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Erbium-ytterbium co-doped tungstate upconversion luminescent material, preparation method and application of material

A luminescent material and co-doping technology, applied in the field of luminescent materials in luminescence physics, to achieve the effects of stable luminescence performance, environmental friendliness and low cost

Inactive Publication Date: 2015-03-25
安徽长正升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, the tungstate material Ca 0.5 La 3 (WO 4 ) 5 by Er 3+ and Yb 3+ Materials that can be doped to achieve upconversion fluorescence have not been reported yet

Method used

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  • Erbium-ytterbium co-doped tungstate upconversion luminescent material, preparation method and application of material
  • Erbium-ytterbium co-doped tungstate upconversion luminescent material, preparation method and application of material
  • Erbium-ytterbium co-doped tungstate upconversion luminescent material, preparation method and application of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of Ca 0.5 La 2.7 Yb 0.2 Er 0.1 (WO 4 ) 5

[0035] According to the chemical formula Ca 0.5 La 2.7 Yb 0.2 Er 0.1 (WO 4 ) 5 The stoichiometric ratio of each element in is weighed separately: ytterbium oxide Yb 2 o 3 : 0.063 g, erbium oxide Er 2 o 3 : 0.031 g, calcium carbonate CaCO 3 : 0.08 g, tungsten oxide WO 3 : 1.86 g, lanthanum oxide La 2 o 3 : 0.71 g.

[0036] After grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first sintering, the sintering temperature is 550 ° C, and the sintering time is 7 hours, then cool to room temperature, take out the sample, repeat the sintering operation, and perform the second sintering.

[0037] After the second sintering, the mixture was thoroughly mixed and ground again, and the third calcination was carried out in an air atmosphere at 750 °C for 9 hours, cooled to room temperature, and the samples were taken out. Then fully mix the mixture again and grind it evenl...

Embodiment 2

[0041] Preparation of Ca 0.5 La 2 Yb 0.7 Er 0.3 (WO 4 ) 5

[0042] According to the chemical formula Ca 0.5 La 2 Yb 0.7 Er 0.3 (WO 4 ) 5 The stoichiometric ratio of each element in is weighed separately: ytterbium oxide Yb 2 o 3 : 0.22 g, erbium oxide Er 2 o 3 : 0.092 g, Calcium Carbonate CaCO 3 : 0.08 g, tungsten oxide WO 3 : 1.86 g, lanthanum oxide La 2 o 3 : 0.52 g.

[0043] After grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first sintering, the sintering temperature is 350 ℃, and the sintering time is 5 hours, then cool to room temperature, and take out the sample. The mixture was fully mixed and ground evenly again, and the second calcination was carried out at 800°C in an air atmosphere for 10 hours, cooled to room temperature, and the sample was taken out. Then fully mix the mixture again and grind it evenly. In the air atmosphere, it is calcined for the third time at 1000°C. The calcining time is 13 hours. Th...

Embodiment 3

[0046] Preparation of Ca 0.5 wxya 1.5 Er 0.5 (WO 4 ) 5

[0047] According to the chemical formula Ca 0.5 wxya 1.5 Er 0.5 (WO 4 ) 5 The stoichiometric ratio of each element in is weighed separately: ytterbium oxide Yb 2 o 3 : 0.98 g, erbium oxide Er 2 o 3 : 0.32 g, Calcium Carbonate CaCO 3 : 0.08 g, tungsten oxide WO 3 : 1.86 g, lanthanum oxide La 2 o 3 : 0.54 g.

[0048] After grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first sintering, the sintering temperature is 250 °C, the sintering time is 4 hours, then cool to room temperature, take out the sample and grind it evenly, repeat the sintering operation for the second time sintering.

[0049] Cool to room temperature, mix and grind the mixture thoroughly again, and perform the third calcination in air atmosphere at 880°C for 5 hours, cool to room temperature, and take out the sample. Mix the mixture thoroughly again and grind it evenly. In the air atmosphere, carry ou...

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Abstract

The invention discloses an erbium-ytterbium co-doped tungstate upconversion luminescent material, a preparation method and an application of the material, and belongs to the technical field of fluorescent materials. The general formula of the upconversion luminescent material is as follows: Ca0.5La3-3(xy)(WO4)5:3xEr<3+>,3yYb<3+>, wherein x is Er<3+> doped mole percentage; y is Yb<3+> doped mole percentage; x+y is greater than or equal to 0.001 and less than 1.0; Yb<3+> serves as a sensitizer; Er<3+> serves as an active ion; and the upconversion luminescent material is excited by 975 nano infrared laser, has a luminescent peak at 480-570 nanometers, and can serve as a blue light luminescent material. The erbium-ytterbium co-doped tungstate upconversion luminescent material is stable in luminescence, and can be applied to the fields of infrared detection, solar cells, stereoscopic display and the like, and the luminescent intensity of the material is increased with the increasing of the energy intensity of an excitation diode.

Description

technical field [0001] The invention relates to a luminescent material, a preparation method and an application thereof, in particular to an erbium-ytterbium co-doped tungstate up-conversion luminescent material, a preparation method and an application thereof, and belongs to the technical field of luminescent materials in luminescence physics. Background technique [0002] Upconversion luminescence refers to the phenomenon of converting two or more low-energy photons into one high-energy photon. Generally, rare earth ion-doped up-conversion luminescent materials use the metastable energy level characteristics of rare earth elements to convert infrared light invisible to human eyes into visible light by absorbing multiple low-energy long-wave radiations. In addition, the up-conversion material can effectively reduce the degradation of the matrix material caused by photoionization, does not require strict phase matching, does not require high stability of the excitation wavel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 黄彦林关莹秦琳陶正旭袁蓓玲韦之豪
Owner 安徽长正升科技有限公司
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