Oxide up-conversion light-emitting material of perovskite structure and preparation method thereof

A technology of perovskite structure and luminescent materials, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., to achieve the effects of controllable size, easy synthesis, and high up-conversion luminous intensity

Inactive Publication Date: 2013-10-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the research, so far there is no report on the preparation of up-conversion luminescent materials using such oxides as hosts.

Method used

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  • Oxide up-conversion light-emitting material of perovskite structure and preparation method thereof
  • Oxide up-conversion light-emitting material of perovskite structure and preparation method thereof
  • Oxide up-conversion light-emitting material of perovskite structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like figure 1 As shown, the up-conversion luminescent material Na was prepared by solid-state reaction method 0.5 La 0.4 Er 0.1 TiO 3 .

[0048] Raw material selection Na 2 CO 3 , La 2 o 3 、Er 2 o 3 and TiO 2 , press Na 0.5 La 0.4 Er 0.1 TiO 3 The stoichiometric ratio of Na, La, Er and Ti elements in the formula takes the selected raw materials, mixes them, adds absolute ethanol, grinds them in a mortar and mixes them well to get powder X 1 , wherein the mass ratio of absolute ethanol to the raw material mixture is 3:1. Powder X 1 Pre-fired in an alumina crucible, the pre-fired temperature is 1000°C, the heating rate is 3°C / min, keep warm for 2 hours and cool naturally to get the pre-fired powder X 2 . The pre-fired powder X 2 After grinding, it was calcined at 1200°C for 4 hours, the heating rate was 3°C / min, and after natural cooling, it was ground to obtain powder X 3 , the powder X 3 The up-conversion luminescent powder material Na obtained in t...

Embodiment 2

[0051] like figure 2 As shown, the solvothermal method was used to prepare Na 0.5 La 0.4 Er 0.1 TiO 3 Preparation of up-conversion luminescent materials.

[0052] The raw materials are NaOH, La(NO 3 ) 3 ·6H 2 O, Er(NO 3 ) 3 ·6H 2 O and C 16 h 36 o 4 Ti (tetrabutyl titanate), according to Na 0.5 La 0.4 Er 0.1 TiO 3 The stoichiometric ratios of La, Er and Ti elements are respectively selected as raw materials: La(NO 3 ) 3 ·6H 2 O: 1.73g, Er(NO 3 ) 3 ·6H 2 O: 0.46g, C 16 h 36 o 4 Ti: 3.40g, add the above raw materials into 40ml of deionized water, stir magnetically for 0.5h until they are uniformly dissolved, then add an appropriate amount of NaOH to it, add 4g of NaOH according to the molar ratio of Na:Ti=10:1, and then magnetically stir Or after ultrasonic vibration for 0.5h~1h, finally fill it into a stainless steel reactor with a polytetrafluoroethylene liner, the filling amount accounts for 3 / 5~4 / 5 of the volume of the polytetrafluoroethylene liner,...

Embodiment 3

[0055] like image 3 As shown, using sol-gel to prepare Na 0.5 La 0.4 Er 0.1 TiO 3 Preparation of up-conversion luminescent materials.

[0056] Raw material selection NaNO 3 , La(NO 3 ) 3 ·6H 2 O, Er(NO 3 ) 3 ·6H 2 O and C 16 h 36 o 4 Ti (tetrabutyl titanate), according to Na 0.5 La 0.4 Er 0.1 TiO 3 The stoichiometric ratio of Na, La, Er and Ti elements will be 0.43g of NaNO 3 Dissolved in 10ml of deionized water, 1.73g of La(NO 3 ) 3 ·6H 2 O and 0.46g of Er(NO 3 ) 3 ·6H 2 O dissolved in 20ml of acetic acid, 3.40gC 16 h 36 o 4 Ti was mixed in 20ml of absolute ethanol, and stirred to obtain three homogeneous solutions, then, the three homogeneous solutions were mixed, and a transparent sol system was formed after magnetic stirring or ultrasonic oscillation for 3 hours, and the obtained transparent sol system was heated at room temperature for 20 The wet gel was obtained after standing at ~25°C for 12 hours, and the dry gel powder was obtained after dr...

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Abstract

The invention relates to a novel infrared light-excited oxide up-conversion light-emitting material of a perovskite structure and preparation thereof, and belongs to the field of photoelectric functional materials. The up-conversion light-emitting functional material has a chemical general formula of AxR[(2-x) / 3]-y-zMyYbzTiO3, wherein A is selected from one or more ions of alkaline metal elements Li<+>, Na<+> and K<+>; R is selected from one or more ions of rare earth elements; M is selected from one or more ions of Er<3+>, Ho<3+> and Tm<3+>; x is greater than 0 and is less than or equal to 0.5; y is greater than or equal to 0.00001 and is less than or equal to 0.15; and z is greater than or equal to 0 and is less than or equal to 0.344444. The up-conversion light-emitting material has the perovskite structure, has the advantages of high physical and chemical stability, low cost, easiness in synthesis, high luminous intensity, controllable size and adjustable color, and can be widely applied to the fields of bio-molecular fluorescence labeling, lasers, three-dimensional display, infrared detection, anti-counterfeit technology, solar cells and the like.

Description

technical field [0001] The invention relates to a novel perovskite structure oxide up-conversion light-emitting functional material excited by infrared light and a preparation method thereof, belonging to the field of photoelectric functional materials. Background technique [0002] Up-conversion luminescent materials are materials that can emit visible light when excited by infrared lasers. They have broad application prospects in anti-counterfeiting, infrared detection, three-dimensional display, short-wavelength all-solid-state lasers, biomarkers, and solar cells. The host materials for up-conversion luminescence mainly include fluoride, chloride, oxide and so on. At present, the most commercially available up-conversion luminescent materials are mainly made of fluoride matrix doped with rare earth elements, such as NaYF 4 Rare earth elements such as Er, Ho, Tm, and Yb are doped in the matrix, which is mainly because the luminescent rare earth ions can be easily doped in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 王旭升彭登峰孙海勤李艳霞唐棉棉
Owner TONGJI UNIV
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