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Al<3+> induced ultraviolet-visible light wideband excited silicate strong near infrared fluorescence emitting material as well as preparation method and application thereof

A broadband excitation and infrared fluorescence technology, which is applied in the direction of luminescent materials, chemical instruments and methods, sustainable manufacturing/processing, etc., can solve the problem that silicates have no near-infrared emission, achieve safe and non-toxic products, and improve near-infrared emission , The effect of cheap and easy-to-obtain raw materials

Inactive Publication Date: 2015-06-03
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, experiments have shown that only Ce 3+ ,Nd 3+ Co-doped silicates have no efficient NIR emission

Method used

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  • Al&lt;3+&gt; induced ultraviolet-visible light wideband excited silicate strong near infrared fluorescence emitting material as well as preparation method and application thereof
  • Al&lt;3+&gt; induced ultraviolet-visible light wideband excited silicate strong near infrared fluorescence emitting material as well as preparation method and application thereof
  • Al&lt;3+&gt; induced ultraviolet-visible light wideband excited silicate strong near infrared fluorescence emitting material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of Al provided in this embodiment 3+ The preparation method of the silicate strong near-infrared fluorescent emission material excited by ultraviolet-visible light broadband, the specific steps are as follows:

[0034] 1) Weigh 4.3624g SrCO 3 (29.550mmol), 0.6008g SiO 2 (10.000mmol), 0.0430g CeO 2 (0.250mmol) and 0.0336g Nd 2 o 3 (0.100mmol);

[0035] 2) At room temperature, the above raw materials are fully ground and mixed evenly;

[0036] 3) At 95% N 2 / 5%H 2 In a reducing atmosphere, heat up to 700°C at a rate of 3°C / Min, keep warm for 2 hours, then continue to heat up to 1450°C at a rate of 3°C / Min, and hold for 4 hours;

[0037] 4) After the material is lowered to room temperature with the furnace at a rate of 3°C / Min, it is ground again to obtain the target product.

[0038] figure 2 Middle a) is the near-infrared spectrum of the near-infrared luminescent material prepared in this embodiment picture ;Depend on picture It can be seen that i...

Embodiment 2

[0040] The preparation method of this embodiment is the same as that of Example 1, except that step 1) 0.6008g SiO 2 (10.000mmol) into 0.5738g SiO 2 (9.550mmol) and 0.0229g Al 2 o 3 (0.225 mmol).

[0041] figure 2 and image 3 Middle b) is the near-infrared spectrum of the near-infrared luminescent material prepared in this embodiment picture ;Depend on picture It can be seen that the excitation wavelength is 410nm; the main emission peak wavelength is 1090nm; the fluorescence intensity is 20001.06.

Embodiment 3

[0043] The preparation method of this embodiment is the same as that of Example 1, except that step 1) 4.3624g SrCO 3 (29.550mmol) and 0.0336g Nd 2 o 3 (0.100mmol) into 4.3698gSrCO 3 (29.600mmol) and 0.0252g Nd 2 o 3 (0.075mmol); 0.6008g SiO 2 (10.000mmol) into 0.5768g SiO 2 (9.600mmol) and 0.0204g Al 2 o 3 (0.200 mmol).

[0044] image 3 Middle c) is the near-infrared spectrum of the near-infrared luminescent material prepared in this embodiment picture ;Depend on picture It can be seen that the excitation wavelength is 410nm; the main emission peak wavelength is 1090nm; the fluorescence intensity is 13491.08.

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Abstract

The invention belongs to the technical field of luminescent materials, and provides a preparation method and an application of an Al<3+> induced ultraviolet-visible light wideband excited silicate strong near infrared fluorescence emitting material. The chemical expression formula of the material is: M(3-x-y)Si(l-z)O5: Cex<3+>, Alz<3+>, Ndy<3+>, M(2-x-y)Si(l-z)O4: Cex<3+>, Alz<3+>, Ndy<3+>, or M(1-x-y)Si(l-z)O3: Cex<3+>, Alz<3+>, Ndy<3+>, wherein M is one or more selected from Ca<2+>, Sr<2+> and Ba<2+>, x is greater than 0 and less than or equal to 0.1, Y is greater than 0 and less than or equal to 0.1, and z is greater than 0 and less than or equal to 0.1. Through the introduction of the inducing agent Al<3+>, the energy transmission between Ce<3+> and Nd<3+> is enhanced, so as to induce the Nd<3+> strong near infrared emitting successfully, so the material is a perfect near infrared light transmitting material for silicon solar cell synergism. Meanwhile, the simple preparation process is applicable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to an Al 3+ Preparation method for strong near-infrared fluorescence emission of silicates induced by ultraviolet-visible broadband excitation and its application in efficiency enhancement of silicon-based solar cells. Background technique [0002] Since the 1970s, the world is facing an increasingly prominent energy crisis, and human beings are constantly looking for new energy sources to replace fossil fuels. Among many new energy sources, solar energy is considered to be the most promising energy source to meet future human needs. The utilization of solar energy mainly converts light energy into electrical energy through solar cells. However, the low photoelectric conversion efficiency makes the power generation cost of solar cells very high. Studies have shown that the photoelectric conversion efficiency of solar cells in the laboratory and mass prod...

Claims

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Application Information

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IPC IPC(8): C09K11/59H01L31/0264H01L31/18
CPCY02P70/50
Inventor 余锡宾陈佳军李晓晴姚慧刘洁
Owner SHANGHAI NORMAL UNIVERSITY