A solar cell and a method of manufacturing the same

By setting multiple laser contact areas on the front side of the silicon substrate of the solar cell and combining low-temperature boron diffusion and laser crystallization, the problems of recombination surge and high contact resistance caused by high-temperature oxidation treatment are solved, thereby improving photoelectric conversion efficiency and light absorption efficiency.

CN122227720APending Publication Date: 2026-06-16CHUZHOU JIETAI NEW ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHUZHOU JIETAI NEW ENERGY TECH CO LTD
Filing Date
2026-01-14
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing solar cell fabrication processes suffer from problems such as a surge in surface recombination, a decrease in on-state voltage, poor doping uniformity, and high contact resistance caused by high-temperature post-oxidation treatment, which affect photoelectric conversion efficiency.

⚗Method used

Gradient crystallization is employed, which involves setting multiple laser contact areas on the front side of the silicon substrate, combining low-temperature boron diffusion and laser crystallization to form a gradient crystallization rate, reduce the contact resistance of the metal gate line, and form a groove structure in the third laser contact area to increase the optical path length.

🎯Benefits of technology

It improves the photoelectric conversion efficiency of solar cells, reduces contact resistance and increases the light absorption path length, optimizes the process flow, and reduces damage from high-temperature and high-energy lasers.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to the technical field of solar cells, and particularly discloses a solar cell and a preparation method thereof. The solar cell comprises a silicon substrate, the silicon substrate comprises a front surface and a back surface, the front surface comprises a first laser contact area, a second laser contact area and a third laser contact area, the first laser contact area and the third laser contact area are alternately and spacedly arranged on the front surface of the silicon substrate; the second laser contact area and the first laser contact area are overlapped in a vertical direction, the width of the second laser contact area is smaller than that of the first laser contact area, the front surface further comprises a front surface metal electrode, the front surface metal electrode is in contact with the second laser contact area, and the crystallization rate of the second laser contact area is higher than that of a non-overlapping area in the first laser contact area. The solar cell has the advantages that the contact resistance of the metal grid line is reduced through gradient crystallization treatment, filling gain is brought, and the photoelectric conversion efficiency of the solar cell is further improved.
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