Crystalline silicon solar cell, preparation method and cell module

Abstract

According to the invention, a dielectric layer and a conductive layer are arranged on one side of a conventional battery main body, so after the conductive layer has the preset potential, a potentialdifference exists between the conductive layer and a first electrode, and the potential difference is introduced to the vicinity of a silicon wafer substrate through the dielectric layer, thereby forming electric field passivation on the surface of the silicon wafer substrate and enhancing an electrostatic field formed on the surface of the silicon wafer; and the conversion efficiency of the battery is improved under the condition that the main body structure of the battery is not greatly changed, such as through hole arrangement and the like.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a crystalline silicon solar cell, a preparation method and a cell module. Background technique [0002] With the continuous consumption of traditional energy and its negative impact on the environment, solar energy, as a pollution-free and renewable energy, has been developed and utilized rapidly, especially solar cells with high conversion efficiency have become the focus of current research. [0003] At present, the Passivated Emitter and Rear Cell (PERC) technology with higher conversion efficiency uses a passivation layer such as aluminum oxide prepared on the back of the battery to form an electrostatic field on the surface of the silicon wafer to repel the silicon wafer. The internal non-equilibrium carriers are close to the surface of the silicon wafer, reducing the concentration of non-equilibrium carriers on the surface of the silicon wafer, thereby reducing the recombination...

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Problems solved by technology

[0004] However, in the current scheme, in the process of enhancing the electrostatic field formed on the surface of the silicon wafer by applying an electric field to the PERC battery and improving the conversion efficiency of the PERC battery, it is necessary to set up large holes such as through holes in the main structure of the PERC battery. Changes, thereby affecting the efficiency of the main body of the PERC cell to absorb sunlight through the photovoltaic effect to generate carriers, resulting in a decrease in the conversion efficiency of crystalline silicon solar cells

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