Photoelectron spectroscopy to probe the mechanism of electron transfer through oligo(phenylene vinylene) bridges

Journal of Physical Chemistry B

Volumn 107, Issue 5, 2003, Pages 1170-1173

  Sikes, Hadley D ^a   Sun, Yun ^a,b   Dudek, Stephen P ^a   Chidsey, Christopher E D ^a   Pianetta, Piero ^b  

^a STANFORD UNIVERSITY   (United States)

^b SLAC NATIONAL ACCELERATOR LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CHARGE TRANSFER; CONDENSATION REACTIONS; FERMI LEVEL; GOLD; INTERFACES (MATERIALS); MONOLAYERS; PHOTOELECTRON SPECTROSCOPY; PHOTOEMISSION; SYNCHROTRON RADIATION;

ELECTRON TRANSFER; FERROCENE; HIGHEST OCCUPIED MOLECULAR ORBITAL; HOLE INJECTION BARRIER; OLIGOHENYLENE VINYLENE;

ORGANIC COMPOUNDS;

EID: 0037421864     PISSN: 10895647     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp026734a     Document Type: Article

References (20)

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19. Gold substrates were not prepared in situ; they were evaporated elsewhere as described in refs 3 and 15 and cleaned with a piranha etch prior to being loaded into the vacuum chamber and analyzed by UPS. As a result, they are not expected to be rigorously clean. Because they are used later in wet chemical soaks during self-assembled monolayer formation, depositing gold films in situ did not make sense. The gold films are sufficiently clean that the Fermi edge is visible.
20. It is reasonable to assume that the dipole layer at the interface between gold and Fc-OPV3-methyl thiol is of essentially the same magnitude and direction as the dipole layer at the interface between gold and pyridine-OPV3-methyl thiol because the molecular structures are the same except for the terminal groups situated about 2 nm from the metal-organic interface. As a result, it is possible to compare energies in the two monolayers without explicitly finding a vacuum level shift that originates from interfacial dipole layers as described by Ishii et al. in ref 11.