溶液法制备有机薄膜晶体管的碳纳米管电极

Solution Based Fabrication of Carbon Nantube Electrode for Organic Thin Film Transistor

采用十二烷基磺酸钠(SDS)和聚(3,4-乙撑二氧噻吩)/聚苯乙烯磺酸盐(PEDOT/PSS)做分散剂制备了分散性能良好的多壁碳纳米管溶液,借助聚二甲基硅氧烷(PDMS)在硅片表面形成亲水疏水区域,采用溶液法制备了图案化的碳纳米管薄膜电极。应用图案化碳纳米管电极制作聚(3-己基噻吩)有机薄膜晶体管,以SDS和PEDOT/PSS为分散剂获得的器件迁移率分别为0.01 cm2.V-1.s-1和0.007 5 cm2.V-1.s-1,开关电流比均为3×103。

Multi-walled carbon nanotube solution was prepared by using sodium dodecyl suifonate （SDS） and poly （ 3,4-ethylenedioxythiophene ） polymerized with poly （ styrenesulfonate ） （ PEDOT/ PSS） as dispersers. Polydimethylsiloxane （PDMS） was used to make the silicon wafer hydrophilic or hydrophobic. Carbon nanotube thin film electrode can be made using drop-casting method on the patterned silicon wafer. The patterned electrode was used in the organic thin film transistors. The filed-effect mobility of the devices using SDS and PEDOT/PSS as dispersers are 0.01 cm2 · V-· s -1 and 0. 007 5 cm2 · V - 1 · s - 1 , respectively, both the Ion：/off ratio are 3 x 103.