Novel Perylene Derivative having an Ether Group in the Side Chains for Solution-Processible n-Channel Transistors with Very High Electron Mobility

The authors report a novel perylene derivative [N,N '-bis(3-dodecyloxy-propyl)-perylene tetracarboxylic diimide, PTCDI-C3OC12] as a soluble high-performance n-type organic semiconductor. The solubility of the PTCDI derivative was increased sufficiently to be handled using wet processes by inserting ether groups in side alkyl chains of the PTCDI derivative. The highest electron mobility obtained for a spin-coated PTCDI-C3OC12 film was 0.52 cm2/(Vs) with a very low threshold voltage of ca. 2 V. This high performance of PTCDI-C3OC12 is explained by the large grain size with an appropriate molecular packing pattern and tight intergrain connections.