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PHOTOVOLTAIC (PV) ENHANCEMENT FILMS FOR ENHANCING OPTICAL PATH LENGTHS AND METHODS OF MANUFACTURING PV ENHANCEMENT FILMS
PHOTOVOLTAIC (PV) ENHANCEMENT FILMS FOR ENHANCING OPTICAL PATH LENGTHS AND METHODS OF MANUFACTURING PV ENHANCEMENT FILMS
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机译:用于增强光路长度的光电(PV)增强膜和制造PV增强膜的方法
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摘要
A method for manufacturing a photovoltaic (PV) enhancement film. The method includes providing an extrusion device with an embossing roller engraved to have a pattern corresponding to a set of absorption enhancement structures. The method includes feeding a web of substantially transparent material, such as an UV-stabilized blend of polycarbonate or acrylic. The method includes rolling the embossing roller against a first side of the web to form the absorption enhancement structures. The absorption enhancement structures each include a light receiving surface that directs at least a portion of light that passes through a second side of the web toward the first side back toward the second side (e.g., the structures may be configured to provide total internal reflection when applied to a PV device). The structures refract incident light to provide an average path length ratio of greater than about 1.10 in the PV device.
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