Solar cell sheet, and preparation method, preparation device, and solar cell thereof

A technology of solar cells and equipment, applied in the field of solar energy, can solve the problems of multi-light absorption loss, affecting the photoelectric conversion efficiency of solar cells, and poor performance of PN junction interface

Inactive Publication Date: 2018-11-02
BEIJING APOLLO DING RONG SOLAR TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are two problems in existing thin-film solar cells: on the one hand, a thicker buffer layer will produce more light absorption loss, which affects the photoelectric conversion effic...

Method used

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  • Solar cell sheet, and preparation method, preparation device, and solar cell thereof
  • Solar cell sheet, and preparation method, preparation device, and solar cell thereof
  • Solar cell sheet, and preparation method, preparation device, and solar cell thereof

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Embodiment Construction

[0054] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0055] The inventors found that the existing solar cell buffer layer is thicker and the PN junction interface has more defect states, because the P-type absorber layer is generally polycrystalline, and high-efficiency thin-film solar cells require a grain size of 0.5-1um , the surface of the absorbing layer of this polycrystalline structure is relatively rough, so a relatively thick buffer layer is required to completely cover the rough surface of the absorbing layer, resulting in more light absorption loss, affecting the photoelectric conversion efficiency of the solar cell, and the rough absorbing The surface of the layer causes more defect states at the PN junction interface to form a recombination center, resulting in poor perf...

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Abstract

The application provides a solar cell sheet, and a preparation method, a preparation device, and a solar cell thereof, wherein by processing the absorption layer before forming the buffer layer to reduce the surface roughness of the absorption layer, the preparation method of the solar cell sheet is capable of, on one hand, reducing the nucleation barrier at the surface of the absorption layer, forming a PN junction with less defect state with the buffer layer, and improving the interface performance of the PN junction; and on the other hand, forming a denser buffer layer on the surface of thesmooth absorption layer, and only needing to form a thin buffer so as to completely cover the surface of the absorption layer, thereby reducing the light absorption loss of the buffer layer, and improving the conversion efficiency of the solar cell.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a solar battery sheet, its preparation method, preparation equipment and solar battery. Background technique [0002] The PN junction of the current mainstream thin-film solar cells generally consists of a P-type absorber layer and an N-type buffer layer. The existing preparation method is to directly form an N-type buffer layer on the P-type absorber layer, thereby forming a PN junction required for power generation of thin-film solar cells, and the P-type absorber layer and the N-type buffer layer form the PN junction interface. [0003] There are two problems in existing thin-film solar cells: on the one hand, a thicker buffer layer will produce more light absorption loss, which affects the photoelectric conversion efficiency of solar cells; on the other hand, more defect states will be generated at the PN junction interface, A recombination center is formed, resulting i...

Claims

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Application Information

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IPC IPC(8): H01L31/18H01L31/0236H01L31/04
CPCH01L31/02366H01L31/04H01L31/18Y02E10/50Y02P70/50
Inventor 辛科
Owner BEIJING APOLLO DING RONG SOLAR TECH
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