Crystalline silicon solar cell with low series resistor and preparation method thereof

Abstract

The invention relates to a crystalline silicon solar cell with low series resistor, which comprises a p-n node; a passivation layer, a thin grating metal electrode and a main grating metal electrode are arranged on the front surface of the p-n node, and a back electric field and a back electrode are arranged on the back surface of the p-n node; the thin grating metal electrode, the main grating metal electrode, the back electric field and the back electrode are communicated with the p-n node; and a transparent conducting film is arranged on the full or partial area of the front surface of the crystalline silicon solar cell. The solar cell has a structure having the transparent conducting film, the metal electrodes and the passivation layer, wherein the transparent conducting film can be used for connecting breaking gates so as to reduce the power loss of the breaking gates; the film can reduce the series resistor on the front surface of the cell and enhance the conducting capability of the cell; simultaneously, the crystalline silicon solar cell can play a role in protecting the metal electrode on the front surface of the cell and prevent the metal electrode from oxidizing; and the reflectivity and the color of the crystalline silicon solar cell can be further controlled by adjusting and controlling the transparent conducting film. The invention further discloses a preparation method of the crystalline silicon solar cell.

Description

technical field

[0001] The invention belongs to the technical field of solar cells, and in particular relates to a crystalline silicon solar cell with low series resistance and a preparation method thereof. Background technique

[0002] At present, the conventional process of preparing crystalline silicon solar cells generally uses screen printing to prepare metal electrodes. During the printing process, the screen may be blocked due to reasons such as too large slurry particles, too long residence time, or aging of the screen, so that metal electrodes, especially The fine grid line metal electrode (finger) is incomplete, forming a broken grid. Meanwhile, the metal electrodes sit on top of crystalline silicon solar cells and are prone to oxidation without any protection.

[0003] In order to reduce the shielding of light by the electrodes, the design of high-efficiency cells puts forward higher requirements on the width of the fine-grid electrodes. However, the reduction o...

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