Cerium-terbium co-doped strontium titanate light-emitting film and preparation method thereof as well as organic electroluminescence device

A light-emitting thin film and co-doping technology, which is applied in the direction of electroluminescence light source, electric solid-state device, electric component, etc.

Active Publication Date: 2013-02-06
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of electroluminescent thin films with titanate branchial luminescent materials is still rarely reported.

Method used

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  • Cerium-terbium co-doped strontium titanate light-emitting film and preparation method thereof as well as organic electroluminescence device
  • Cerium-terbium co-doped strontium titanate light-emitting film and preparation method thereof as well as organic electroluminescence device
  • Cerium-terbium co-doped strontium titanate light-emitting film and preparation method thereof as well as organic electroluminescence device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] Step S1, preparation of ceramic target material: according to the general chemical formula Sr 1-x-y TiO 3 :xCe 3+ , yTb 3+ Stoichiometric ratio of each element in SrO, TiO 2 、Ce 2 o 3 and Tb 4 o 7 The powder is uniformly mixed, sintered at 900-1300°C (preferably 1250°C), and cooled naturally to obtain a target sample, which is cut into a target with a diameter of 50mm and a thickness of 2mm; where x The value range is 0.0001-0.033, the value range of y is 0.0001-0.039, the preferred value of x is 0.009, and the preferred value of y is 0.012;

[0019] Step S2, put the target and substrate in step S1 into the vacuum chamber of the magnetron sputtering coating equipment, and use a mechanical pump and a molecular pump to pump the vacuum of the chamber to 1.0×10 -3 Pa~1.0×10 -5 Pa, preferably 5.0×10 -4 Pa;

[0020] Step S3, adjusting the magnetron sputtering coating process parameters as follows: the base-target distance is 45-90mm, preferably 60mm; the substrate ...

Embodiment 1

[0027] 1. Select SrO and TiO with a purity of 99.99% respectively 2 、Ce 2 o 3 and Tb 4 o 7 Powder, according to mass percentage: SrO~57%, Ce 2 o 3 ~0.8%, Tb 4 o 7 ~1.2% and TiO 2 ~41%, weighing SrO, TiO 2 、Ce 2 o 3 and Tb 4 o 7 The mass numbers of the powders are 57g, 0.8g, 1.2g, and 41g respectively; these powders are uniformly mixed, sintered at 1250°C, and cooled naturally to obtain target samples, which are cut into diameters of 50mm and thicknesses of 2mm target;

[0028] 2. Put the target into the vacuum chamber of the magnetron sputtering coating equipment;

[0029] 3. Clean the glass ultrasonically with acetone, absolute ethanol and deionized water successively, and perform oxygen plasma treatment on it, and then put it into the vacuum chamber of the magnetron sputtering coating equipment; among them, the distance between the target and the glass Set to 60mm;

[0030] 4. Use a mechanical pump and a molecular pump to pump the vacuum of the vacuum chamber...

Embodiment 2

[0034] 1. Select SrO and TiO with a purity of 99.99% respectively 2 、Ce 2 o 3 and Tb 4 o 7 Powder, according to the mass percentage SrO ~ 45%, Ce 2 o 3 ~0.01%, Tb 4 o 7 ~4% and TiO 2 ~50.99%, weighed SrO, TiO 2 、Ce 2 o 3 and Tb 4 o 7 The mass numbers of the powders are 45g, 0.01g, 4g, and 50.99g respectively; these powders are uniformly mixed, sintered at 900°C, and cooled naturally to obtain target samples, which are cut into diameters of 50mm and thicknesses of 2mm target;

[0035] 2. Put the target into the vacuum chamber of the magnetron sputtering coating equipment;

[0036] 3. Clean the glass ultrasonically with acetone, absolute ethanol and deionized water successively, and perform oxygen plasma treatment on it, and then put it into the vacuum chamber of the magnetron sputtering coating equipment; among them, the distance between the target and the glass Set to 45mm;

[0037] 4. Use a mechanical pump and a molecular pump to pump the vacuum of the vacuum ...

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Abstract

The invention belongs to the field of photoelectric light-emitting films, and discloses a cerium-terbium co-doped strontium titanate light-emitting film and a preparation method thereof as well as an organic electroluminescence device. A chemical general formula of the light-emitting film is Sr1-x-yTiO3:xCe<3+>, yTb<3+>, wherein Sr1-x-yTiO3 is a matrix, Ce<3+> and Tb<3+> are doping elements; x ranges from 0.0001-0.033, and y ranges from 0.0001-0.039. According to the invention, the cerium-terbium co-doped strontium titanate light-emitting film is prepared by a magnetron spluttering device, has strong light-emitting peaks in wavelength regions of 490 nm and 510 nm, and is a development material of the electroluminescence device.

Description

technical field [0001] The invention relates to the field of photoelectric luminescent films, in particular to a cerium and terbium co-doped strontium titanate luminescent film and a preparation method thereof. The invention also relates to an organic electroluminescent device using the cerium-terbium co-doped strontium titanate luminescent thin film as a luminescent layer. Background technique [0002] Compared with the display screen made of traditional luminescent powder, the luminescent film shows strong advantages in terms of contrast, resolution, heat conduction, uniformity, adhesion to the substrate, and outgassing rate. Therefore, as a functional material, luminescent thin films have broad application prospects in the field of electroluminescent devices (TFELD) flat panel displays. [0003] Titanate gills are widely used as substrates for growing high-temperature superconducting thin films, and have good lattice matching with silicon, the basic material of large-sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B23/00C23C14/08C23C14/35H05B33/14H05B33/10H01L51/54H01L51/56
Inventor 周明杰王平陈吉星黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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