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Material capable of emitting near-infrared light by virtue of conversion of ultraviolet light as well as preparation method and application thereof

A near-infrared light and ultraviolet light technology, applied in luminescent materials, photovoltaic power generation, chemical instruments and methods, etc., can solve problems such as unreported, achieve the effect of easy product, improve photoelectric conversion efficiency, and strong absorption

Active Publication Date: 2015-07-22
徐州博创建设发展集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the Yb prepared by the present invention 3+ doped molybdate La 7-7x Yb 7x Mo 7 o 30 (0.0001≤ x ≤0.4) luminescent material, studies have shown that it can also realize ultraviolet light conversion and emit near-infrared light, which is used to improve the photoelectric conversion efficiency of the battery, and is used as a photoconversion material for silicon-based solar cells. So far, the preparation method and application of this material have not been see the report

Method used

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  • Material capable of emitting near-infrared light by virtue of conversion of ultraviolet light as well as preparation method and application thereof
  • Material capable of emitting near-infrared light by virtue of conversion of ultraviolet light as well as preparation method and application thereof
  • Material capable of emitting near-infrared light by virtue of conversion of ultraviolet light as well as preparation method and application thereof

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Effect test

Embodiment 1

[0044] Embodiment 1: adopt high-temperature solid phase method to prepare La 6.9993 Yb 0.0007 Mo 7 o 30 , That is, mix various oxides or carbonates as raw materials according to the target composition stoichiometric ratio, and then synthesize them in an air atmosphere under normal pressure.

[0045] First, according to the chemical formula La 6.9993 Yb 0.0007 Mo 7 o 30 The stoichiometric ratio of each element in , respectively weigh lanthanum oxide La 2 o 3 : 2.28 g, ytterbium oxide Yb 2 o 3 : 0.00028 g, molybdenum oxide MoO 3 : 2.02 grams, ground in an agate mortar and mixed evenly, select the air atmosphere for the first calcining, the temperature is 300 ℃, the calcining time is 3 hours, cool to room temperature, take out the sample. Then, the samples from the previous step were fully ground and mixed again, and calcined in an air atmosphere at a temperature of 500°C for 4 hours, cooled to room temperature, and the samples were taken out. Finally, after fully gri...

Embodiment 2

[0050] Example 2: The high-temperature solid-phase method is also used to prepare the material La that can realize the conversion of ultraviolet light and emit near-infrared light 6.93 Yb 0.07 Mo 7 o 30 .

[0051] First, according to the chemical formula La 6.93 Yb 0.07 Mo 7 o 30 The stoichiometric ratio of each element in, respectively weighed lanthanum carbonate La 2 (CO 3 ) 3 ·8H 2 O: 3.18 g, ytterbium oxide Yb 2 o 3 : 0.028 g, molybdenum oxide MoO 3 : 2.02 grams, ground in an agate mortar and mixed evenly, select the air atmosphere for the first calcining, the temperature is 350 ℃, the calcining time is 5 hours, then cool to room temperature, take out the sample. The above samples were thoroughly ground and mixed evenly again, and calcined in an air atmosphere at a calcining temperature of 600°C for 12 hours, cooled to room temperature, and the samples were taken out. Finally, the sample from the previous step is fully ground and calcined in the air in a muff...

Embodiment 3

[0053] Embodiment 3: adopt high-temperature solid phase method to prepare La 6.65 Yb 0.35 Mo 7 o 30 .

[0054] First, according to the chemical formula La 6.65 Yb 0.35 Mo 7 o 30 The stoichiometric ratio of each element in , respectively weighed lanthanum hydroxide La(OH) 3 : 2.57 g, ytterbium oxide Yb 2 o 3 : 0.14 g, molybdenum oxide MoO 3 : 2.02 grams, ground in an agate mortar and mixed evenly, select the air atmosphere for the first calcination, the temperature is 400 ℃, the calcination time is 6 hours, then cool to room temperature, take out the sample. Thoroughly grind and mix again, calcined in air atmosphere, the calcined temperature is 550°C, the calcined time is 10 hours, cooled to room temperature, and the sample is taken out. Finally, it is fully ground and calcined in the air in a muffle furnace. The calcination temperature is 850°C, and the calcination time is 12 hours. After cooling to room temperature, it is taken out and fully ground to obtain La 6....

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Abstract

The invention discloses a material capable of emitting near-infrared light by virtue of conversion of ultraviolet light as well as a preparation method and application thereof. The chemical formula of the material is La<7-7x>Yb7Mo7O30, wherein x is a doping mole percentage of Yb<3+>, x is more than or equal to 0.0001 and less than or equal to 0.4, and under the active excitation of ultraviolet light of 250nm to 400nm, the material can emit the near-infrared light of 900nm to 1100nm; the material can be prepared in a high-temperature solid-phase method, a sol-gel method and a co-precipitation method and has the advantages of broad excitation from ultraviolet to visible light, strong near-infrared light emitting and the like, and the spectrum mismatching problem between sunlight and a solar battery can be effectively solved, so that the photoelectric conversion efficiency and performance stability of the battery can be improved, and the material not only can be used as an optical conversion material for a silicon-base solar battery, but also can be applied to the analysis and determination fields of products in various industries such as food, medicine and petrochemical engineering.

Description

technical field [0001] The invention relates to a luminescent material, in particular to a material capable of converting ultraviolet light into near-infrared light and its preparation method and application, belonging to the field of luminescent materials in luminescence physics. Background technique [0002] Energy is an important material basis for the survival and development of human society. Throughout the history of human society development, the improvement and replacement of energy has promoted the major progress of human civilization and greatly promoted the development of the world economy and human society. However, energy shortages More and more restricting the sustainable development of the future society, environmental pollution has had a negative impact. Therefore, governments of various countries are paying more and more attention to energy and environmental issues, and it is imperative to develop renewable energy technologies. Among various renewable energ...

Claims

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Application Information

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IPC IPC(8): C09K11/78H01L31/055
CPCY02E10/52
Inventor 乔学斌
Owner 徐州博创建设发展集团有限公司
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