Show simple item record

dc.contributor.authorLiu, Lixia
dc.contributor.authorXie, Hong
dc.contributor.authorBostic, Heidi E.
dc.contributor.authorJin, Limei
dc.contributor.authorBest, Michael D.
dc.contributor.authorZhang, X. Peter
dc.contributor.authorZhan, Wei
dc.date.accessioned2016-02-25T13:12:19Z
dc.date.available2016-02-25T13:12:19Z
dc.date.issued2013-06-21
dc.identifier.citationLiu L, Xie H, Bostic HE, Jin L, Best MD, et al. (2013) Effects of Oriented Surface Dipole on Photoconversion Efficiency in an Alkane/Lipid-Hybrid-Bilayer-Based Photovoltaic Model System. ChemPhysChem 14: 2777–2785. Available: http://dx.doi.org/10.1002/cphc.201300293.
dc.identifier.issn1439-4235
dc.identifier.pmid23794419
dc.identifier.doi10.1002/cphc.201300293
dc.identifier.urihttp://hdl.handle.net/10754/598082
dc.description.abstractWhen a phospholipid monolayer containing a zinc-coordinated porphyrin species formed atop a self-assembled monolayer of heptadecafluoro-1-decanethiol (CF3(CF2)7(CH2)2SH) is subjected to photoelectrochemical current generation, a significant modulation effect is observed. Compared with devices that contain similar photoactive lipid monolayers but formed on 1-dodecanethiol SAMs, these fluorinated hybrid bilayers produce a >60 % increase in cathodic currents and a similar decrease in anodic currents. Photovoltages recorded from these hybrid bilayers are found to vary in the same fashion. The modulation of photovoltaic responses in these hybrid-bilayer-based devices is explained by the opposite surface dipoles associated with the thiols employed in this study, which in one case (fluorothiol) increase and in another (alkanethiol) decrease the work function of the underlying gold substrates. A similar trend of photovoltage/photocurrent modulation is also observed if fullerene is used as the photoagent in these devices. Our results reveal the intricacy of orientated surface dipole in influencing the photovoltaic processes, and its subtle interplay with other factors related to the photoagents, such as their location and orientation within the organic matrix. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
dc.description.sponsorshipThis work is supported by the National Science Foundation (award No.: CHE-0951743 to W.Z., CHE-0954297 to M. D. B., and CHE-1152767 to X.P.Z.). X.P.Z. also acknowledges support from the King Abdullah University of Science and Technology (KAUST) (Award FIC/2010/06). Computation in this work was carried out using facilities at the Alabama Supercomputer Center. W.Z. thanks Dr. O. Acevedo (AU) for providing software for calculation.
dc.publisherWiley
dc.subjectcharge-carrier injection
dc.subjectelectrochemistry
dc.subjectlipids
dc.subjectmagnetic properties
dc.subjectself-assembly
dc.titleEffects of Oriented Surface Dipole on Photoconversion Efficiency in an Alkane/Lipid-Hybrid-Bilayer-Based Photovoltaic Model System
dc.typeArticle
dc.identifier.journalChemPhysChem
dc.contributor.institutionAuburn University, Auburn, United States
dc.contributor.institutionUniversity of Tennessee, Knoxville, Knoxville, United States
dc.contributor.institutionUniversity of South Florida Tampa, Tampa, United States
kaust.grant.numberFIC/2010/06
dc.date.published-online2013-06-21
dc.date.published-print2013-08-26


This item appears in the following Collection(s)

Show simple item record