Relation of Structure and Charge Transport in 'Single-Stack' Organic Nanowires

Frauenrath, Holger

Title:

Relation of Structure and Charge Transport in 'Single-Stack' Organic Nanowires

dc.contributor.author	Frauenrath, Holger	en_US
dc.contributor.corporatename	École polytechnique fédérale de Lausanne	en_US
dc.date.accessioned	2013-09-06T18:54:42Z
dc.date.available	2013-09-06T18:54:42Z
dc.date.issued	2013-08-28
dc.description	Holger Frauenrath studied chemistry at RWTH Aachen, Germany from 1992 to 1997, with a focus on synthetic organic chemistry. He performed his PhD thesis from 1998 to 2001 in the research group of Prof Hartwig Höcker at RWTH Aachen, working on a project related to the stereospecific polymerization of methacrylates as well as their copolymerization with olefins using zirconocene catalysts. Afterwards, he joined the group of Prof. Sam Stupp at Northwestern University, Evanston, IL, USA, as a postdoctoral fellow supported by a Feodor Lynen fellowship of the Alexander von Humboldt Foundation. His postdoctoral research projects were centered around the supramolecular self-assembly of rod-coil molecules. After his return to Germany in 2003, he started to build his own research group at FU Berlin, funded with an Emmy Noether Grant from the German Science Foundation. In 2005, the research group moved to the Department of Materials at ETH Zurich, Switzerland, where Holger Frauenrath obtained his Habilitation in 2009. In the same year, he was appointed as a tenure-track assistant professor at the Institute of Materials (IMX) of the École polytechnique fédérale de Lausanne (EPFL), Switzerland, building the new Laboratory of Macromolecular and Organic Materials (LMOM). Holger Frauenrath has won several awards, including the Raimund Stadler Award of the Germany Chemical Society (GdCh), and a European Research Council (ERC) grant.	en_US
dc.description	Presented on Wednesday August 28, 2013 from 11:00 am - 12:00 pm in the Molecular Science and Engineering Building room 1201A.	en_US
dc.description	Runtime: 60:42 minutes.	en_US
dc.description.abstract	Organic nanowires may provide insights into the fundamental processes of charge generation and transport in organic semiconductors under nanoscopic confinement. Here, we demonstrate how a simple molecular design results in nanowires with defined lateral dimensions that comprised a single stack of tightly π–π stacked chromophores at their core. Moreover, we prepared well-defined microfibers that exhibited hierarchical structure formation with a remarkably high degree of internal order and enabled us to obtain detailed structural information on all length scales with molecular level precision. The nanowires and microfibers nanowires showed light-induced formation of radical cations that behaved like positive polaron charge carriers. The nanofibrils were semiconducting, showed space-charge injection-limited conductivity behavior, and exhibited photo-current generation, relating their macroscopic electric properties to the spectroscopically characterized charge carriers. Our results, thus, provide an example of a universal organic nanowire model system that successfully links molecular design, well-defined supramolecular structure formation, charge carrier generation, and finally macroscopic charge transport.	en_US
dc.format.extent	60:42 minutes
dc.identifier.uri	http://hdl.handle.net/1853/48828
dc.language.iso	en_US	en_US
dc.publisher	Georgia Institute of Technology	en_US
dc.relation.ispartofseries	COPE Seminar Series	en_US
dc.subject	Supramolecular self-assembly	en_US
dc.subject	Organic nanowires	en_US
dc.subject	Polarons	en_US
dc.title	Relation of Structure and Charge Transport in 'Single-Stack' Organic Nanowires	en_US
dc.type	Moving Image
dc.type.genre	Lecture
dspace.entity.type	Publication
local.contributor.corporatename	Center for Organic Photonics and Electronics
local.relation.ispartofseries	COPE Seminar Series
relation.isOrgUnitOfPublication	43f8dc5f-0678-4f07-b44a-edbf587c338f
relation.isSeriesOfPublication	642bd61c-9b87-4309-a7dd-1d073b437365