Organic field effect transistors solution-processable materials

Presently there exists a strong research interest in the understanding, development, and optimisation of organic field effect transistors (OFETs) [1, 2]. Two classes of semiconducting organic materials are considered, namely molecular materials which are processed into thin films by vacuum sublimation [1, 2], and polymers which are deposited onto substrates in the form of solutions, for instance by spin coating [3]. In this chapter we report on OFETs based on thin polycrystalline films of the molecular material pentacene (Pc) as the semiconducting material. 

Indole-containing materials are used as organic field-effect transistors (OEET) (Scheme 31). Wudl and colleagues synthesized dinaphthocarbazoles (azaheptacenes) 201 and used them in solution-processed OFETs. These azaheptacenes are more robust than the standard... 

Sirringhaus, H., 2005. Device physics of solution-processed organic field-effect transistors. Advanced Materials 17, 2411—2425. 

Identification of solution processable dielectric materials is also crucial to the commercial application of high performance, low cost, organic thin film field effect transistors. The fiiin dielectric films must be pinhole fiee and have a high breakdown voltage and good long-term stability. To permit fire use of plastic substrates in these devices, it is also desirable that the films can be formed at... 

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