Effects of Self-Assembled Monolayers on Solid-State CdS Quantum Dot Sensitized Solar Cells
Brennan, Thomas P.
Bakke, Jonathan R.
McGehee, Michael D.
Bent, Stacey F.
MetadataShow full item record
AbstractQuantum dot sensitized solar cells (QDSSCs) are of interest for solar energy conversion because of their tunable band gap and promise of stable, low-cost performance. We have investigated the effects of self-assembled monolayers (SAMs) with phosphonic acid headgroups on the bonding and performance of cadmium sulfide (CdS) solid-state QDSSCs. CdS quantum dots ∼2 to ∼6 nm in diameter were grown on SAM-passivated planar or nanostructured TiO 2 surfaces by successive ionic layer adsorption and reaction (SILAR), and photovoltaic devices were fabricated with spiro-OMeTAD as the solid-state hole conductor. X-ray photoelectron spectroscopy, Auger electron spectroscopy, ultraviolet-visible spectroscopy, scanning electron microscopy, transmission electron microscopy, water contact angle measurements, ellipsometry, and electrical measurements were employed to characterize the materials and the resulting device performance. The data indicate that the nature of the SAM tailgroup does not significantly affect the uptake of CdS quantum dots on TiO2 nor their optical properties, but the presence of the SAM does have a significant effect on the photovoltaic device performance. Interestingly, we observe up to ∼3 times higher power conversion efficiencies in devices with a SAM compared to those without the SAM. © 2011 American Chemical Society.
CitationArdalan P, Brennan TP, Lee H-B-R, Bakke JR, Ding I-K, et al. (2011) Effects of Self-Assembled Monolayers on Solid-State CdS Quantum Dot Sensitized Solar Cells. ACS Nano 5: 1495–1504. Available: http://dx.doi.org/10.1021/nn103371v.
SponsorsWe would like to thank the Stanford Nanocharacterization Laboratory (SNL) staff and the staff of the Center for Polymer Interfaces and Macromolecular Assemblies (CPIMA) for their support. This publication was based on work supported by the Center for Advanced Molecular Photovoltaics (Award No. KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST).
PublisherAmerican Chemical Society (ACS)
CollectionsPublications Acknowledging KAUST Support
- Efficient CdSe quantum dot-sensitized solar cells prepared by an improved successive ionic layer adsorption and reaction process.
- Authors: Lee H, Wang M, Chen P, Gamelin DR, Zakeeruddin SM, Grätzel M, Nazeeruddin MK
- Issue date: 2009 Dec
- Photovoltaic and Impedance Spectroscopy Study of Screen-Printed TiO₂ Based CdS Quantum Dot Sensitized Solar Cells.
- Authors: Atif M, Farooq WA, Fatehmulla A, Aslam M, Ali SM
- Issue date: 2015 Jan 19
- CdS-sensitized TiO2 nanocorals: hydrothermal synthesis, characterization, application.
- Authors: Mali SS, Desai SK, Dalavi DS, Betty CA, Bhosale PN, Patil PS
- Issue date: 2011 Oct
- Surface photovoltage characterization of a ZnO nanowire array/CdS quantum dot heterogeneous film and its application for photovoltaic devices.
- Authors: Zhang Y, Xie T, Jiang T, Wei X, Pang S, Wang X, Wang D
- Issue date: 2009 Apr 15
- Zn-doped nanocrystalline TiO2 films for CdS quantum dot sensitized solar cells.
- Authors: Zhu G, Cheng Z, Lv T, Pan L, Zhao Q, Sun Z
- Issue date: 2010 Jul