Clarifying the adsorption of triphenylamine on Au(111): Filling the HOMO-LUMO gap

0564856 - FZÚ 2023 RIV US eng J - Journal Article
Zhang, T. - Svensson, P.H.W. - Brumboiu, I.E. - Lanzilotto, V. - Grazioli, C. - Guarnaccio, A. - Johansson, F.O.L. - Beranová, Klára - Coreno, M. - De Simone, M. - Floreano, L. - Cossaro, A. - Brena, B. - Puglia, C.
Clarifying the adsorption of triphenylamine on Au(111): Filling the HOMO-LUMO gap.
Journal of Physical Chemistry C. Roč. 126, č. 3 (2022), s. 1635-1643. ISSN 1932-7447. E-ISSN 1932-7455
Institutional support: RVO:68378271
Keywords : TPA * Au(111) * NEXAFS * unoccupied electronic states * HOMO-LUMO gap
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.7, year: 2022
Method of publishing: Open access

In this article, we analyze the electronic structure modifications of triphenylamine (TPA), a well-known electron donor molecule widely used in photovoltaics and optoelectronics, upon deposition on Au(111) at a monolayer coverage. A detailed study was carried out by synchrotron radiation-based photoelectron spectroscopy, near-edge X-ray absorption fine structure (NEXAFS) spectroscopy, scanning tunneling microscopy (STM), and ab initio calculations. We detect a new feature in the pre-edge energy region of the N K-edge NEXAFS spectrum that extends over 3 eV, which we assign to transitions involving new electronic states.
Permanent Link: https://hdl.handle.net/11104/0336429