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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Crystal Structure of Fiber Structured Pentacene Thin Films - A Crystal Truncation Rod Study Using Synchrotron X-Rays

Crystal Structure of Fiber Structured Pentacene Thin Films - A Crystal Truncation Rod Study Using Synchrotron X-Rays

Schiefer, Stefan

Paperback

Physics

ISBN10: 3836493632
ISBN13: 9783836493635
Publisher: Vdm Verlag
Published: Apr 23 2008
Pages: 164
Weight: 0.50
Height: 0.35 Width: 6.00 Depth: 9.00
Language: English
It is widely recognized that the intrinsic charge transport properties in organic thin-film transistors (OTFTs) depend strongly on the crystal structure of the organic semiconductor layer. Pentacene, showing one of the highest charge carrier mobilities among organic semi-conductors, is known to crystallize in at least four polymorphs, which can be distinguished by their layer periodicity d(001). Only two polymorphs grow as single crystals, and their detailed crystal structure has been solved. The substrate-induced 15.4 Å polymorph is the most relevant for OTFT applications; however, its crystal structure has remained incomplete as it only grows as a fiber structured thin film. In this work, the crystal truncation rod X-ray scattering technique is extended to fiber structured thin films. Through this novel technique, the complete crystal structure of this polymorph grown on technologically relevant substrates could be solved. It was also discovered, that the molecular arrangement within the unit cell is substrate dependent, which may lead to a controlled fine-tuning of intrinsic charge transport properties.

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