Solar cell and preparation method

Abstract

The invention provides a solar cell and a preparation method, and relates to the technical field of solar photovoltaics. The solar cell includes: a crystalline silicon substrate; an emitting electrodedeposited on the front surface of the crystalline silicon substrate; a front anti-reflection layer deposited on the front surface of the emitting electrode; a front metal electrode which comprises aplurality of main grid lines and a plurality of fine grid lines, wherein the fine grid lines comprise a plurality of grid line points and a plurality of conduction grid lines used for conducting the grid line points, and the grid line points are made of silver paste penetrating through the front antireflection layer; the grid line points penetrate through the front anti-reflection layer and are incontact with the emitting electrode; the conduction grid lines are arranged on the front surface of the front surface anti-reflection layer and do not penetrate through the front surface anti-reflection layer; the conduction grid lines are made of non-penetrable silver paste. According to the invention, the cost of the solar cell is reduced, the passivation effect is improved, the carrier coincidence is reduced, the photoelectric conversion efficiency is improved, and the current collection is facilitated.

Description

technical field [0001] The invention relates to the field of solar photovoltaic technology, in particular to a solar cell and a preparation method. Background technique [0002] Solar cells can reduce the impact on the environment, so they have a wide range of applications. At present, each sub-grid in the solar cell is made of silver paste capable of penetrating the front anti-reflection layer to collect current. [0003] However, due to the high cost of silver paste penetrating the front anti-reflection layer, and the complicated process of making auxiliary grid lines with silver paste penetrating the front anti-reflection layer, the consumption of silver paste penetrating the front anti-reflection layer is large, resulting in a At the same time, the above-mentioned silver paste that penetrates the front anti-reflection layer usually corrodes the front anti-reflection layer and forms an ohmic contact with the crystalline silicon substrate, which not only reduces the passi...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a solar cell and its preparation method, a solar cell and its preparation method production method, a solar cell and its preparation method production equipment, and a computer-readable storage medium, aiming to solve the problem of high solar cell cost and photoelectric conversion efficiency. low problem

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