Abstract The property changes of polymeric films upon degradation are important to develop strategies to prolong the device lifetimes. In this regard, we investigated the effects of ultraviolet-ozone (UVO) treatment on the electronic structures of poly (9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT) and poly (9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) films. We found that as the UVO treatment time increased, the intensities of the UV–vis and photoluminescence spectra of both F8BT and PFO films exponentially decayed owing to the destruction of the conjugated system of the films. As per the X-ray photoelectron spectra, both the F8BT and PFO films showed significant oxidation and p-doping effects upon UVO treatment. In addition, UVO treatment caused the etching of the polymeric films, and their thickness gradually decreased; the etching rate with UVO treatment was faster for PFO than for F8BT. These results indicate that the functionalization of polymers with UVO treatment requires the careful consideration of the resulting changes in their electronic structure.

中文翻译：

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UV-臭氧处理对F8BT和PFO聚合物薄膜电子结构的影响

摘要 降解后聚合物薄膜的性能变化对于制定延长器件寿命的策略很重要。在这方面，我们研究了紫外线臭氧 (UVO) 处理对聚 (9,9-二辛基芴-alt-苯并噻二唑) (F8BT) 和聚 (9,9-二正辛基芴基-2) 电子结构的影响。 ,7-diyl) (PFO) 薄膜。我们发现随着 UVO 处理时间的增加，由于薄膜共轭体系的破坏，F8BT 和 PFO 薄膜的 UV-vis 和光致发光光谱的强度呈指数衰减。根据 X 射线光电子谱，F8BT 和 PFO 薄膜在 UVO 处理后均显示出显着的氧化和 p 掺杂效应。此外，UVO处理引起聚合物薄膜的蚀刻，其厚度逐渐减小；与 F8BT 相比，PFO 的 UVO 处理蚀刻速率更快。这些结果表明，用 UVO 处理聚合物的功能化需要仔细考虑其电子结构的变化。