Organic field-effect transistor device

Heeney M, Bailey C, Giles M, Shkunov M, Spanowe D, Tioney S, Zhang W, McCulloch I (2004) Alkylidene fluorene liquid crystalline semiconducting polymta for organic field-effect transistor devices. Macromolecules 37 5250-5256... 

As a class of n-type organic semiconductors, PBI derivatives have received considerable attention for a variety of applications [312, 313], for example, for organic or polymer light-emitting diodes (OLEDs and PLEDs) [314, 315], thin-film organic field-effect transistors (OFETs) [316, 317], solar cells [318, 319], and liquid crystals [320]. They are also interesting candidates for single-molecule device applications, such as sensors [321], molecular wires [322], or transistors [141]. 

Organic field-effect transistors Electroluminescent devices... 

The field known as organic or plastic electronics is centered on field effect transistor (FET)-based circuits mounted on large-area and/or flexible substrates. When the semiconductor is organic, the device is referred to as an organic field-effect transistor (OFET). Work on OFET has been extensively reviewed, most notably and comprehensively in Chemistry of Materials and Journal of Materials Research special issues, to which the one of us has contributed three articles [1-3]. 

Contacts are the elementary building blocks for all electronic devices. These include interfaces between semiconductors of different doping type (homojunc-tions) or of different composition (heterojunctions), and junctions between a metal and a semiconductor, which can be either rectifying (Schottky junction) or ohmic. Because of their primary importance, tire physics of semiconductor jrmc-tions is largely dealt with in numerous textbooks [11, 12]. We shall concentrate here on basic aspects of the metal-semiconductor (MS) and, above all, metal-insulator-semiconductor (MIS) junctions, which are involved in the organic field-effect transistors. 

Organic Field Effect Transistors - Prototype Devices in Organic Electronics... 

This book demonstrates fundamental physical and chemical aspects in organic electronics by mainly concentrating on one fundamental device, the organic field effect transistor. This important device is prototypical for organic elec-... 

To reach this frequency is in no way trivial, and in particular requires a minimum mobility of charge carriers within the organic field effect transistors. This important issue will be discussed below. It has to be noted, however, that in view of the technological applications, a reliable and constant device performance may be even more important than a peak performance of the individual circuits. 

Because of these fundamental difficulties in applying the time-of-flight method for arbitrary molecular materials, today most mobilities known for molecular materials have in fact been extracted from the electrical characteristics of organic field effect transistors. There are several methods to extract the electron and hole mobilities from the electrical device characteristics of an OFET. For a more thorough description of the different procedures, the reader is referred to the paper by Scheinert and Paasch [13]. 

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