Solar cell and photovoltaic module
By employing a double antireflection layer structure design on the surface of solar cells, adjusting the refractive index difference and material combination, the problems of blue edges and color inhomogeneity were solved, thereby improving the color uniformity and light absorption efficiency of solar cells.
WO2026119082A1 Publication Date: 2026-06-11LONGI GREEN ENERGY TECH CO LTD
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Patent Information
- Application Number
- PCT/CN2025/139076
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-11-13
- Filing Date
- 2025-12-01
- Publication Date
- 2026-06-11
AI Technical Summary
Technical Problem
Existing solar cells have problems such as obvious blue edges, uneven surface color, and significant markings.
Method used
The design employs a double antireflective layer structure. By adjusting the refractive index difference between the first and second antireflective layers to satisfy a specific relationship, a refractive index gradient structure is formed. Combined with rare earth elements and transition metal compound materials, the thickness difference is optimized to achieve color uniformity and aesthetics.
Benefits of technology
It effectively weakens or eliminates blue edge phenomena and spot marks, improves the color uniformity and aesthetics of solar cell surfaces, and enhances light absorption efficiency and cell efficiency.
✦ Generated by Eureka AI based on patent content.
Abstract
Provided in the present application are a solar cell and a photovoltaic module. The solar cell comprises a silicon wafer and an anti-reflective structure, wherein the anti-reflective structure comprises a first anti-reflective coating disposed on a surface of the silicon wafer and a second anti-reflective coating disposed on a surface of the first anti-reflective coating. The refractive index of the first anti-reflective coating is n1, and the refractive index of the second anti-reflective coating is n2, n1 and n2 satisfying one of the following relationships: (a) -0.4≤n2-n1≤-0.05; and (b) 0.1≤n2-n1≤0.4. On the basis of the design of a dual-anti-reflective-coating structure and the difference between the refractive indexes of the two anti-reflective coatings being within the above range, the dual-anti-reflective-coating structure as a whole has a stronger color-tuning effect. When there is a certain difference between the thickness of the edge of the cell and the thickness of the center of the cell, the colors of the edge and center of the cell remain consistent within a wider thickness range, and the colors of a contact point region and the other regions also remain consistent within the wider thickness range, such that the blue edge phenomenon and contact point marks are weakened or even completely masked, thereby improving the color uniformity and aesthetics of a surface of the solar cell.
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