CdTe solar cell and method for manufacturing same

A technology for solar cells and electrode areas, applied in the field of solar cells, can solve the problems of low photoelectric conversion efficiency of cadmium telluride solar cells, etc., and achieve the effects of improving photoelectric conversion efficiency, reducing process flow, and improving light utilization

Active Publication Date: 2012-10-10
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of low photoelectric conversion efficiency of existing large-scale manufactured cadmium telluride solar cells, the present invention provides a method that can reduce the complexity of the cell manufacturing process, reduce the process cost, and greatly improve the efficiency of the solar cells while realizing large-scale production. Highest conversion efficiency of solar cells, new structure CdTe solar cells

Method used

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  • CdTe solar cell and method for manufacturing same
  • CdTe solar cell and method for manufacturing same

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Specifically, the CdTe solar cell is prepared through the following steps:

[0058] (a) Pretreatment of glass substrate G: use 2.2mm thick ordinary glass as the substrate, first use acetone to ultrasonically clean it for 10 minutes to remove the grease on the glass surface, and then use cleaning agent to ultrasonically clean it for 10 minutes to remove inorganic dirt on the glass surface Then use deionized water to ultrasonically clean for 10 minutes to remove impurities on the glass surface, and finally dry the glass and put it into the pretreatment chamber, and use plasma to clean the glass substrate;

[0059] (b) Production of CdTe thin film P: put the glass substrate on the workpiece rack of vacuum coating equipment, and the evaporation source is high-purity CdTe powder. Vacuum down to 1×10 -3 Pa, enter Ar gas, adjust the flow rate to 10ml / min, adjust the temperature of the sublimation source to 600°C, the temperature of the substrate to 500°C, and coat the film fo...

Embodiment 2

[0065] The difference from Example 1 is that the thickness of the glass substrate G is 3.2 mm.

Embodiment 3

[0067] The difference from Example 1 is that the thickness of the light absorbing layer P is 2um.

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PUM

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Abstract

The invention provides a CdTe solar cell, comprising a glass substrate, a light absorption layer, a first electrode area, and a second electrode area. The light absorption layer is laminated on the glass substrate, and the upper surface of the light absorption layer is provided with the first electrode area and the second electrode area; the first electrode area comprises a corroded light absorption layer, a back contact transition layer and a positive electrode layer laminated in sequence; the second electrode area comprises an N-type layer and a P-type layer laminated in sequence; the corroded light absorption layer is in contact with the upper surface of the light absorption layer; the N-type layer is in contact with the upper surface of the light absorption layer; and the first electrode area and the second electrode area are insulated from each other. The solar cell is of a novel structure, which reduces the technical process and the manufacturing cost, significantly improves the photoelectric conversion efficiency of the CdTe solar cell, and is beneficial to mass production.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to a CdTe solar cell and a manufacturing method thereof. Background technique [0002] Cadmium telluride is a compound semiconductor whose energy gap width is most suitable for photoelectric energy conversion. A solar cell made of this semiconductor is a device that directly converts light energy into electrical energy, and has a high theoretical conversion efficiency, which is 27% at room temperature. Moreover, cadmium telluride is easily deposited into a large-area film with a high deposition rate. Therefore, compared with silicon solar cells, the manufacturing cost of cadmium telluride thin-film solar cells is low, and it is a new type of solar cells with broad application prospects. [0003] The basic structure of a traditional CdTe solar cell is: glass substrate G / transparent conductive film layer T / CdS layer N / CdTe layer P / transition layer DE / back electrode layer M, the specific s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0272H01L31/042H01L31/18
CPCH01L31/18H01L31/073H01L31/1828Y02E10/50H01L31/0272H01L31/022441H01L31/042Y02E10/543Y02P70/50
Inventor 邓瑞周勇陈靖华
Owner BYD CO LTD
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