Effects of Self-Assembled Monolayers on Solid-State CdS Quantum Dot Sensitized Solar Cells

Handle URI:
http://hdl.handle.net/10754/598085
Title:
Effects of Self-Assembled Monolayers on Solid-State CdS Quantum Dot Sensitized Solar Cells
Authors:
Ardalan, Pendar; Brennan, Thomas P.; Lee, Han-Bo-Ram; Bakke, Jonathan R.; Ding, I-Kang; McGehee, Michael D.; Bent, Stacey F.
Abstract:
Quantum 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.
Citation:
Ardalan 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.
Publisher:
American Chemical Society (ACS)
Journal:
ACS Nano
Issue Date:
22-Feb-2011
DOI:
10.1021/nn103371v
PubMed ID:
21299223
Type:
Article
ISSN:
1936-0851; 1936-086X
Sponsors:
We 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).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorArdalan, Pendaren
dc.contributor.authorBrennan, Thomas P.en
dc.contributor.authorLee, Han-Bo-Ramen
dc.contributor.authorBakke, Jonathan R.en
dc.contributor.authorDing, I-Kangen
dc.contributor.authorMcGehee, Michael D.en
dc.contributor.authorBent, Stacey F.en
dc.date.accessioned2016-02-25T13:12:23Zen
dc.date.available2016-02-25T13:12:23Zen
dc.date.issued2011-02-22en
dc.identifier.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.en
dc.identifier.issn1936-0851en
dc.identifier.issn1936-086Xen
dc.identifier.pmid21299223en
dc.identifier.doi10.1021/nn103371ven
dc.identifier.urihttp://hdl.handle.net/10754/598085en
dc.description.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.en
dc.description.sponsorshipWe 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).en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectcadmium sulfideen
dc.subjectnanostructureen
dc.subjectquantum dot sensitized solar cellsen
dc.subjectself-assembled monolayersen
dc.subjectsuccessive ionic layer adsorption and reactionen
dc.subjecttitanium dioxideen
dc.titleEffects of Self-Assembled Monolayers on Solid-State CdS Quantum Dot Sensitized Solar Cellsen
dc.typeArticleen
dc.identifier.journalACS Nanoen
dc.contributor.institutionStanford University, Palo Alto, United Statesen
kaust.grant.fundedcenterCenter for Advanced Molecular Photovoltaics (CAMP)en

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