Organic thin film transistors (OTFTs) are normally sensitive to ambient conditions and show performance degradation in air. On the contrary, the performance of flexible 2,7-dioctyl[1] benzothieno [3,2-b][1]benzothiophene (C8-BTBT) OTFTs using cross-linked polymer layer, poly(4-vinyl-phenol)-4,4′-(hexafluoroisopropylidene) diphthalic anhydride (PVP-HDA), as the dielectric layer can be improved in air conditions with 40% relative humidity. Under soaking in air with 40% relative humidity, the electrical behavior, surface morphology, and contact angle of the flexible C8-BTBT OTFTs using PVP-HAD as dielectric layer with three different thicknesses were investigated. It is found that, when the devices with 375 nm-thick PVP-HDA films are placed in 40% relative humidity air conditions for 6 h, the corrected average mobility (μ) can increase from 3.2 to 5.1 cm² V⁻¹ s⁻¹. Furthermore, the average threshold voltage (V_th) changes from −12.4 to −9.3 V while keeping a constant ratio of I_on/I_off = 10⁴. These results indicate that the flexible C8-BTBT OTFTs with PVP-HDA dielectric layer exhibit interesting application prospects.

有机薄膜晶体管（OTFT）通常对环境条件敏感，并且在空气中表现出性能下降。相反，柔性2,7-二辛基[1]苯并噻吩并[3,2- b使用交联聚合物层，聚（4-乙烯基苯酚）-4,4'-（六氟异亚丙基）二邻苯二甲酸酐（PVP-HDA）作为介电层的] [1]苯并噻吩（C8-BTBT）OTFT在相对湿度为40％的空气条件下。在相对湿度为40％的空气中浸泡的情况下，研究了使用PVP-HAD作为三种不同厚度的电介质层的柔性C8-BTBT OTFT的电学性能，表面形态和接触角。据发现，当用375纳米厚的PVP-HDA膜中的设备被放置在相对湿度40％空气条件下6小时，经校正的平均迁移率（μ）可从3.2至5.1厘米增加² V ^-1小号^{- 1}。此外，平均阈值电压（V _th）从-12.4变为-9.3 V，同时保持I _on / I _off = 10 ⁴的恒定比率。这些结果表明，具有PVP-HDA介电层的柔性C8-BTBT OTFT表现出有趣的应用前景。