Abstract
In the last decade, investigations into the physical properties of organic semiconductors have shown that these materials have several interesting features as regards applications in electrical and optical devices. The semiconducting and metallic properties of π-electron-rich systems, both small molecules and polymers, have shown exciting properties compared with conventional systems [1–3]. This is mainly due to the presence of delocalized π-electrons, which play a crucial role in the electrical and optical properties of conjugated systems. A wide range of materials, from simple donor-acceptor molecules, oligomers, and complex supramolecular assemblies to large size macromolecules, are available as organic semiconductors. Moreover, the physical and chemical properties of these materials can be tailored by molecular level engineering. Since organic semiconductors have a wide range of chemical structures (size, shape, etc.), functionality, crystallinity, morphology, disorder, impurities, etc., the physical properties show a wide variety of behavior, and often not as simple as in the case of inorganic semiconductors. Hence, in terms of both materials and physical properties, these systems are quite complex and several parameters govern physical phenomena and device performances.
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Menon, R. (2003). Transport Properties of Conjugated Polymers. In: Brabec, C.J., Dyakonov, V., Parisi, J., Sariciftci, N.S. (eds) Organic Photovoltaics. Springer Series in Materials Science, vol 60. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-05187-0_3
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