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A kind of down conversion glass substrate and its preparation method and the application in cdte solar cell

A technology for solar cells and glass substrates, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as reducing the conversion efficiency of solar cells, achieve the effects of reducing parasitic absorption, improving conversion efficiency, and simple preparation process

Active Publication Date: 2016-12-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a structure increases parasitic absorption at the same time, so that part of the converted near-infrared light is absorbed, scattered or escaped, thereby reducing the conversion efficiency of solar cells.

Method used

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  • A kind of down conversion glass substrate and its preparation method and the application in cdte solar cell
  • A kind of down conversion glass substrate and its preparation method and the application in cdte solar cell
  • A kind of down conversion glass substrate and its preparation method and the application in cdte solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh germanium oxide, magnesium oxide, aluminum oxide, bismuth oxide, thulium oxide, and 73.5GeO 2 -14MgO-11Al 2 o 3 -0.5Bi 2 O-1Tm 2 o 3 , the weighed raw materials are mixed by ball milling and compacted in a crucible, melted at a temperature of 1550°C for 1.5 hours, stirring evenly during the period, pouring the melted glass onto a copper plate mold, cooling, and annealing Residual stress is removed to obtain a down conversion glass substrate.

[0028] figure 2 Bi prepared for Example 1 2+ and Tm 3+ Emission spectrum and excitation spectrum of co-doped down-conversion glass substrate, AM1.5 solar spectrum and response curve of CdTe solar cell. It can be seen from the figure that the glass substrate prepared in this embodiment can convert the light of 450nm-750nm into the light of 800nm.

[0029] image 3 Bi prepared for Example 1 2+ Single Blend Tm 3+ In monodoped glass, Bi 2+ Excitation and emission spectra, Tm 3+ emission and excitation spectra. Bi...

Embodiment 2

[0032] Weigh germanium oxide, magnesium oxide, aluminum oxide, bismuth oxide, and thulium oxide respectively, according to the proportion of 65GeO 2 -15MgO-15Al 2 o 3- 2 Bi 2 O-3Tm 2 o 3 , the weighed raw materials are mixed by ball milling and compacted in a crucible, melted at a temperature of 1450°C for 5 hours, stirring evenly during the period, pouring the melted glass liquid onto a copper plate mold, cooling, and annealing Residual stress is removed to obtain a down conversion glass substrate.

Embodiment 3

[0034] Weigh germanium oxide, magnesium oxide, aluminum oxide, bismuth oxide, thulium oxide respectively, according to the proportion of 75GeO 2 -15MgO-7Al 2 o 3 -3Tm 2 o 3 , the weighed raw materials are mixed by ball milling and compacted in a crucible, melted at a temperature of 1650°C for 1 hour, stirring evenly during this period, pouring the melted glass liquid onto a copper plate mold, cooling, and annealing Residual stress is removed to obtain a down conversion glass substrate.

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Abstract

The invention discloses a down-conversion glass substrate. The down-conversion glass substrate comprises bismuth ions Bi<2+> and thulium ions Tm<3+>. The down-conversion glass substrate consists of the following oxides at the following molar ratio: 65 to 85 percent of germanium dioxide (GeO2)d, 0 to 15 percent of magnesium oxide (MgO), 0 to 15 percent of aluminum oxide (Al2O3), 0 to 2 percent of bismuth trioxide (Bi2O3) and 0 to 3 percent of thulium oxide (Tm2O3). The invention also discloses a preparation method and an application of the down-conversion glass substrate. The down-conversion glass substrate can absorb the light of 450nm to 750nm so as to emit the light of 800nm, so that the CdTe solar battery can be well responded. The down-conversion glass substrate is applied to the CdTe solar battery and can substitute a down-conversion layer and a glass substrate of the existing CdTe solar battery, the conversion efficiency of the solar battery can be improved, and the packaging efficiency can be increased.

Description

technical field [0001] The invention relates to the field of glass preparation, in particular to a Bi 2+ and Tm 3+ Co-doped down-conversion glass substrate and its preparation method and application in CdTe solar cells. Background technique [0002] CdTe solar cells are considered as a new generation of solar cell materials because of their excellent conversion efficiency. However, although its conversion efficiency is greater than that of Si-based solar cells, it still cannot meet the requirements of industrial production, because the response peak of the solar spectrum is around 500nm, and all solar cells are not fully in line with the solar spectrum. CdTe The effective absorption peak of solar cells is located near 800nm. Therefore, it was proposed to use a down-conversion layer to convert visible light into near-infrared light, and add a down-conversion layer on the glass substrate of the CdTe solar cell. The structure is as follows: figure 1 As shown, it includes a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/253H01L31/0232H01L31/02H01L31/18H01L31/055
CPCY02E10/52Y02P70/50
Inventor 李杨董国平邱建荣马志军
Owner SOUTH CHINA UNIV OF TECH
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