Back-Contact Solar Cell Support Layer for Scratch-Free Transfer
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Solution Overview
Problem
The front surface of back-contact solar cells is vulnerable to scratches during transfer due to direct contact with a transfer table, affecting the appearance and performance of the solar cell.
Innovation Solution
A transparent support layer with evenly distributed transparent bumps is applied to the front surface of the back-contact solar cell, providing partial coverage and support to prevent scratches while maintaining high light transmittance and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the front surface of back-contact solar cells is directly transferred without protection, then the transfer process is simple and efficient, but the front surface is vulnerable to scratches affecting appearance and performance
Solution Approach 1:
A transparent support layer with transparent bumps is applied to the front surface of the back-contact solar cell. This thin film structure provides protective function while maintaining transparency and minimizing impact on light transmission. The support layer acts as a flexible protective shell that prevents direct contact between the front surface and transfer tables during manufacturing processes.
Solution Approach 2:
The transparent support layer serves as an intermediary element between the front surface of the solar cell and external objects (transfer tables, handling equipment). This mediator provides mechanical support and protection during transfer operations, preventing scratches and damage while allowing light to pass through to the solar cell surface.
2Reliability
If a transparent support layer with transparent bumps is applied to the front surface, then protection from scratches is improved, but light transmittance may be affected
Solution Approach 1:
The support layer is designed with transparent bumps that are locally distributed on the front surface rather than forming a continuous layer. This local quality approach provides protection only where needed (at bump locations) while maintaining open areas for light transmission. The bumps are strategically positioned to offer mechanical support without creating large-scale obstructions to light paths.
Solution Approach 2:
The support layer and transparent bumps are designed to be optically transparent, matching the optical properties of the surrounding environment as much as possible. By using transparent materials with appropriate optical characteristics, the support structure becomes visually and optically inconspicuous, minimizing light absorption and reflection while maintaining protective function.
Data Source
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AI summary
The present disclosure provides a back-contact photovoltaic module and a manufacturing method thereof. The back-contact photovoltaic module includes a glass substrate, an upper adhesive film layer, a solar cell layer, a lower adhesive film layer, and a back sheet arranged in sequence from top to bottom. The solar cell layer includes back-contact solar cells, and a front surface of each of the back-contact solar cells is provided with a transparent support layer. The transparent support layer protrudes from a surface of the back-contact solar cell, and the transparent support layer covers a partial region of the front surface. According to the present disclosure, the front surface of the back-contact solar cell can be protected, and a risk of scratches to the back-contact photovoltaic module can be reduced.