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An up-conversion luminescent material doped with erbium dichloride and its preparation, use and application

A technology of erbium barium dichloride and luminescent materials, applied in luminescent materials, chemical instruments and methods, photovoltaic power generation, etc., can solve problems such as difficulty in functioning, meet the requirements of reducing light source power density, and reduce energy level difference mismatch , The effect of improving the photoelectric conversion efficiency

Inactive Publication Date: 2016-03-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-efficiency up-conversion materials are usually doped with rare earth ions to achieve energy conversion, but the ground state absorption of rare earth ions is often limited to a limited wavelength in the infrared range, and processes such as rare earth ion excited state absorption and phonon coupling absorption are difficult to play a role

Method used

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  • An up-conversion luminescent material doped with erbium dichloride and its preparation, use and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The molar ratio of barium dichloride and erbium trichloride is 72:28, and the ammonium chloride is 24 times the total molar number of barium dichloride and erbium trichloride for raw material weighing. The ammonium chloride was divided into three equal parts, the first part was placed on the bottom of the crucible, and the second part was mixed with barium dichloride and erbium trichloride by grinding and mixing with an agate mortar in a nitrogen-filled glove box. Evenly put it on the first part, and then spread the last part of ammonium chloride on the second part of the mixture of ammonium chloride, barium dichloride and erbium trichloride. Move the crucible with the above mixture into the corundum ark, then put the corundum ark into a high-temperature tubular atmosphere furnace, pass it into an argon atmosphere for protection, and keep it at 950°C for 1 hour to prepare the up-conversion luminescent material. Simultaneously irradiate the sample with 808nm (monochromat...

Embodiment 2

[0027] The molar ratio of barium dichloride and erbium trichloride is 80:20, and the ammonium chloride is 20 times the total molar number of barium dichloride and erbium trichloride for raw material weighing. The ammonium chloride was divided into three equal parts, the first part was placed on the bottom of the crucible, and the second part was mixed with barium dichloride and erbium trichloride by grinding and mixing with an agate mortar in a nitrogen-filled glove box. Evenly put it on the first part, and then spread the last part of ammonium chloride on the second part of the mixture of ammonium chloride, barium dichloride and erbium trichloride. Move the crucible with the above mixture into the corundum ark, then put the corundum ark into a high-temperature tubular atmosphere furnace, pass it into an argon atmosphere for protection, and keep it at 800°C for 3 hours to prepare the up-conversion luminescent material. Simultaneously irradiate the sample with 800nm ​​(monochro...

Embodiment 3

[0029] The molar ratio of barium dichloride and erbium trichloride is 65:35, and the ammonium chloride is 30 times the total molar number of barium dichloride and erbium trichloride for raw material weighing. The ammonium chloride was divided into three equal parts, the first part was placed on the bottom of the crucible, and the second part was mixed with barium dichloride and erbium trichloride by grinding and mixing with an agate mortar in a nitrogen-filled glove box. Evenly put it on the first part, and then spread the last part of ammonium chloride on the second part of the mixture of ammonium chloride, barium dichloride and erbium trichloride. Move the crucible with the above mixture into the corundum ark, then put the corundum ark into a high-temperature tubular atmosphere furnace, pass it into an argon atmosphere for protection, and keep it at 1100°C for 2 hours to prepare the up-conversion luminescent material. Simultaneously irradiate the sample with 808nm (monochrom...

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Abstract

The invention discloses an upconversion luminescent material of erbium-doped barium dichloride as well as a preparation method, a using method and application thereof. The preparation method comprises the following steps: completely mixing barium dichloride and erbium trichloride in an inert atmosphere, and preserving heat at 800-1100 DEG C for 1-3 hours. The material, when being used, is excited through more than two near infrared light rays within a wavelength range of 800-1000nm; luminous intensities of the material on blue light, green light and red light are 2-10 times as much as total luminescence of monochromatic excitation. The material, when being applied, is arranged on the back surface of an amorphous silicon thin film solar cell; two or more near infrared light rays penetrate the cell to excite the material to emit light, and the cell generates electric energy through a photovoltaic effect; compared to monochromatic excitation, a short-circuit current density of the cell is respectively increased by 26% to 9 times and a photoelectric conversion efficiency is enhanced by 28-83%, which has a far-reaching influence on further improvement of the photoelectric conversion efficiency of the amorphous silicon thin film solar cell.

Description

technical field [0001] The invention relates to an up-conversion luminescent material and its preparation, use and application, in particular to an up-conversion luminescence material doped with erbium dichloride and its preparation, use and application. Background technique [0002] In order to solve the global energy crisis, solar cells that use the photovoltaic effect to directly convert solar energy into electrical energy have opened up a broad road for the rational use of solar energy today. However, the maximum theoretical photoelectric conversion efficiency of widely used silicon-based solar cells is only 30%, and its actual conversion efficiency is only 15%. Under normal circumstances, the energy of the solar spectrum (AM1.5) reaching the ground is about 100mW / cm 2 , covering wavelength 200-2500nm. For silicon-based solar cells, the energy level bandgap E g ~1.12eV, only sunlight with a wavelength of λ<1100nm can be absorbed, and near-infrared light with a wave...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/61H01L31/055
CPCY02E10/52
Inventor 邱建荣陈智
Owner SOUTH CHINA UNIV OF TECH
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