Photoconversion material for enhancing energy efficiency of solar cells and preparation method thereof

A solar cell and light conversion technology, which is applied in the directions of luminescent materials, chemical instruments and methods, circuits, etc., can solve the problem that the light conversion efficiency of silicon-based solar cells cannot be improved, and achieve the effect of improving the light conversion efficiency.

Inactive Publication Date: 2015-11-11
FOSHAN CARRO ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although the above-mentioned materials all disclose fluorescent materials, they cannot convert the light of 200-400nm in a solar absorp

Method used

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  • Photoconversion material for enhancing energy efficiency of solar cells and preparation method thereof
  • Photoconversion material for enhancing energy efficiency of solar cells and preparation method thereof
  • Photoconversion material for enhancing energy efficiency of solar cells and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] Convert a 200-400nm ultraviolet light to a green and orange fluorescent material of about 500-650nm, and its chemical composition is aL.bM.cN:dQ(L=Ca, Sr, M=BO 3 ,N=SiO 2 , Q=La, Ce, Tb, Gd, Mn one or more than two compounds), a=1, b=5.9, c=0.1, d=0.5. That is, the chemical composition is Sr 0.1 Ca 0.9 B 5.9 Si 0.1 La 0.43 Ce 0.03 Tb 0.01 Gd 0.01 Mn 0.02 O 10.79 , According to the above chemical composition, 90 grams of CaCO 3 , 14.762g SrCO 3 364.67g H 3 BO 3 , 6 grams of SiO 2 , 70.05 grams of La 2 O 3 , 5.175 grams of CeO 2 , 1.87 g Tb 4 O 7 , 1.81g Gd 2 O 3 , 1.74 g MnO 2 Mix the materials in a closed container; then mix the mixture in 95% N 2 -5% H 2 In the atmosphere, heat preservation in a synthesis furnace at 1300°C for 6 hours, cooling, crushing and grading, and sieving to obtain the light conversion material. Its excitation and emission spectra are as figure 1 Shown.

[0036] The above 12% (mass ratio%) light conversion material is added to the hi...

Example Embodiment

[0037] Such as figure 1 As shown, the main emission peaks of the photoconversion material obtained in this embodiment are located at about 496nm, 545nm, and 610nm, which can be effectively excited in the 250-400nm band, and the strongest excitation peak is located at 325nm; figure 2 As shown, the material crystal belongs to a rhombohedral hexagon, R32, unit cell parameters a=b=9.302, c=7.26. Example 2

[0038] Convert a 200-400nm ultraviolet light to a green and orange fluorescent material of about 500-650nm, and its chemical composition is aL.bM.cN:dQ(L=Li, Na, M=BO 3 ,N=Al 2 O 3 , Q=Y, Lu, Ce, one or more than two compounds), a=6, b=3, c=0.01, d=1, that is, the chemical composition is Li 5.9 Na 0.1 B 3 Al 0.01 Y 0.9 Lu 0.05 Ce 0.05 O 9.03 , According to the above chemical composition, 217.95 grams of Li 2 CO 3 , 5.3 grams of Na 2 CO 3 , 104.43 g B 2 O 3 , 0.51g Al 2 O 3 , 101.56g Y 2 O 3 , 8.625g CeO 2 9.9485 grams of Lu 2 O 3 Mix the materials in a closed container; then mix th...

Example Embodiment

[0040] Example 3

[0041] Convert a 200-400nm ultraviolet light to a green and orange fluorescent material of about 500-650nm, and its chemical composition is aL.bM.cN:dQ(L=Ca, Sr, Ba, M=BO 3 ,N=SiO 2 ,Q=Y, Eu one or more than two compounds), a=5.6, b=0.2, c=1.8, d=0.4, that is, the chemical composition is Ca 0.1 Sr 5.2 Ba 0.3 B 0.2 Si 1.8 Y 0.2 Eu 0.2 O 10.1 , According to the above chemical composition, 10 grams of CaCO 3 , 768.82g SrCO 3 , 59.19g BaCO 3 , 12.36 g H 3 BO 3 , 108 grams of SiO 2 , 22.51 g Y 2 O 3 , 35.19 grams of Eu 2 O 3 Mix in an airtight container, mix in an airtight container; then mix the mixture in 95% Ar-5% H 2 In the atmosphere, heat preservation in a synthesis furnace at 1500°C for 6 hours, cooling, crushing, grading, and sieving to obtain the light conversion material. The excitation and emission spectra are as Figure 4 Shown. Mix the materials in a closed container; then mix the mixture in 95% N 2 -5% H 2 Under the atmosphere, keep the temperature in a ...

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PUM

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Abstract

The invention discloses a photoconversion material for enhancing energy efficiency of solar cells. The general formula of the chemical composition is aL.bM.cN.dQ, wherein L is one or more of Ca, Sr, Ba, Li, Na and K, and M is one or more of BO3 and PO4; N is SiO2 or Al2O3, and Q is one or more of Y, Mn, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and 0<=a<=5, 0<=b<=6, 0<=c<=6, and 0<=d<=1. The invention also discloses a preparation method of the photoconversion material. The photoconversion material disclosed by the invention can absorb 200-500nm light in the solar energy spectrum and convert the 200-500nm light into 500-650nm green, orange or red fluorescence, thereby enhancing the photoconversion efficiency of the silicon-base solar cell.

Description

technical field [0001] The invention relates to the technical field of light conversion materials, in particular to a light conversion material for improving the energy efficiency of solar cells and a preparation method thereof. Background technique [0002] Solar energy has the advantages of being renewable and non-polluting, and is a very competitive green new energy. Silicon-based solar cell photovoltaic power generation technology is considered to be the most promising new energy technology today. [0003] A silicon-based solar cell is a common type of solar cell in the industry. The principle of silicon-based solar cells is to add high-purity semiconductor materials (silicon) into dopants to make them exhibit different properties to form p-type semiconductors and n-type semiconductors, and to join p-n type semiconductors, so that they can be formed p-n junction. When sunlight irradiates a semiconductor with a p-n structure, the energy provided by photons may excite el...

Claims

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Application Information

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IPC IPC(8): C09K11/79C09K11/80H01L51/46
CPCY02E10/549
Inventor 张建生
Owner FOSHAN CARRO ELECTRICAL
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