The active region of organic thin film transistors (OTFTs) is usually sensitive to moisture and O₂ in the air ambient, which hinders their practical applications. In this study, the effects of air ambient on characteristics of unpassivated 2,8-difluoro-5,11-bis (triethylsilylethynyl) anthradithiophene (dif-TES-ADT) OTFTs are clarified. The device is much more sensitive to H₂O vapor than O₂, although both of which cause TFT instability. To improve the environmental stability, inkjet-printed passivation of the fluoropolymer CYTOP and UV curing adhesive are compared. It is found that the CYTOP passivation is well compatible with the organic channel while the UV curing adhesive has excellent barrier ability to both H₂O vapor and O₂. Then CYTOP/UV adhesive bilayer passivation combining advantages of both materials is introduced to achieve stable operation of OTFTs, which can resist saturated H₂O vapor and O₂ for 25 days.

中文翻译：

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双层钝化稳定的 diff-TES-ADT 有机薄膜晶体管

有机薄膜晶体管（OTFT）的有源区通常对空气环境中的水分和O ₂敏感，这阻碍了它们的实际应用。在这项研究中，阐明了空气环境对未钝化的 2,8-二氟-5,11-双（三乙基甲硅烷基乙炔基）蒽二噻吩（dif-TES-ADT）OTFT 特性的影响。该器件对 H ₂ O 蒸汽比 O ₂更敏感，尽管两者都会导致 TFT 不稳定。为了提高环境稳定性，比较了含氟聚合物 CYTOP 和 UV 固化粘合剂的喷墨印刷钝化。发现CYTOP钝化与有机通道相容，而UV固化粘合剂对H ₂ O蒸汽和O₂ . 然后引入CYTOP/UV粘合剂双层钝化结合两种材料的优点，实现OTFT的稳定运行，可抵抗饱和H ₂ O蒸汽和O ₂ 25天。