A highly abrasive-resistant, long-lasting anti-reflective coating for PV module glass
A highly abrasive-resistant, long-lasting anti-reflective coating for PV module glass
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用于光伏组件玻璃的高度耐磨、持久的抗反射涂层
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Peter R. Gonsalves
中科院分区：
文献类型：
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作者：
S. Pop;Venkata Abbaraju;B. Brophy;Y. Yang;Sina Maghsoodi;Peter R. Gonsalves
超过4%的入射光从光伏（PV）模块的前盖板玻璃反射。在整个行业范围内，以具有成本效益的方式提高光伏组件的效率的趋势推动了抗反射涂层（ARC）玻璃的广泛采用。这些抗反射（AR）涂层最常见的沉积方法是湿溶胶-凝胶工艺，少数玻璃制造商使用真空溅射。大多数商业溶胶-凝胶涂层由单层多孔二氧化硅组成，并且在很宽的太阳光谱范围内具有高度透射性。这些涂层的机械强度通常来自玻璃回火期间的高温处理。然而，随着光伏行业越来越关注项目平准化电力成本（LCOE），光伏组件制造商和系统所有者正在寻求具有更高耐久性和长期性能的ARC玻璃，特别是用于在中等至高污染环境中运行的系统，其中光伏组件受到空气颗粒磨损和反复洗涤。在这项工作中，我们报告了一种新的，低温可固化的溶胶-凝胶AR涂层的耐久性测试结果从恩基技术，显示出显着改善的耐磨性相比，更传统的AR涂层。新涂层比传统涂层更致密，并且在相对较低的工艺温度下化学获得其耐磨性，而不会牺牲光学性能。本工作中的受试样品按照EN 1096.2中的行业标准磨损测试方法和IEC 61215中的加速环境测试程序进行了广泛的测试。我们的研究结果表明，新涂层的涂层寿命延长，比具有可比光学性能的现有涂层长四倍。这种增加的机械强度直接转化为降低制造和安装过程中的处理风险、降低O&M成本、增加能源产量和降低保修成本。
More than 4% of incident light is reflected from the front cover glass of photovoltaic (PV) modules. The industry-wide trend to cost-effectively increase the efficiency of PV modules has driven the widespread adoption of anti-reflective coated (ARC) glass. The most common deposition methods for these anti-reflective (AR) coatings are wet sol-gel processes, with a small minority of glass manufacturers using vacuum-based sputtering. Most commercial sol-gel coatings consist of single layer porous silica and are highly transmissive across a broad range of the solar spectrum. The mechanical strength of these coatings is generally derived from high temperature treatment during the tempering of the glass. However, as the PV industry increasingly focuses on project levelized cost of electricity (LCOE), PV module manufactures and system owners are seeking ARC glass with increased durability and long-term performance, particularly for systems operating in medium to high soiling environments, where PV modules are subjected to airborne particle abrasion and repeated washing. In this work, we report durability test results for a new, low temperature curable sol-gel AR coating from Enki Technology, showing significantly improved abrasion-resistance compared to more traditional AR coatings. The new coating is denser than the traditional coatings and chemically derives its abrasion-resistance at relatively low process temperatures without sacrificing the optical performance. The samples under test in this work were subjected to extensive testing following the industry-standard abrasion test method in EN1096.2 and accelerated environmental test procedures in IEC61215. Our results show increased coating longevity for the new coating, up to four times greater than existing coatings with comparable optical performance. This increased mechanical strength directly translates to reduced risk of handling during manufacturing and installation, lower O&M costs, increased energy yield and reduced warranty costs.