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Tb3+-Yb3+ co-doped oxyfluoride glass capable of improving solar efficiency

A technology of oxyfluoride and solar energy, applied in glass production, glass molding, glass manufacturing equipment, etc., can solve the problems of low conversion efficiency of silicon-based solar cells, solve serious heat loss and transmission loss, reduce loss, Effect of improving conversion efficiency

Inactive Publication Date: 2015-08-26
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the problem that the current conversion efficiency of silicon-based solar cells is low, and provides a Tb-based 3+ -Yb 3+ Co-doped oxyfluoride glass for improved Si-based solar cell efficiency

Method used

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  • Tb3+-Yb3+ co-doped oxyfluoride glass capable of improving solar efficiency
  • Tb3+-Yb3+ co-doped oxyfluoride glass capable of improving solar efficiency
  • Tb3+-Yb3+ co-doped oxyfluoride glass capable of improving solar efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A Tb that enhances the efficiency of Si-based solar energy 3+ -Yb 3+ Co-doped oxyfluoride glass is composed of the following mole fraction components:

[0023] 50mol SiO 2 —20mol Al 2 o 3 —30mol CaF 2 —0.5mol Tb 4 o 7 —0.5mol Yb 2 o 3 .

[0024] above Tb 3+ -Yb 3+ A method for preparing co-doped oxyfluoride glass, comprising the steps of:

[0025] (1), take a specified amount of SiO 2 、Al 2 o 3 , CaF 2 , Tb 4 o 7 and Yb 2 o 3 Grind the powder for 1 hour until uniformly mixed;

[0026] (2) Put the ground powder mixture in a corundum crucible, and keep it in a high-temperature furnace at 1350°C for 95 minutes;

[0027] (3) Pour the molten glass on the steel plate quickly and let it cool down to room temperature naturally;

[0028] (4) Keep the obtained glass in a high-temperature furnace at a temperature of 520°C for 3 hours to remove internal stress;

[0029] (5) Cut and polish the glass to form 2mm thick Tb 3+ -Yb 3+ Co-doped oxyfluoride glass. ...

Embodiment 2

[0032] A Tb that enhances the efficiency of Si-based solar energy 3+ -Yb 3+ Co-doped oxyfluoride glass is composed of the following mole fraction components:

[0033] 50mol SiO 2 —20mol Al 2 o 3 —30mol CaF 2 —0.5mol Tb 4 o 7 —2.5mol Yb 2 o 3 .

[0034] above Tb 3+ -Yb 3+ A method for preparing co-doped oxyfluoride glass, comprising the steps of:

[0035] (1), take a specified amount of SiO 2 、Al 2 o 3 , CaF 2 , Tb 4 o 7 and Yb 2 o 3 Grind the powder for 1 hour until uniformly mixed;

[0036] (2) Put the ground powder mixture in a corundum crucible, and keep it in a high temperature furnace at 1360°C for 90min;

[0037](3) Pour the molten glass on the steel plate quickly and let it cool down to room temperature naturally;

[0038] (4) Keep the obtained glass in a high-temperature furnace at a temperature of 500°C for 3 hours to remove internal stress;

[0039] (5) Cut and polish the glass to form 2mm thick Tb 3+ -Yb 3+ Co-doped oxyfluoride glass.

[00...

Embodiment 3

[0042] A Tb that enhances the efficiency of Si-based solar energy 3+ -Yb 3+ Co-doped oxyfluoride glass is composed of the following mole fraction components:

[0043] 50mol SiO 2 —20mol Al 2 o 3 —30mol CaF 2 —0.5mol Tb 4 o 7 —5mol Yb 2 o 3 .

[0044] above Tb 3+ -Yb 3+ A method for preparing co-doped oxyfluoride glass, comprising the steps of:

[0045] (1), take a specified amount of SiO 2 、Al 2 o 3 , CaF 2 , Tb 4 o 7 and Yb 2 o 3 Grind the powder for 1 hour until uniformly mixed;

[0046] (2) Put the ground powder mixture in a corundum crucible, and keep it in a high-temperature furnace at 1400°C for 100 minutes;

[0047] (3) Pour the molten glass on the steel plate quickly and let it cool down to room temperature naturally;

[0048] (4) Heat the obtained glass in a high-temperature furnace at a temperature of 550°C for 3 hours to remove internal stress;

[0049] (5) Cut and polish the glass to form 2mm thick Tb 3+ -Yb 3+ Co-doped oxyfluoride glass. ...

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Abstract

The invention is applicable to the quantum cutting material based Si base solar cell conversion efficiency improving field and relates to Tb3+-Yb3+ co-doped oxyfluoride glass capable of improving solar efficiency to solve the problems of serious heat losses and penetration losses of current commercial Si base solar cells during conversion from solar energy into electric energy. A Tb3+-Yb3+ co-doped oxyfluoride glass based near-infrared quantum cutting layer is coated on the Si base solar cell, one photon with the wavelength smaller than 5502nm is converted into two near-infrared photons with the wavelength nearby 1000nm by changing the solar spectrum, so that the response matching between the solar spectrum and the Si base solar cell is good, losses caused by spectrum mismatching are reduced, and double light currents are obtained in the wave section nearby 1000nm.

Description

technical field [0001] The invention is applicable to the field of improving the conversion efficiency of Si-based solar cells based on near-infrared quantum shearing materials, and is specifically a kind of Tb that improves the conversion efficiency of Si-based solar cells. 3+ -Yb 3+ Co-doped oxyfluoride glass and preparation method thereof. Background technique [0002] Currently, commercial Si-based solar cells dominate the photovoltaic market, and for single-junction Si-based solar cells with an Eg of 1.12 eV (~1100 nm), the theoretical limit efficiency is 30%. However, the current typical energy conversion efficiency of single-junction monocrystalline Si-based solar cells is only 15%, which is mainly due to the serious heat loss and transmission loss caused by spectral mismatch in the process of solar cells converting solar energy into electrical energy. Near-infrared quantum shearing materials can realize the modulation of the solar spectrum, converting one photon wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/112C03B19/00
CPCY02P40/57
Inventor 段倩倩张文栋桑胜波菅傲群冀建龙张辉邓丽莉任馨宇
Owner TAIYUAN UNIV OF TECH
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