The starburst p-conjugated molecule based on triphenylamine (TPA) building blocks, 4,4?,4?-tris(N-3-ethylphenyl-N-phenylamino)triphenylamine (C57H48N4, m-MTDATA), is widely used in optoelectronic devices due to its electron-donating properties. The electronic structure of m-MTDATA adsorbed on an Au(111) surface was investigated by means of photoelectron spectroscopy (PES) and near edge X-ray absorption fine structure (NEXAFS) spectroscopy. The results were further compared to gas-phase measurements and DFT calculations. Our results clearly indicate a significant molecule-substrate interaction that induces considerable modifications on the electronic structure of the adsorbate compared to the isolated molecule. The energy level alignment analysis shows that the HOMO-LUMO gap is filled by new interface states.
M-MTDATA on Au(111): Spectroscopic Evidence of Molecule-Substrate Interactions
Grazioli C;Guarnaccio A;Coreno M;De Simone M;
2022
Abstract
The starburst p-conjugated molecule based on triphenylamine (TPA) building blocks, 4,4?,4?-tris(N-3-ethylphenyl-N-phenylamino)triphenylamine (C57H48N4, m-MTDATA), is widely used in optoelectronic devices due to its electron-donating properties. The electronic structure of m-MTDATA adsorbed on an Au(111) surface was investigated by means of photoelectron spectroscopy (PES) and near edge X-ray absorption fine structure (NEXAFS) spectroscopy. The results were further compared to gas-phase measurements and DFT calculations. Our results clearly indicate a significant molecule-substrate interaction that induces considerable modifications on the electronic structure of the adsorbate compared to the isolated molecule. The energy level alignment analysis shows that the HOMO-LUMO gap is filled by new interface states.| File | Dimensione | Formato | |
|---|---|---|---|
|
Zhang_JPhysChemC_2022_accepted.pdf
Open Access dal 09/02/2023
Tipologia:
Documento in Post-print
Licenza:
Creative commons
Dimensione
442.42 kB
Formato
Adobe PDF
|
442.42 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
