Tuning Crystal Ordering, Electronic Structure, and Morphology in Organic Semiconductors: Tetrathiafulvalenes as a Model Case

Tetrathiafulvalenes (TTFs) are an appealing class of organic small molecules giving rise to some of the highest performing active materials reported for organic field effect transistors (OFETs). Because they can be easily chemically modified, TTF‐derivatives are ideal candidates to perform molecule–...

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Veröffentlicht in:Advanced functional materials Jg. 26; H. 14; S. 2256 - 2275
Hauptverfasser: Pfattner, Raphael, Bromley, Stefan T., Rovira, Concepció, Mas-Torrent, Marta
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Blackwell Publishing Ltd 12.04.2016
Wiley-VCH
Schlagworte:
Compostos orgànics
Devices
Electronic structure
Electronics
Estructura electrònica
Field effect transistors
Order disorder
Organic compounds
organic field-effect transistors
Organic semiconductors
Semiconductor devices
Semiconductors orgànics
small molecules
structure-performance correlation
tetrathiafulvalenes
Transistors
Tuning
ISSN:1616-301X, 1616-3028
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Zusammenfassung:Tetrathiafulvalenes (TTFs) are an appealing class of organic small molecules giving rise to some of the highest performing active materials reported for organic field effect transistors (OFETs). Because they can be easily chemically modified, TTF‐derivatives are ideal candidates to perform molecule–property correlation studies and, especially, to elucidate the impact of molecular and crystal engineering on device performance. A brief introduction into the state‐of‐the‐art of the field‐effect mobility values achieved with TTF derivatives employing different fabrication techniques is provided. Following, structure–performance relationships are discussed, including polymorphism, a phenomenon which is crucial to control for ensuring device reproducibility. It is also shown that chemical modification of TTFs has a strong influence on the electronic structure of these materials, affecting their stability as well as the nature of the generated charge carriers, leading to devices with p‐channel, n‐channel, or even ambipolar behaviour. TTFs have also shown promise in other applications, such as phototransistors, sensors, or as dopants or components of organic metal charge transfer salts used as source–drain contacts. Overall, TTFs are appealing building blocks in organic electronics, not only because they can be tailored to perform fundamental studies, but also because they offer a wide spectrum of potential applications. Tetrathiafulvalenes are promising active materials in organic field‐effect transistors (OFETs), in which they exhibit high performances. An overview is provided of the use of this family of materials as a model building block for OFETs to highlight general concepts of organic semiconductors and their use in devices.
Bibliographie:ArticleID:ADFM201502446
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content type line 23
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201502446