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A material and preparation method for realizing near-infrared luminescence under ultraviolet light excitation

A near-infrared and ultraviolet light technology, used in luminescent materials, chemical instruments and methods, etc., can solve the problems of complex preparation methods of down-conversion luminescent materials, insufficient utilization, and low absorption intensity, so as to improve the light conversion efficiency. , No pollution, pure effect

Active Publication Date: 2017-02-22
徐州博创建设发展集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these co-doped ions have absorption in the ultraviolet to visible light region, their absorption is mostly linear, the intensity of absorption is small, and the effect of full utilization cannot be achieved, and the existing preparation methods for down-conversion luminescent materials are also relatively weak. complex and expensive

Method used

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  • A material and preparation method for realizing near-infrared luminescence under ultraviolet light excitation
  • A material and preparation method for realizing near-infrared luminescence under ultraviolet light excitation
  • A material and preparation method for realizing near-infrared luminescence under ultraviolet light excitation

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Preparation of CdY 2 Yb 2 Mo 3 o 16 , according to the chemical formula CdY 2 Yb 2 Mo 3 o 16 The stoichiometric ratio of each element in , respectively weighed cadmium oxide CdO: 0.32 grams, yttrium oxide Y 2 o 3 : 0.56 g, ytterbium oxide Yb 2 o 3 : 0.99 g, molybdenum oxide MoO 3 : 1.08g, ground in an agate mortar and mixed evenly, pre-calcined in an air atmosphere at 450°C for 14 hours in a muffle furnace; Calcined at 1150°C for 2 hours, cooled to room temperature, taken out and fully ground to obtain powdery material.

[0042] See attached figure 1 , which is the X-ray powder diffraction pattern of the sample prepared by the technical scheme of this embodiment. The XRD test results show that there are no other miscellaneous peaks in the figure. Compared with the standard card ICSD-35093, the position and relative intensity of the diffraction peaks are the same as those of the standard card It is completely consistent, indicating that the sample prepared i...

Embodiment 2

[0048] Preparation of CdY 3.6 Yb 0.4 Mo 3 o 16 , according to the chemical formula CdY 3.6 Yb 0.4 Mo 3 o 16 The stoichiometric ratio of each element in , respectively weighed cadmium chloride CdCl 2 : 0.46 g, yttrium carbonate Y 2 (CO 3 ) 3 : 1.38 g, ytterbium carbonate Yb 2 (CO 3 ) 3 : 0.26 g, ammonium molybdate (NH 4 ) 6 m O7 o 24 4H 2 O: 1.32 g, ground and mixed in an agate mortar, pre-calcined in an air atmosphere at 850°C for 2 hours in a muffle furnace; Calcined at 950°C for 9 hours, cooled to room temperature, taken out and fully ground to obtain powdery material.

[0049] Its main structure, excitation spectrum, emission spectrum and decay curve are similar to Example 1.

Embodiment 3

[0051] Preparation of CdY 1.2 Yb 2.8 Mo 3 o 16 , according to the chemical formula CdY 0.8 Yb 3.2 Mo 3 o 16 The stoichiometric ratios of the elements in the 3 ) 2 4H 2 O: 0.31 g, yttrium nitrate Y (NO 3 ) 3 ·6H 2 O: 0.46 g, ytterbium nitrate Yb (NO 3 ) 3 ·5H 2 O: 1.26 g, ammonium molybdate (NH 4 ) 6 m O7 o 24 4H 2 O: 0.53 g, ground and mixed in an agate mortar, pre-calcined in an air atmosphere at 650 ° C for 7 hours in a muffle furnace; Calcined at 950°C for 9 hours, cooled to room temperature, taken out and fully ground to obtain powdery material.

[0052] Its main structure, excitation spectrum, emission spectrum and decay curve are similar to Example 1.

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Abstract

The invention relates to a material capable of realizing near-infrared luminescence under the ultraviolet excitation and a preparation method thereof. The material has a chemical formula of MY4-4xYb4xMo3O16, wherein M is divalent transition metal ion cadmium (Cd<2+>) or divalent transition metal ion zinc (Zn<2+>), and x is doping mole percent of Yb<3+> and is not less than 0.0001 and not more than 0.8. The material disclosed by the invention is stable in property; MY4Mo3O16 is used as a substrate by which energy is transferred to active ion Yb<3+> through ultraviolet-near ultraviolet broadband absorption; therefore, the broadband absorption of the excitation spectra of the material in ultraviolet and visible light zones is realized and the material can be excited by the ultraviolet-near ultraviolet light effectively to emit 950-1100 nanometer near-infrared light which is matched with the absorption spectrum of a silicon-based solar battery; the light conversion efficiency of the silicon-based solar battery can be improved and therefore the material is a perfect light conversion material for the silicon-based solar battery. The preparation process is simple and easy to carry out and has low requirements on equipment; the prepared product is pure in phase and uniform in particle size distribution; the production cost is low; industrial production is facilitated; no special protection is needed in the preparation process; and the effects of environmental friendliness and no pollution are achieved.

Description

technical field [0001] The invention relates to a preparation method and application of a luminescent material, in particular to a material and a preparation method for realizing near-infrared luminescence under the excitation of ultraviolet light, which belong to the technical field of luminescent materials. Background technique [0002] Since the 21st century, energy shortage and environmental pollution have increasingly restricted the sustainable development of the future society. For this reason, human beings urgently need to develop and apply new energy sources. Renewable energy technologies such as solar energy represent the development direction of clean energy, which has attracted worldwide attention It is widely concerned by various countries and will become an important part of the basic energy in the future. [0003] A solar cell is a device that uses the photovoltaic effect to directly convert sunlight energy into electrical energy. According to different materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 乔学斌
Owner 徐州博创建设发展集团有限公司
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