| 초록 |
High performance ambipolar OFET and an inverter were fabricated by successive depositions of 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) and copperhexadecafluorophthalocyanine (F16CuPc). Ordered crystalline microwires of TIPS-pentacene were grown using solution processed capillary tube method and F16CuPc layer by using thermal evaporation method. We report a unique device architecture, in which F16CuPc was deposited on and in between the ordered crystalline microwires of TIPS-pentacene results the formation of highly directional alternate direct n and p-channel between source and drain. More than 90% ambipolar characteristics were achieved for the device consisting thick microwires and 140nm F16CuPc as active layer’s materials. The device exhibited ambipolar mobilities with 3.38x10-3 cm2/Vsec for hole and 1.35x10-4 cm2/Vsec for electron, respectively. Further, air stable ambipolar inverters comprising two ambipolar OTFTs with a gain up to 8.0 is also demonstrated. |
