Back-contact solar cell and its manufacturing method, photovoltaic assembly
The back-contact solar cell design with alternating doping regions and connecting layers addresses the hot spot effect in IBC cells, improving efficiency and yield by reducing carrier recombination and leakage currents.
JP7843424B1Pending Publication Date: 2026-04-09ZHEJIANG JINKO SOLAR CO LTD
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Patent Information
- Application Number
- JP2026015419
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2025-03-28
- Filing Date
- 2026-02-02
- Publication Date
- 2026-04-09
- Estimated Expiration
- 2045-10-20
AI Technical Summary
Technical Problem
IBC cells experience a hot spot effect due to localized temperature increases caused by shading and defects, which can lead to safety issues and reduced power output in photovoltaic assemblies.
Method used
A back-contact solar cell design with alternating doping regions, passivation contact layers, and a connecting layer that forms both indirect and direct leakage current paths, reducing carrier recombination and limiting leakage current paths to improve photoelectric conversion efficiency and mitigate the hot spot effect.
Benefits of technology
The design enhances the photoelectric conversion efficiency and yield of photovoltaic assemblies by minimizing the hot spot effect while maintaining efficiency, ensuring balanced leakage current and electric field distribution.
✦ Generated by Eureka AI based on patent content.
Abstract
Embodiments of the present application relate to the field of photovoltaic power generation and provide a back-contact solar cell, a method for manufacturing the same, and a photovoltaic power generation assembly. The back-contact solar cell includes a substrate and alternately arranged first doping regions and second doping regions, a first passivation contact layer located in the first doping region and a second passivation contact layer located in the second doping region, a doping oxide layer including a first portion located on the surface of the first passivation contact layer and a second portion located in the second doping region, and a connecting layer located in a portion of the first portion, surrounding a portion of the second portion and electrically connected to the second passivation contact layer, and located on the side surface of the first passivation contact layer and electrically connected to the first passivation contact layer. According to the back-contact solar cell provided by embodiments of the present application, at the very least, the hot spot effect can be improved and the photoelectric conversion efficiency can be improved.
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