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A kind of ultra-clear photovoltaic glass and its preparation method and application

A photovoltaic glass, glass technology, used in photovoltaic power generation, electrical components, circuits, etc.

Active Publication Date: 2011-11-30
信义光伏产业(安徽)控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, these spectral losses lead to a theoretical maximum conversion efficiency of about 31% for a single-junction monocrystalline silicon cell with a forbidden band width Eg=1.1ev

Method used

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  • A kind of ultra-clear photovoltaic glass and its preparation method and application
  • A kind of ultra-clear photovoltaic glass and its preparation method and application
  • A kind of ultra-clear photovoltaic glass and its preparation method and application

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preparation example Construction

[0061] The method for preparing the above-mentioned ultra-clear photovoltaic glass, the method comprises the following steps:

[0062] Heat the matrix glass and the rare earth compound doped in the matrix glass to 1500-1600°C to melt, after clarification and cooling, use the float process or calendering process to make flat glass, and then obtain the ultra-white glass by annealing process Photovoltaic glass.

[0063] In the preparation method of the ultra-white photovoltaic glass, it is only necessary to mix the components according to the formula, and heat and melt, without special equipment and environmental requirements, and the preparation method is simple; and it is obtained by the existing mature float process or calendering process. Flat glass makes the yield of the final product high; in addition, due to the small proportion of rare earth doping, it does not affect the existing float process or calendering process, and only needs to be slightly adjusted in process para...

Embodiment 1

[0066] Based on oxides, SiO will account for 72wt% of the total weight percentage of ultra-clear photovoltaic glass 2 , 14wt% Na 2 O, 8wt% CaO, 4wt% MgO and 1wt% Al 2 o 3 The matrix glass component and the rare earth compound Sm accounting for 1.0wt% of the total weight percentage of the ultra-clear photovoltaic glass 2 o 3 Mix, then heat the mixture to 1550°C to melt it, then clarify and cool the molten mixture, then use the float process or calendering process to make flat glass, and finally anneal the flat glass to obtain the ultra-white Photovoltaic glass. The emission spectrum of the ultra-clear photovoltaic glass in this embodiment is shown in figure 2 , the optimal emission wavelength is 600nm, and the resulting fluorescence intensity is the strongest; the excitation light spectrum of the ultra-clear photovoltaic glass in this embodiment is shown in image 3 , and its optimum excitation wavelength is 400nm. When the thickness of the ultra-clear photovoltaic glas...

Embodiment 2

[0068] Based on oxides, SiO will account for 72wt% of the total weight percentage of ultra-clear photovoltaic glass 2 , 14wt% Na 2 O, 8wt% CaO, 3wt% MgO and 1wt% Al 2 o 3 The matrix glass component and 1wt% CeO accounting for the total weight percentage of the ultra-clear photovoltaic glass 2 and 1 wt% of Sm 2 o 3 Mix, then heat the mixture to 1550°C to melt it, then clarify and cool the molten mixture, then use the float process or calendering process to make flat glass, and finally anneal the flat glass to obtain the ultra-white Photovoltaic glass. The emission spectrum of the ultra-clear photovoltaic glass in this embodiment is shown in Figure 5 , its optimum emission wavelength is 418nm, and the intensity of fluorescence produced is the strongest; its excitation light spectrum is shown in Figure 6 , and its optimal excitation wavelength is 350nm. When the thickness of the ultra-clear photovoltaic glass in this embodiment is 4mm, its measured transmittance curve i...

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Abstract

The invention provides super-white photovoltaic glass and a preparation method and application thereof. The super-white photovoltaic glass comprises substrate glass and a rare earth compound doped into the substrate glass, wherein the rare earth compound is rare earth oxide or rare earth-containing mineral; the rare earth oxide is at least one of CeO2, Sm2O3, Eu2O3, Tb2O3 and Dy2O3; and the rare earth-containing mineral comprises at least one element of Ce, Sm, Eu, Tb and Dy. The super-white photovoltaic glass can convert ultraviolet light into visible light, so that the transmittance of the visible light is enhanced; when the super-white photovoltaic glass is used for a glass cover plate of a solar cell, the conversion efficiency of the cell can be improved, generated energy is increased, and the aging of sealing materials such as ethylene-vinyl acetate (EVA) caused by the ultraviolet light can be reduced; and the preparation method of the super-white photovoltaic glass is simple, easy to operate and control and suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of glass for solar cells, and in particular relates to an ultra-clear photovoltaic glass and its preparation method and application. Background technique [0002] The solar radiation received by the earth's surface can meet 10,000 times the global energy demand, and the average annual radiation per square meter of the earth's surface can produce 1700kW.h of electricity. According to the International Energy Agency, installing solar photovoltaic systems on 4% of the world's deserts is enough to meet global energy demand. Solar photovoltaic enjoys a broad development space (roof, building surface, open space and desert, etc.), and its potential is huge. The proportion of renewable energy represented by solar energy in the energy structure will gradually increase. [0003] Ultra-clear glass is also known as low-iron glass, photovoltaic glass, etc. The industry standard "Glass for Solar Cells" defines that the iron conte...

Claims

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Application Information

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IPC IPC(8): C03C3/095H01L31/048
CPCY02E10/50
Inventor 董清世万军鹏
Owner 信义光伏产业(安徽)控股有限公司
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