Modification of Charge Transfer and Energy Level Alignment at Organic/TiO2 Interfaces
(2009) In Journal of Physical Chemistry C 113(31). p.13765-13771- Abstract
- Adsorption of titanyl phthalocyanine (TiOPc) on rutile TiO2(110) modified by a set of pyridine derivatives (2,2'-bipyridine, 4,4'-bipyridine, and 4-tert-butyl pyridine) has been investigated using synchrotron radiation based X-ray photoelectron spectroscopy (XPS). For the unmodified TiOPc/TiO2 system, a strong charge transfer is observed from the first layer TiOPc into the substrate, which leads to a molecular layer at the interface with a depleted highest occupied molecular orbital (HOMO). However, precovering the TiO2 surface with a saturated pyridine monolayer effectively reduce this process and leave the TiOPc in a less perturbed molecular state. Furthermore, the TiOPc HOMO and core levels are observed at different binding energies... (More)
- Adsorption of titanyl phthalocyanine (TiOPc) on rutile TiO2(110) modified by a set of pyridine derivatives (2,2'-bipyridine, 4,4'-bipyridine, and 4-tert-butyl pyridine) has been investigated using synchrotron radiation based X-ray photoelectron spectroscopy (XPS). For the unmodified TiOPc/TiO2 system, a strong charge transfer is observed from the first layer TiOPc into the substrate, which leads to a molecular layer at the interface with a depleted highest occupied molecular orbital (HOMO). However, precovering the TiO2 surface with a saturated pyridine monolayer effectively reduce this process and leave the TiOPc in a less perturbed molecular state. Furthermore, the TiOPc HOMO and core levels are observed at different binding energies ranging by 0.3 eV on the three pyridine monolayers, which is ascribed to differences in surface potentials set up by the different pyridine/TiO2 systems. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1459947
- author
- Yu, Shun ; Ahmadi, Sarch ; Palmgren, Pål LU ; Hennies, Franz LU ; Zuleta, Marcelo and Gothelid, Mats
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physical Chemistry C
- volume
- 113
- issue
- 31
- pages
- 13765 - 13771
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000268478700047
- scopus:68749107094
- ISSN
- 1932-7447
- DOI
- 10.1021/jp902814d
- language
- English
- LU publication?
- yes
- id
- 514f4986-f60c-495c-8d7b-4b62c3a84e9b (old id 1459947)
- date added to LUP
- 2016-04-01 12:05:28
- date last changed
- 2022-01-26 22:40:46
@article{514f4986-f60c-495c-8d7b-4b62c3a84e9b,
abstract = {{Adsorption of titanyl phthalocyanine (TiOPc) on rutile TiO2(110) modified by a set of pyridine derivatives (2,2'-bipyridine, 4,4'-bipyridine, and 4-tert-butyl pyridine) has been investigated using synchrotron radiation based X-ray photoelectron spectroscopy (XPS). For the unmodified TiOPc/TiO2 system, a strong charge transfer is observed from the first layer TiOPc into the substrate, which leads to a molecular layer at the interface with a depleted highest occupied molecular orbital (HOMO). However, precovering the TiO2 surface with a saturated pyridine monolayer effectively reduce this process and leave the TiOPc in a less perturbed molecular state. Furthermore, the TiOPc HOMO and core levels are observed at different binding energies ranging by 0.3 eV on the three pyridine monolayers, which is ascribed to differences in surface potentials set up by the different pyridine/TiO2 systems.}},
author = {{Yu, Shun and Ahmadi, Sarch and Palmgren, Pål and Hennies, Franz and Zuleta, Marcelo and Gothelid, Mats}},
issn = {{1932-7447}},
language = {{eng}},
number = {{31}},
pages = {{13765--13771}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Journal of Physical Chemistry C}},
title = {{Modification of Charge Transfer and Energy Level Alignment at Organic/TiO2 Interfaces}},
url = {{http://dx.doi.org/10.1021/jp902814d}},
doi = {{10.1021/jp902814d}},
volume = {{113}},
year = {{2009}},
}