Studies On The Synthesis And Characterization Of Tetracene Derivatives

Field-effect transistors (FETs) play a fundamental role in the modern information scienceand technology. As the component of the large scale integrated circuit (LSI), it makes greatcontribution to the development of human society in the past few decades. Due to defects ofinorganic materials and the law of quantum, it’s difficult to effects further development of LSIAt this time, organic field-effect transistor (OFET) get people’s attention. It provids a newdirection to the development of modern information material. The major difference of OFET andtraditional field-effect transistor is that the semiconductor layers consistent of organicsemiconductors. OFET is technologically interesting since it can decrease the fabrication costand work as flexible electronic circuits. Major possible applications are radio frequencyidentification tags and flexible displays. These products’ prototypes have been recognized andare now approaching to being brought to the market. But organic field-effect material also hassome disadvantages. For example, the carrier mobility is relatively low，the stability is poorand ratio of on/off is not very high. In order to obtain high mobility, high stability (especially airstable) and fabricate device by solution method easily, the discovery of suitable materials forOFETs device is opportunities and challenges for material researchers especially researchers ofOFET materialsWe compose tetracene derivatives A-1, B-1and C-1by Sonogashira coupling and Bergmancyclization reaction. Because of introduction of alkyl chains，their solubility have been improved.Introducing atoms that contain empty d orbital(sulfur e.g) enhances the interaction betweenmolecules by van der Waals forces, π orbit interaction and sulfur-sulfur weak interaction andmake molecular arrangement more closely at solid state to obtain high carrier mobility of OFET.The HOMO level of compound A-1, B-1and C-1is-5.297eV,-5.697eV and-5.547eVrespectively, indicating they have good air stability. By researching on thermal stability ofcompounds A-1, B-1and C their decomposition temperature is343.8oC,372oC and361oCrespectively, which means that they have good thermal stability and potential of large-scaleindustrialization.