Electronic structure and interface properties of a model molecule for organic solar cells

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
Holger HintzThomas Chassé

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.

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Citations

Aug 9, 2013·Physical Chemistry Chemical Physics : PCCP·João PinaUllrich Scherf
Jul 10, 2014·Physical Chemistry Chemical Physics : PCCP·Rebecka LindbladHåkan Rensmo
Jul 1, 2011·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Umut AygülThomas Chassé
Nov 12, 2014·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Umut AygülThomas Chassé
Nov 6, 2018·Journal of the American Chemical Society·Ane SarasolaLucia Vitali

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