Solar cell and manufacturing method therefor, conductive device and laser-assisted sintering apparatus

By applying a bias voltage related to the conductivity resistance to the solar cell for laser-assisted sintering, the problems of high contact resistance and over- or under-burning of the grid lines are solved, resulting in higher conversion efficiency and better contact performance.

WO2026118444A1 Publication Date: 2026-06-11TRINA SOLAR CO LTD
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Patent Information

Application Number
PCT/CN2025/107292
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-12-05
Filing Date
2025-07-07
Publication Date
2026-06-11

AI Technical Summary

Technical Problem

In existing technologies, the contact resistance between the surface electrode and the back electrode of a solar cell is high, which limits the cell conversion efficiency. Furthermore, the LECO process is prone to over-burning or under-burning of the grid lines, affecting the contact effect.

Method used

A grid pattern is formed on the solar cell, and a corresponding bias voltage is applied according to the conductivity resistance of each sub-grid line for laser-assisted sintering. By controlling the positive correlation between the bias voltage and the conductivity resistance, over-burning or under-burning is reduced, ensuring that each sub-grid line forms good contact with the semiconductor layer.

Benefits of technology

This improves the conversion efficiency of solar cells, ensures uniform contact between the sub-grid lines and the semiconductor layer, reduces contact resistance, and enhances cell performance.

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Abstract

The present application relates to a solar cell and a manufacturing method therefor, a conductive device, and a laser-assisted sintering apparatus. The manufacturing method for a solar cell comprises: forming a grid line pattern on a cell body, wherein the grid line pattern comprises N fingers arranged in parallel and spaced apart, and N is an integer greater than or equal to 2; applying a bias voltage to the N fingers, wherein the bias voltage on each finger is positively correlated with its conductive resistance; and performing a laser-assisted sintering process on the N fingers.
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