PEDOT∶PSS掺杂丝素蛋白复合薄膜的半导体性能

Semiconducting Properties of PEDOT∶PSS Doped Silk Fibroin Composite Film

为了揭示丝素蛋白与有机半导体聚合物聚3,4-乙撑二氧噻吩:聚苯乙烯磺酸(PEDOT∶PSS)复合薄膜作为有源层的场效应,采用旋涂制膜法在重掺杂氧化硅片上制备了厚度均一、表面平整度较好的场效应晶体管,并探索了这种生物相容性可降解材料作为半导体的潜质。通过XRD、紫外-可见光分光光度计、FTIR和拉曼光谱等表征手段研究了丝素蛋白与PEDOT∶PSS复合薄膜的构象变化。复合薄膜晶体管的输出和转移特性曲线表明,器件的开关电流比为3、阈值电压为20 V、场效应迁移率为7.9 cm^2/(V·s)。实验结果表明,通过在丝素蛋白中添加PEDOT∶PSS制备复合材料依然能够有效保留有机半导体的优良电学性质,证明了通过对生物材料进行掺杂是一种制备功能化生物复合材料的有效手段。

In order to reveal the field effect of silk fibroin and organic semiconductor polymer(PEDOT∶PSS)composite film asan active layer,the thin film with uniform thickness and good surface smoothness based transistor was fabricated onto heavily doped silicon dioxide by spin-coating method.The potential in semiconductor application of this biocompatible degradable material was investigated.The conformational evolution of silk fibroin and PEDOT∶PSS composite film was analyzed by XRD,UV-Vis spectrophotometer,FTIR and Raman spectroscopy.The output and transfer characteristic curves of the device were analyzed and studied.The ratio of the switching current is about 3,the threshold voltage is 20 V,and the field-effect mobility is about 7.9 cm 2/(V·s).The experimental results show that the composite material prepared by an appropriate process by mixing PEDOT∶PSS to silk fibroin can still retain the excellent electronic properties of organic semiconductors.It is proved that doping in biological materials is an effective method to prepare functionalized biocomposites for broadening its applications.