Effects of Oriented Surface Dipole on Photoconversion Efficiency in an Alkane/Lipid-Hybrid-Bilayer-Based Photovoltaic Model System
KAUST Grant NumberFIC/2010/06
Permanent link to this recordhttp://hdl.handle.net/10754/598082
MetadataShow full item record
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.
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.
SponsorsThis 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.
CollectionsPublications Acknowledging KAUST Support
- A modular molecular photovoltaic system based on phospholipid/alkanethiol hybrid bilayers: photocurrent generation and modulation.
- Authors: Xie H, Jiang K, Zhan W
- Issue date: 2011 Oct 21
- Photocurrent generation from Ru(bpy)3(2+) immobilized on phospholipid/alkanethiol hybrid bilayers.
- Authors: Jiang K, Xie H, Zhan W
- Issue date: 2009 Sep 15
- Molecular photovoltaic system based on fullerenes and carotenoids co-assembled in lipid/alkanethiol hybrid bilayers.
- Authors: Liu L, Zhan W
- Issue date: 2012 Mar 13
- The role of surface free energy on the formation of hybrid bilayer membranes.
- Authors: Silin VI, Wieder H, Woodward JT, Valincius G, Offenhausser A, Plant AL
- Issue date: 2002 Dec 11
- Mimicking Photosynthesis with Electrode-Supported Lipid Nanoassemblies.
- Authors: Wang M, Zhan W
- Issue date: 2016 Nov 15