Efficient interface engineering for high-performance fully inkjetprinted organic thin-film devices via functionalized polystyrene interlayers

摘要

We report efficient interface engineering to realize high-performance fully inkjet-printed organic thin-film transistor(OTFTs) and their applications. By depositing an organo-compatible end-functionalized polystyrene (PS) layer betweenorganic semiconducting layers and inkjet-printed metallic or conductive polymer contacts, simultaneously, well-orderedcrystals of organic semiconductors and reduced contact resistance were delivered, resulting in much improved carriertransport and carrier injection abilities. These results may be attributed to the introduction of organo-compatible surfaceproperties that requires less activation energy for carrier transport and carrier injection. This methodology is compatibleto high-speed and low-temperature printing technologies, therefore it can pave a promising route for realizing highperformanceprinted thin-film devices including TFTs, sensors, and light-emitting device applications.