Inverted pyramid auxiliary texturing additive and application thereof

Abstract

The invention discloses an inverted pyramid auxiliary texturing additive and application thereof. The inverted pyramid auxiliary texturing additive comprises the following main components: silver ions, sodium citrate, fluosilicic acid, ethylenediamine tetraacetic acid and the balance of water. The inverted pyramid texturing liquid provided by the invention contains an acidic texturing liquid and the inverted pyramid auxiliary texturing additive. According to the silicon wafer texturing method provided by the invention, the inverted pyramid texturing liquid is used for texturing the surface ofthe silicon wafer to obtain an inverted pyramid textured structure; and by adding the inverted pyramid auxiliary texturing additive into texturing liquid, reaction can be accelerated, raising points are increased, the influence of diamond wire cutting line marks on inverted pyramid texturing is effectively eliminated, and a more uniform and dense inverted pyramid textured structure is obtained, sothat the reflectivity is reduced, the battery efficiency is improved, and the inverted pyramid auxiliary texturing additive is beneficial to wide popularization and application.

Description

technical field [0001] The invention belongs to the technical field of texturing additives, in particular to an inverted pyramid auxiliary texturing additive and its application. Background technique [0002] Cost reduction and efficiency increase have always been the eternal theme of the photovoltaic industry. In order to improve the performance and efficiency of crystalline silicon solar cells, it is necessary to make a textured surface on the surface of the crystalline silicon wafer. The effective textured structure can make the incident sunlight reflect and refract multiple times on the surface of the silicon wafer, which not only significantly reduces the The reflectivity of the battery, and changing the direction of incident light in silicon, prolongs the optical path, thereby increasing the absorption rate of silicon wafers for infrared light. [0003] Among them, the inverted pyramid suede structure has become the new darling of the photovoltaic industry due to its ...

AI Technical Summary

Problems solved by technology

However, compared with the mortar slicing, the diamond wire slicing has serious cutting line marks, and the amorphous silicon layer on the surface of the slicing silicon slice will seriously affect the catalytic ability of copper, making the final inverted pyramid structure easy to merge, and the inverted pyramid structure merged The place is often densely populated with spikes, and it is a serious leakage center after being prepared into a battery.

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