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Method of applying up-conversion materials to crystalline silicon cell

A technology of conversion materials and crystalline silicon cells, applied in the field of solar cells, can solve the problems of lowering up-conversion efficiency, complex application process, harsh requirements, etc.

Inactive Publication Date: 2012-03-21
上海泰阳绿色能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complexity of the application process, it has not been able to be applied
The spectral up-conversion material can be coated on the surface of ultra-white glass for solar cell module encapsulation in the form of sol, but due to the complex composition and harsh requirements of the up-conversion material, it is difficult to coat the glass surface in the form of a thin film. Adhesion and anti-aging performance are the key technical difficulties, and the heat treatment process may greatly reduce the up-conversion efficiency

Method used

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Examples

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Effect test

Embodiment 1

[0013] The up-conversion material in this embodiment uses a fluorine-containing compound, and the method for applying the compound to a crystalline silicon cell is as follows:

[0014] 1 Preparation of fluorine-containing compound up-conversion spectroscopic materials;

[0015] 2 Doping 1% fluorine-containing compound in the copolymer (EVA) material of ethylene and vinyl acetate;

[0016] 3 The fluorine-containing compound is uniformly dispersed in the ethylene-vinyl acetate copolymer (EVA) material without air bubbles.

Embodiment 2

[0018] The up-conversion material in this embodiment adopts rare earth metal halides, and the method of applying the compounds in crystalline silicon cells is as follows:

[0019] 1 Preparation of rare earth metal halide up-conversion spectroscopic materials;

[0020] 2 doping the rare earth metal halide with a weight ratio of 1% in the copolymer (EVA) material of ethylene and vinyl acetate;

[0021] 3 Rare earth metal halides are uniformly dispersed in the ethylene-vinyl acetate copolymer (EVA) material without air bubbles.

Embodiment 3

[0023] The up-conversion material in this embodiment adopts rare earth metal oxide, and the method for applying the compound to crystalline silicon cells is as follows:

[0024] 1 Preparation of rare earth metal oxide up-conversion spectroscopic materials;

[0025] 2 doping the rare earth metal oxide with a weight ratio of 1% in the copolymer (EVA) material of ethylene and vinyl acetate;

[0026] 3 Rare earth metal oxides are uniformly dispersed in the ethylene-vinyl acetate copolymer (EVA) material without air bubbles.

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Abstract

The invention relates to a method of applying up-conversion materials to crystalline silicon cell. 0-20wt% of the up-conversion materials are doped into the copolymer of ethylene and ethyl vinyl acetate (EVA) used for encapsulating the cell module, or doped into polyvinyl butyral (PVB). In the fabrication process of the cell module, the function of the doped up-conversion material will not be lost or greatly reduced due to the heat technical process. When sunlight penetrates through the copolymer of ethylene and ethyl vinyl acetate (EVA) or through the polyvinyl butyral (PVB) via a surface layer of ultra-white glass, near-infrared light can be converted into visible light; therefore, solar cells absorb more lights, so that the optoelectronic conversion efficiency of the solar cells can be improved; moreover, the complex process of applying the up-conversion spectrum materials will be greatly simplified.

Description

technical field [0001] The invention relates to a solar battery technology, in particular to a method for applying an up-conversion material to a crystalline silicon battery. Background technique [0002] The theoretical maximum value of the photoelectric conversion efficiency of the widely used crystalline silicon solar cells is about 30%, and the actual conversion efficiency is about 20%. Under normal circumstances, the energy of the solar spectrum (AM1.5) reaching the ground is about 1000W / m 2 , the wavelength covers 200-2500nm. However, only sunlight with energy greater than the energy gap Eg>1.12eV of silicon solar cells and λ<1100nm can be absorbed (carrier thermalization will also reduce the efficiency of silicon cells), while λ>1100nm cannot be absorbed and utilized. How to absorb sunlight more fully and more reasonably and improve the photoelectric conversion efficiency of crystalline silicon solar cells is one of the focal issues of widespread concern at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/048
CPCY02E10/50Y02P70/50
Inventor 郭明星熊胜虎孔慧周世斌何涛
Owner 上海泰阳绿色能源有限公司
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