Photo-electro separated solar cell back reflector

A solar cell and photoelectric separation technology, which is applied in photovoltaic power generation, circuits, electrical components, etc., can solve the problems of impact, light-trapping film microstructure, etc., and achieve the effects of improving light absorption, good electrical performance, and low cost

Inactive Publication Date: 2010-09-01
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to propose a photoelectrically separated solar cell back reflector to solve the contradiction between light trapping of the current solar cell back reflector and the influence on the microstructure of the film

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  • Photo-electro separated solar cell back reflector
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  • Photo-electro separated solar cell back reflector

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0017] The solar cell back reflector with photoelectric separation provided by the invention is composed of a transparent conductive film, a transparent substrate and a high reflection material. The working principle of the back reflector: the light that is not absorbed by the absorbing layer passes through the transparent conductive film and the transparent substrate and is reflected by the highly reflective material, so that the light returns to the absorbing layer to be absorbed again, and the photogenerated carriers generated by the absorbing layer are respectively absorbed The front electrode and the transparent conductive film collect the light, while the light trapping is mainly realized by the highly reflective mat...

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Abstract

The invention discloses a photo-electro separated solar cell back reflector, which comprises a three-layer structure of a transparent conductive film (3), a transparent substrate (4) and a highly reflective material (5), wherein one side of the transparent substrate (4) is not provided with a texture, while the other side is provided with a texture; the transparent conductive film (3) is deposited on the side of the transparent substrate (4) without the texture; and the highly reflective material (5) is deposited on the side of the transparent substrate (4) with the texture. The photo-electro separated solar cell back reflector overcomes the contradiction between the cell light absorption and the electrical transport, and can effectively improve the light absorption and maintain better electric performance of the solar cell. Therefore, the photo-electro separated solar cell back reflector improves the photoelectric conversion efficiency of the cell, and also has the advantages of low cost and scale production simultaneously.

Description

technical field [0001] The invention relates to the technical field of photovoltaic device manufacturing, in particular to a back reflector for photoelectrically separated solar cells. Background technique [0002] On the one hand, the back reflector of the solar cell serves as an electrode to collect photogenerated carriers, and on the other hand, it reflects the light that passes through the absorbing layer, so that the light is absorbed by the absorbing layer again, increasing the light absorption of the cell, thereby increasing the photocurrent density. [0003] The current battery back reflector generally adopts the structure of "transparent conductive film / high reflective material layer / substrate". Since the light trapping effect of the back reflector increases with the increase of roughness, in order to achieve more effective light trapping, rough The substrate, that is, the texture is formed on the surface of the transparent conductive film. However, there are two p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0232H01L31/0224H01L31/054
CPCY02E10/52
Inventor 肖海波曾湘波刘石勇彭文博谢小兵姚文杰王超
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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