Organic semiconductors ambipolar

Due to the great potential applications and the widespread interests of OFETs, several review articles with emphasis on different aspects of OFETs have been published [8-13], However, despite the extensive studies and increasing research interests in phthalocyanine as well as porphyrin semiconductors, there is still no review article that systematically generalizes the research achievements in the field of tetrapyrrole organic semiconductors for OFETs. Thus, the present contribution should interest scientists in both industrial and theoretical fields. The main contents of this chapter is as follows Firstly, some basic introduction of the structure and characteristics of OFET is provided then theoretical factors that influence the performance of OFET devices is discussed finally, the progress in phthalocyanine-based OFETs in the order of p-type, n-type, and ambipolar semiconductors is summarized. 

Ambipolar Charge Carrier Transport in Organic Semiconductor Blends... 

Contemporary OFETs are based on undoped organic semiconductors, and mobile charges in these devices must be injected from the metallic contacts. These devices can potentially operate in the electron- and the ftote-accumulation modes, depending on the polarity of the gate voltage (the so-called ambipolar operation). Often, however, the injection barrier at the contact or the held-effect threshold for either n- or... 

Ambipolar organic semiconductors are materials that are able to transport both holes and electrons. Despite the fact that ambipolarity was long predicted to be a generic property of organic conjugated materials (i.e., small-molecules and polymers) the first ambipolar polymer transistors have... 

R. P. Ortiz, J. Casado, V. Hernandez, J. T. Lopez Navarrete, E. Ortf, P. M. Viruela, B. Mihw, S. Hotta, G. Zotti, S. Zecchin and B. VerceUi, Magnetic properties of quinoidal oligothiophenes more than good candidates for ambipolar organic semiconductors , Adv. Funct. Mater., 16, 531-536 (2006). 

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