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A near-infrared fluorescent emission material excited by broadband ultraviolet-visible light and its preparation method and application

A fluorescent emission and visible light technology, which is applied in luminescent materials, photovoltaic power generation, chemical instruments and methods, etc., can solve the problems of not being able to use sunlight at a high level and limit the improvement of solar cell efficiency, and achieve high yield and easy long-term The effect of simple preservation and preparation process

Inactive Publication Date: 2014-10-29
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The limitations of these existing near-infrared light conversion materials lead to their inability to utilize sunlight at a high level, which limits the improvement of solar cell efficiency.

Method used

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  • A near-infrared fluorescent emission material excited by broadband ultraviolet-visible light and its preparation method and application
  • A near-infrared fluorescent emission material excited by broadband ultraviolet-visible light and its preparation method and application
  • A near-infrared fluorescent emission material excited by broadband ultraviolet-visible light and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0030] Weigh 0.5589g (2.475mmol) Y 2 o 3 , 0.7112g (6.975mmol) Al 2 o 3 , 1.4839 g (24 mmol) H 3 BO 3 , 0.1401g (1.05mmol) Cr(NO 3 ) 3 9H 2 O and 0.0099g (0.025mmol) Yb 2 o 3 Place in a fume hood and mix, add 50% of the total weight of the mixture in absolute ethanol, grind and mix; dry in a blast drying oven at 80°C; collect the dried mixture powder into a corundum crucible, Put it into a muffle furnace, heat up to 1200°C at a heating rate of 2°C / min, sinter for 5 hours, cool to room temperature, and grind a little to get the target product.

[0031] The fluorescent material prepared in this example is excited at 420nm to obtain a fluorescence emission spectrum, see for details figure 1 (b) spectrum in (b), given by figure 1 Visible, infrared emission main peak wavelength: 983nm, fluorescence intensity of target product (arbitrary unit): 1069236.

Embodiment 3

[0033] Y in Example 2 2 o 3 The amount of addition becomes 0.5476g (2.425mmol), Yb 2 o 3The addition amount of was changed to 0.0296g (0.075mmol), and other conditions were unchanged, and the target product was obtained.

[0034] The fluorescent material prepared in this example is excited at 420nm to obtain a fluorescence emission spectrum, see for details figure 1 (d) spectrum in (d), given by figure 1 Visible, infrared emission main peak wavelength: 983nm, fluorescence intensity of target product (arbitrary unit): 1832976.

Embodiment 4

[0036] Y in Example 2 2 o 3 The amount of addition becomes 0.5250g (2.325mmol), Yb 2 o 3 The addition amount of was changed to 0.0690g (0.175mmol), and other conditions were unchanged, and the target product was obtained.

[0037] The fluorescent material prepared in this example is excited at 420nm to obtain a fluorescence emission spectrum, see for details figure 1 (f) spectrum in , given by figure 1 Visible, infrared emission main peak wavelength: 983nm, fluorescence intensity of target product (arbitrary unit): 3538700.

[0038] Figure 4 It is a fluorescence absorption spectrum diagram of the fluorescent material prepared in this embodiment, and it can be seen from the figure that the fluorescent material has a strong fluorescence intensity at an excitation wavelength between 350nm and 650nm.

[0039] Figure 5 It is the fluorescence emission spectrum diagram of the fluorescent material prepared in this example under excitation of different wavelengths, wherein the...

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Abstract

The invention belongs to the technical field of luminescent materials, and in particular relates to a wideband ultraviolet-visible light exited near infrared fluorescent emitting material and a preparation method and application thereof. The preparation method comprises steps of: mixing oxides of Y<3+>, Al<3+>, Bi<3+>, La<3+> and Yb<3+>, H3BO3 and a Cr salt according to the constitution ratio of all the elements in a formula Y1-x-zMzAl3-y(BO34):Crx<3+>, Yby<3+>, wherein M is one or two of Bi<3+> and La<3+>, and 0<x<=0.2, 0<y<=0.2, and 0<=z<=0.2; adding absolute ethyl alcohol, grinding and drying; and heating the mixed power to be 1000 DEG C-1400 DEG C, and sintering for 3-8 hours. The excitation wavelength of the luminescent material is 350nm-650nm, and the luminescent material can better utilize solar energy and is an ideal near infrared conversion material for increasing the effect of silicon solar cells.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a near-infrared fluorescent emission material excited by broadband ultraviolet-visible light, a preparation method thereof, and an application of the material in silicon solar cell efficiency enhancement. Background technique [0002] Solar cells are an important renewable resource. They are green, environmentally friendly, and can achieve zero-pollution emissions. They have broad application prospects and will occupy an important seat in the world's energy consumption in the near future. They will not only replace some conventional energy sources, but also will Become the main body of the world's energy suppliers. But at present, compared with traditional forms of power generation such as thermal power and hydropower, the cost of solar cell power generation is much higher, so the electricity price remains high, which seriously hinders the large-scale gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80H01L31/055
CPCY02E10/50Y02E10/52
Inventor 余锡宾刘浦俊李晓晴尧志凌刘洁
Owner SHANGHAI NORMAL UNIVERSITY
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