用於柔性透明導體應用的聚對苯二甲酸乙二醇酯基材上的 ZTO/Ag/ZTO 塗層的耐候性和材料表徵

Abstract

摘要 柔性透明導電塗層已被用於能源相關應用的許多新型光電裝置。由氧化物/金屬/氧化物（縮寫為OMO）層組成的層壓塗層是有前途的氧化銦錫（ITO）替代材料。然而， OMO樣品（包括層壓OMO塗層和聚合物基材）的耐用性和耐候性會影響相關光電元件和裝置的性能，因此有必要透過耐候性來研究測試光電和機械性能的退化機制。在這項研究中，對由聚對苯二甲酸乙二醇酯(PET)基材上ZTO/Ag/ZTO塗層組成的商用 OMO樣品進行室內加速和室外老化測試，研究紫外線(UV)輻射、高溫和機械彎曲等環境壓力因素對OMO樣品降解行為的影響進行全面的材料表徵，包括紫外-可見光譜、四點探針、拉伸測試和拉曼光譜。OMO塗層在耐候性測試中表現優異，而PET基材在長期耐候下會發生脆化，因此脆化的PET基材會損害OMO塗層的機械柔韌性和可彎曲性。這項研究結果提供對銀基OMO柔性透明導電材料的耐久性和耐候性的深入了解。

Abstract Flexible transparent conductive coatings have been employed in many new optoelectronic devices for energy-related applications. Laminated coatings composed of oxide/metal/oxide (OMO) layers are promising alternatives to indium tin oxide (ITO). However, the durability and weather resistance of OMO samples, including the laminated OMO coatings and polymer substrates, affect the performance of related optoelectronic devices and components. Therefore, it is crucial to study the degradation mechanisms of these coatings through weathering to test their optoelectronic and mechanical performance. In this study, commercial OMO samples consisting of ZTO/Ag/ZTO coatings on polyethylene terephthalate (PET) substrates were subjected to indoor accelerated and outdoor aging tests. The effects of environmental stress factors, such as ultraviolet (UV) radiation, high temperature, and mechanical bending, on the degradation behavior of OMO samples were comprehensively characterized using ultraviolet-visible spectroscopy, four-point probe measurements, tensile testing, and Raman spectroscopy. The OMO coatings demonstrated excellent weather resistance in the tests, while the PET substrates became brittle under prolonged weathering conditions. Consequently, the brittleness of the PET substrates compromised the mechanical flexibility and bendability of the OMO coatings. These findings provide a deep understanding of the durability and weather resistance of silver-based OMO flexible transparent conductive materials.