluorescent film with crystal plane orientation and a preparation method thereof. Background technique [0002] Rare earth polyoxometalates have practical or potential applications in the fields of catalysis, biology, electrodes, medicine, and luminescent material science. Among them, the molecular formula is Na 9 wxya 10 o 36 ·nH 2 The polyacid of O is currently known as the polyacid with the highest fluorescence quantum yield and the longest fluorescence lifetime with a sharp linear emission spectrum. It is important in cathode ray tubes, photoluminescence, electroluminescence and field emission display devices potential application value. But since Na 9 wxya 10 o 36 ·nH 2 O has a large number of crystallization solvent water molecules, and is easily soluble in water, so it is not suitable for direct preparation of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 周云山张锐张立娟
Owner BEIJING UNIV OF CHEM TECH
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