title: Electronic structure and interface properties of a model molecule for organic solar cells.
abstract: We study the electronic structure of 4,7-bis(5-methylthiophen-2-yl)benzo[c][1,2,5]thiadiazole (MTBT) and its interface properties with gold using X-ray photoemission spectroscopy (XPS), valence-band ultraviolet photoemission spectroscopy (UPS), X-ray absorption spectroscopy (XAS), as well as resonant photoemission (ResPES). MTBT can be regarded as a model molecule for PCPDTBT, a promising candidate for efficient bulk heterojunction solar cells. Almost no contribution of sulfur and only a weak contribution of nitrogen to the HOMO level is found. At the interface with gold, a strong chemical interaction between the sulfur of the benzothiadiazole and gold occurs, which may have consequences for interface properties in devices.
authors: Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany.
authors: Holger
authors: H
authors: Hintz
authors: Heiko
authors: H
authors: Peisert
authors: Umut
authors: U
authors: Aygül
authors: Florian
authors: F
authors: Latteyer
authors: Indro
authors: I
authors: Biswas
authors: Peter
authors: P
authors: Nagel
authors: Michael
authors: M
authors: Merz
authors: Stefan
authors: S
authors: Schuppler
authors: Dietrich
authors: D
authors: Breusov
authors: Sybille
authors: S
authors: Allard
authors: Ullrich
authors: U
authors: Scherf
authors: Thomas
authors: T
authors: Chassé