Solar cell and method of manufacturing the same, photovoltaic module

By introducing a first doped semiconductor layer and a first doped source layer into the solar cell, and optimizing the doping concentration and thickness, the problem of low conversion efficiency of tunnel oxide passivation contact cells was solved, achieving higher conversion efficiency and lower fabrication cost.

CN122458538APending Publication Date: 2026-07-24TRINA SOLAR CO LTD
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Patent Information

Authority / Receiving Office
CN Ā· China
Patent Type
Applications(China)
Current Assignee / Owner
TRINA SOLAR CO LTD
Filing Date
2026-04-03
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The conversion efficiency of existing tunneling oxide passivated contact cells needs to be improved, mainly because the damage to the tunneling layer during the annealing process of the doped polycrystalline silicon layer leads to a decrease in carrier transport characteristics.

Method used

By introducing a first doped semiconductor layer and a first doped source layer into a solar cell, and using annealing to diffuse the doped element into the intrinsic semiconductor layer, the path of the doped element to the tunneling layer is extended, reducing damage to the tunneling layer. Furthermore, carrier transport is optimized by controlling the doping concentration and thickness.

Benefits of technology

This improved the conversion efficiency of solar cells, reduced damage to the tunneling layer, decreased the material consumption of dopant elements, and lowered the manufacturing cost.

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Abstract

The application relates to a solar cell, a preparation method thereof and a photovoltaic module. The solar cell comprises a semiconductor substrate, a tunneling layer arranged on one side of the semiconductor substrate, a first doped semiconductor layer arranged on the side, away from the semiconductor substrate, of the tunneling layer, the first doped semiconductor layer being doped with a first doping element, a first doping source layer arranged on the side, away from the semiconductor substrate, of the first doped semiconductor layer, the first doping source layer being doped with the first doping element, and the doping concentration of the first doping element in the first doped semiconductor layer being greater than the doping concentration of the first doping element in the first doping source layer. Therefore, the solar cell, the preparation method thereof and the photovoltaic module provided by the application can improve the conversion efficiency of the solar cell.
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