Light and durable: Composite structures for building‐integrated photovoltaic modules,Progress in Photovoltaics

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Light and durable: Composite structures for building‐integrated photovoltaic modules
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2018-04-16 , DOI: 10.1002/pip.3009
Ana C. Martins ₁ , Valentin Chapuis ₂ , Fanny Sculati-Meillaud , Alessandro Virtuani ₁ , Christophe Ballif _{1,

2}

Affiliation

In several countries, building‐integrated photovoltaics solutions could prospectively contribute to the growth of total installed photovoltaic (PV) capacity as they enable electricity production with minimal impact on free land. However, in some circumstances, the relatively high weight (≥15 kg/m²) of existing glass/glass building‐integrated photovoltaics modules may constitute a barrier to the diffusion of PV in the built environment. With the aim of limiting the weight while preserving excellent mechanical stability and durability properties, we propose a new design for lightweight crystalline‐silicon (c‐Si) PV modules in which the conventional polymer backsheet (or glass) is replaced by a composite sandwich structure, and the frontsheet by a transparent polymer foil. Since sandwich structures are generally realized using epoxy as a gluing material, requiring long processing times, we further investigate (1) the possibility of using standard polymers used in the solar industry as alternative adhesives in the sandwich and (2) the possibility to considerably simplify manufacturing, using conventional lamination processes. Mini‐modules are produced, characterized, and submitted to accelerated aging tests (thermal cycling and damp‐heat) to assess the stability of the product against environmental degradation. We show that, by using the reference epoxy adhesive, it is possible to manufacture a lightweight (~5 kg/m²) mini‐module in a 2‐step process, which successfully passes a selection of industry qualification tests, including thermal cycling, damp‐heat, and hail test. We further show that, by replacing epoxy by a PV adhesive, we are able to considerably simplify the manufacturing process, while preserving excellent mechanical and durability properties.

中文翻译：

轻便耐用：用于建筑物集成光伏模块的复合结构

在一些国家，建筑集成的光伏解决方案有望使总装机光伏（PV）容量增长，从而使电力生产对自由土地的影响降到最低。但是，在某些情况下，相对较高的重量（≥15 kg / m ²）现有的玻璃/玻璃建筑集成光伏模块可能会阻碍光伏在建筑环境中的扩散。为了在保持重量的同时保留出色的机械稳定性和耐用性，我们提出了一种新的轻型晶体硅（c-Si）PV组件设计，其中，传统的聚合物背板（或玻璃）被复合夹层结构代替，和前片由透明的聚合物箔制成。由于通常使用环氧树脂作为粘合材料来实现夹层结构，需要较长的处理时间，因此我们进一步研究（1）在太阳能工业中使用标准聚合物作为夹层材料的替代粘合剂的可能性，以及（2）显着简化的可能性制造，使用常规的层压工艺。微型模块的生产，表征和经受加速老化测试（热循环和湿热），以评估产品对环境退化的稳定性。我们表明，通过使用参考环氧胶粘剂，可以制造出重量轻（〜5 kg / m²）通过两步过程的微型模块，该过程成功通过了一系列行业认证测试，包括热循环，湿热和冰雹测试。我们进一步表明，通过用PV粘合剂代替环氧树脂，我们能够大大简化制造过程，同时保留出色的机械性能和耐用性。

更新日期：2018-04-16

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