Abstract Renewable sources of energy, such as solar cells, stand out as promising sustainable alternatives, given the growing world energy demand. The crystalline silicon photovoltaic (PV) modules are the most used in the conversion of solar energy into electricity. These modules are subject to weather conditions that may cause degradation of the ethylene vinyl acetate copolymer (EVA) encapsulant (cross-linked EVA copolymer), affecting the efficiency, stability and service life of the PV conversion. In this work, the development of an encapsulant was performed, based on the addition of graphene oxide (GO) to EVA encapsulant forming the nanocomposite (EVA/GO), in order to improve the stabilization against photodegradation. Nanocomposites with GO concentrations wt. %: 0.25%, 0.50%, 0.75%, 1.0% and 2.0% were characterized by: Fourier transform infrared spectroscopy by attenuated total reflectance (ATR-FTIR) thermogravimetry (TG), and differential scanning calorimetry (DSC), before and after they underwent accelerated aging processes in Weather-Ometer and UVB rays chambers. In general, the addition of GO minimized EVA encapsulant degradation. Only the encapsulant with GO concentration of 0.25 wt% was shown as promising for photovoltaic modules, since the transparency of the films with higher concentrations was impaired.

中文翻译：

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用于晶体硅光伏组件的乙烯-醋酸乙烯共聚物/氧化石墨烯纳米复合材料的开发

摘要 考虑到不断增长的世界能源需求，可再生能源，如太阳能电池，作为有前景的可持续替代能源脱颖而出。晶体硅光伏 (PV) 模块最常用于将太阳能转化为电能。这些组件受到天气条件的影响，可能会导致乙烯醋酸乙烯酯共聚物 (EVA) 密封剂（交联 EVA 共聚物）降解，从而影响光伏转换的效率、稳定性和使用寿命。在这项工作中，基于将氧化石墨烯 (GO) 添加到形成纳米复合材料 (EVA/GO) 的 EVA 密封剂中，进行了密封剂的开发，以提高对光降解的稳定性。具有 GO 浓度 wt 的纳米复合材料。%：0.25%、0.50%、0.75%、1.0%和2.0%的特征在于：通过衰减全反射 (ATR-FTIR) 热重法 (TG) 和差示扫描量热法 (DSC) 进行傅里叶变换红外光谱，在它们在 Weather-Ometer 和 UVB 射线室中经历加速老化过程之前和之后。一般而言，添加 GO 可最大限度地减少 EVA 密封剂的降解。只有 GO 浓度为 0.25 wt% 的密封剂被证明可用于光伏模块，因为较高浓度的薄膜的透明度会受到损害。