Crystal Structure of Fiber StructuredPentacene Thin Films: A Crystal Truncation Rod Study Using Synchrotron X-Rays - Couverture souple

Schiefer, Stefan

 
9783836493635: Crystal Structure of Fiber StructuredPentacene Thin Films: A Crystal Truncation Rod Study Using Synchrotron X-Rays
Couverture souple
ISBN 10 : 3836493632 ISBN 13 : 9783836493635
Editeur : VDM Verlag Dr. Müller, 2008

Synopsis

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 semiconductors, 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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Présentation de l'éditeur

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 semiconductors, 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.

Biographie de l'auteur

Dr. Stefan Schiefer: Study of physics and chemical engineering at Technische Universität München and Stanford University. This work was developed at the Center for NanoScience (CeNS) at Ludwig-Maximilians-Universität München and was awarded with the CeNS publication award 2007. Dr. Schiefer now works for the Boston Consulting Group as a consultant.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
VDM Verlag Dr. Müller
Date d'édition
2008
Langue
anglais
ISBN 10 
3836493632
ISBN 13 
9783836493635
Reliure
Broché
Nombre de pages
164
Coordonnées du fabricant
non disponible
Personne responsable
non disponible