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Up-conversion solar cell and preparation method thereof

A technology of solar cells and converters, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as hindering the improvement of solar cell efficiency and unsatisfactory effects, and achieve the advantages of less addition, improved photoelectric conversion efficiency, and low cost Effect

Inactive Publication Date: 2013-10-09
ZHEJIANG ASTRONERGY
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Problems solved by technology

[0005] At present, the commonly used method for adding up-conversion materials and down-conversion materials is to coat the surface of the battery with a film containing conversion materials or to mix the conversion materials into components EVA and glass, but these methods are not ideal, which seriously hinders the development of solar energy. Improved battery efficiency

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  • Up-conversion solar cell and preparation method thereof

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Embodiment Construction

[0025] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the present invention.

[0026] refer to figure 1 , figure 1 It is a schematic flow chart of a specific embodiment of a method for preparing an up-conversion solar cell according to the present invention.

[0027] Ste...

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Abstract

The invention discloses a preparation method for an up-conversion solar cell. The method comprises the following steps of forming a flocking face on the front face of a silicon chip, forming a P-N junction on the front face of the silicon chip, forming an anti-reflection coating on the P-N junction, forming a back electrode / up-converter system on the back of the silicon chip, and forming a positive electrode on the front face of the silicon chip. Correspondingly, the invention further provides the up-conversion solar cell which sequentially comprises the back electrode / up-converter system, the silicon chip, the P-N junction, the flocking face, the anti-reflection coating and the positive electrode from bottom to top. The back electrode / up-converter system is made of electro-conduction slurry containing metal particles, inorganic glass materials, organic carriers and up-conversion materials. According to the preparation method, under the circumstance that the forbidden bandwidth of solar cell base body materials is not changed, by changing the wave length of some photons, the photons which can not be used in photovoltaic conversion originally are utilized, and therefore the photovoltaic conversion efficiency of the solar cell is improved greatly.

Description

technical field [0001] The invention relates to the field of preparation of crystalline silicon solar cells, in particular to an up-conversion solar cell and a preparation method thereof. Background technique [0002] The forbidden band width of crystalline silicon is 1.12eV, and the available sunlight wavelength is lower than 1120nm. Therefore, the utilization rate of solar photons in single crystalline silicon solar cells is not high, and its theoretical efficiency limit is 30%, and most of them The energy loss is due to a mismatch between the spectrum that solar cells can effectively use and the standard solar spectrum. To improve the utilization rate of solar photons, it can be achieved by two means: first, change the solar cell structure so that it can use sunlight more effectively; second, change the spectral distribution of sunlight reaching the P-N junction to make it It more closely matches the response of solar cells. [0003] Among them, the first method can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/055
CPCY02E10/52Y02P70/50
Inventor 石强李旺陆威韩玮智牛新伟蒋前哨金建波陆川仇展炜
Owner ZHEJIANG ASTRONERGY
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