In this study, eco-friendly PTCDI-C8–based organic thin film transistors (OTFTs) were fabricated by incorporating polymers from renewable sources as gate dielectrics and substrates. Chitosan, a polysaccharide obtained from the deacetylation of chitin, and natural rubber (NR), extracted from natural rubber tree, have good dielectric properties, biocompatibility, and biodegradability. To examine the practical applicability of these materials, we fabricated OTFTs using bilayer PVPy/NR and chitosan/NR films as gate dielectric materials. NR not only improved the insulation properties of the dielectric film but also acted as a surface modifier. The fabricated OTFT incorporating chitosan/NR dielectric operated under a low driving voltage, with values of μ and V_th of 0.027 cm²V⁻¹s⁻¹ and 0.83 V, respectively. It also displayed an electrical response in the presence of DNA at different concentrations. Because, chitosan possesses high transparency and good mechanical properties, it can be readily cast to form transparent flexible substrates. Accordingly, a flexible disposable OTFT device was fabricated using PVPy/NR as the dielectric material on chitosan as the substrate. The disposable device exhibited a carrier mobility of 0.011 cm²V⁻¹s⁻¹, a value of V_th of 0.83 V, and an on/off ratio of 10³, while being workable over 100 bending cycles.

在这项研究中，通过掺入可再生资源的聚合物作为栅极电介质和衬底，制造了基于PTCDI-C8的环保型有机薄膜晶体管（OTFT）。从几丁质脱乙酰化得到的多糖壳聚糖和从天然橡胶树中提取的天然橡胶（NR）具有良好的介电性能，生物相容性和生物降解性。为了检查这些材料的实际适用性，我们使用双层PVPy / NR和壳聚糖/ NR膜作为栅极电介质材料制造了OTFT。NR不仅改善了介电膜的绝缘性能，而且还充当了表面改性剂。组装的壳聚糖/ NR电介质的OTFT在低驱动电压下运行，μ和V _th值为0.027 cm^分别为2 V ^-1 s ^-1和0.83V。当存在不同浓度的DNA时，它也显示出电响应。因为壳聚糖具有高透明性和良好的机械性能，所以可以容易地浇铸以形成透明的柔性基材。因此，在壳聚糖作为衬底上使用PVPy / NR作为介电材料制造了柔性一次性OTFT器件。一次性装置表现出0.011cm ² V ^-1 s ^-1的载流子迁移率，0.83V的V _th值和10 ³的开/关比，同时可在100个弯曲循环中使用。