Universität zu Köln

Kahle, Frank-Julian, Saller, Christina, Olthof, Selina ORCID: 0000-0002-8871-1549, Li, Cheng ORCID: 0000-0003-0282-7899, Lebert, Jenny, Weiss, Sebastian, Herzig, Eva M. ORCID: 0000-0002-0151-5562, Huettner, Sven, Meerholz, Klaus, Strohriegl, Peter and Koehler, Anna (2018). Does Electron Delocalization Influence Charge Separation at Donor-Acceptor Interfaces in Organic Photovoltaic Cells? J. Phys. Chem. C, 122 (38). S. 21792 - 21803. WASHINGTON: AMER CHEMICAL SOC. ISSN 1932-7447

Full text not available from this repository.

Abstract

We use bilayer devices with a series of three fullerene acceptors differing in order and intermolecular coupling to systematically explore the influence of electron delocalization in the acceptor phase on the dissociation efficiency of charge transfer states. Structural information from GIWAXS measurements is combined with the results of optical and electrical characterization as well as theoretical modeling. Our results indicate that an increase in CT-dissociation efficiency is directly coupled to an enhancement in electron delocalization that is particularly prominent for C-60 which forms crystalline domains. Therefore, our results substantiate the concept of delocalization of electrons taking a positive role in the charge separation process, and of acceptor crystallinity being crucial in this respect.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kahle, Frank-Julian UNSPECIFIED UNSPECIFIED UNSPECIFIED Saller, Christina UNSPECIFIED UNSPECIFIED UNSPECIFIED Olthof, Selina UNSPECIFIED orcid.org/0000-0002-8871-1549 UNSPECIFIED Li, Cheng UNSPECIFIED orcid.org/0000-0003-0282-7899 UNSPECIFIED Lebert, Jenny UNSPECIFIED UNSPECIFIED UNSPECIFIED Weiss, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED Herzig, Eva M. UNSPECIFIED orcid.org/0000-0002-0151-5562 UNSPECIFIED Huettner, Sven UNSPECIFIED UNSPECIFIED UNSPECIFIED Meerholz, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Strohriegl, Peter UNSPECIFIED UNSPECIFIED UNSPECIFIED Koehler, Anna UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-172413
DOI:	10.1021/acs.jpcc.8b06429
Journal or Publication Title:	J. Phys. Chem. C
Volume:	122
Number:	38
Page Range:	S. 21792 - 21803
Date:	2018
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1932-7447
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 HETEROJUNCTION SOLAR-CELLS; TRANSFER STATES; SPECTROSCOPIC ELLIPSOMETRY; CARRIER MOBILITY; FIELD-DEPENDENCE; BLEND FILMS; THIN-FILMS; ESTER PCBM; FULLERENE; POLYMER Multiple languages Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17241