Universität zu Köln

Meyer, Deborah L., Matsidik, Rukiya, Fazzi, Daniele ORCID: 0000-0002-8515-4214, Sommer, Michael and Biskup, Till ORCID: 0000-0003-2913-0004 (2018). Probing Exciton Delocalization in Organic Semiconductors: Insight from Time-Resolved Electron Paramagnetic Resonance and Magnetophotoselection Experiments. J. Phys. Chem. Lett., 9 (24). S. 7026 - 7037. WASHINGTON: AMER CHEMICAL SOC. ISSN 1948-7185

Full text not available from this repository.

Abstract

Delocalization of excited states of organic semiconductors is directly related to their efficiency in devices. Time-resolved electron paramagnetic resonance spectroscopy provides unique capabilities in this respect because of its high spectral resolution and capability to probe the geometry and extent of excitons. Using magnetophotoselection experiments, the mode of exciton delocalization, along the backbone or parallel to the pi-pi stacking direction of the conjugated polymers, can be revealed. We demonstrate the robustness of this approach by applying it to building blocks of a prototypical conjugated polymer showing a symmetry of their excited states being far from ideal for this experiment. This renders magnetophotoselection superior to other approaches because it is applicable to a wealth of other organic semiconductors. The insight gained into exciton delocalization is crucial to the structure-function relationship of organic semiconductors and directly relevant for developing highly efficient materials.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Meyer, Deborah L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Matsidik, Rukiya UNSPECIFIED UNSPECIFIED UNSPECIFIED Fazzi, Daniele UNSPECIFIED orcid.org/0000-0002-8515-4214 UNSPECIFIED Sommer, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Biskup, Till UNSPECIFIED orcid.org/0000-0003-2913-0004 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-161795
DOI:	10.1021/acs.jpclett.8b03196
Journal or Publication Title:	J. Phys. Chem. Lett.
Volume:	9
Number:	24
Page Range:	S. 7026 - 7037
Date:	2018
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1948-7185
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRIPLET-STATE DELOCALIZATION; CHARGE PHOTOGENERATION; SOLAR-CELLS; NAPHTHALENE; POLYMER; EPR; SPECTROSCOPY; ABSORPTION; COPOLYMERS; SEPARATION Multiple languages Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Atomic, Molecular & Chemical Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/16179