Towards Polymer-Free, Femto-Second Laser-Welded Glass/Glass Solar Modules

IF 2.5 3区工程技术 Q3 ENERGY & FUELS

IEEE Journal of Photovoltaics Pub Date : 2024-02-21 DOI:10.1109/JPHOTOV.2024.3364823

David L. Young;Timothy J. Silverman;Nicholas P. Irvin;Daniel Huerta-Murillo;Bill Holtkamp;Nick Bosco

引用次数: 0

Abstract

This article explores the use of femtosecond (fs) lasers to form glass-to-glass welds for hermetically sealed, polymer-free solar modules. Low-iron solar glass coupons were welded together without the use of glass filler using a fs laser with dedicated optics to elongate the focal plane parallel to the incident beam. The resulting welds were then stress tested to failure to reveal the critical stress intensity factor, K_Ic . These values were used in a structural mechanics model of a 1 m × 2 m glass/glass module under a simulated static load test. The results show that the fs laser welds are strong enough for a suitably framed module to pass the IEC 61215 static load test with a load of 5400 Pa. Key to this finding is that the module must be framed and braced, and the glass must be ribbed to allow pockets for the cells and welds inside the border of the module. The result is a module design that is completely polymer free, hermetically sealed, has improved thermal properties, and is easily recycled.

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实现无聚合物、飞秒激光焊接玻璃/玻璃太阳能模块

本文探讨了如何利用飞秒（fs）激光形成玻璃对玻璃的焊缝，用于密封的无聚合物太阳能模块。在不使用玻璃填料的情况下，使用带有专用光学器件的飞秒激光将低铁太阳能玻璃试样焊接在一起，以拉长平行于入射光束的焦平面。然后对焊缝进行失效应力测试，以揭示临界应力强度因子 KIc。这些数值被用于 1 m × 2 m 玻璃/玻璃模块在模拟静载荷测试下的结构力学模型。结果表明，fs 激光焊缝的强度足以让框架合适的模块通过 IEC 61215 静态负载测试，负载为 5400 Pa。这一结果的关键在于，模块必须有框架和支撑，玻璃必须有棱纹，以便在模块边界内为电池片和焊缝留出空间。因此，这种模块设计完全不含聚合物，密封性好，热性能更佳，而且易于回收利用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Journal of Photovoltaics ENERGY & FUELS-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.00

自引率

10.00%

发文量

206

期刊介绍： The IEEE Journal of Photovoltaics is a peer-reviewed, archival publication reporting original and significant research results that advance the field of photovoltaics (PV). The PV field is diverse in its science base ranging from semiconductor and PV device physics to optics and the materials sciences. The journal publishes articles that connect this science base to PV science and technology. The intent is to publish original research results that are of primary interest to the photovoltaic specialist. The scope of the IEEE J. Photovoltaics incorporates: fundamentals and new concepts of PV conversion, including those based on nanostructured materials, low-dimensional physics, multiple charge generation, up/down converters, thermophotovoltaics, hot-carrier effects, plasmonics, metamorphic materials, luminescent concentrators, and rectennas; Si-based PV, including new cell designs, crystalline and non-crystalline Si, passivation, characterization and Si crystal growth; polycrystalline, amorphous and crystalline thin-film solar cell materials, including PV structures and solar cells based on II-VI, chalcopyrite, Si and other thin film absorbers; III-V PV materials, heterostructures, multijunction devices and concentrator PV; optics for light trapping, reflection control and concentration; organic PV including polymer, hybrid and dye sensitized solar cells; space PV including cell materials and PV devices, defects and reliability, environmental effects and protective materials; PV modeling and characterization methods; and other aspects of PV, including modules, power conditioning, inverters, balance-of-systems components, monitoring, analyses and simulations, and supporting PV module standards and measurements. Tutorial and review papers on these subjects are also published and occasionally special issues are published to treat particular areas in more depth and breadth.