Control of Solid-State Dye-Sensitized Solar Cell Performance by Block-Copolymer-Directed TiO2 Synthesis

Handle URI:
http://hdl.handle.net/10754/597858
Title:
Control of Solid-State Dye-Sensitized Solar Cell Performance by Block-Copolymer-Directed TiO2 Synthesis
Authors:
Docampo, Pablo; Guldin, Stefan; Stefik, Morgan; Tiwana, Priti; Orilall, M. Christopher; Hüttner, Sven; Sai, Hiroaki; Wiesner, Ulrich; Steiner, Ulrich; Snaith, Henry J.
Abstract:
Hybrid dye-sensitized solar cells are typically composed of mesoporous titania (TiO2), light-harvesting dyes, and organic molecular hole-transporters. Correctly matching the electronic properties of the materials is critical to ensure efficient device operation. In this study, TiO 2 is synthesized in a welldefined morphological confinement that arises from the self-assembly of a diblock copolymer - poly(isoprene-b-ethylene oxide) (Pl-b-PEO). The crystallization environment, tuned by the inorganic (TiO2 mass) to organic (polymer) ratio, is shown to be a decisive factor in determining the distribution of sub-bandgap electronic states and the associated electronic function in solid-state dye-sensitized solar cells. Interestingly, the tuning of the sub-bandgap states does not appear to strongly influence the charge transport and recombination in the devices. However, increasing the depth and breadth of the density of sub-bandgap states correlates well with an increase in photocurrent generation, suggesting that a high density of these sub-bandgap states is critical for efficient photo-induced electron transfer and charge separation. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Citation:
Docampo P, Guldin S, Stefik M, Tiwana P, Orilall MC, et al. (2010) Control of Solid-State Dye-Sensitized Solar Cell Performance by Block-Copolymer-Directed TiO2 Synthesis. Advanced Functional Materials 20: 1787–1796. Available: http://dx.doi.org/10.1002/adfm.200902089.
Publisher:
Wiley-Blackwell
Journal:
Advanced Functional Materials
Issue Date:
21-Apr-2010
DOI:
10.1002/adfm.200902089
Type:
Article
ISSN:
1616-301X
Sponsors:
P. Docampo and S. Guldin contributed equally to this work. This work was funded in part by by the EPSRC Nanotechnology Grand Challenges Energy grant (EP/F056702/1), and EP/F065884/1, the Department of Energy (DE-FG02 87ER45298) through the Cornell Fuel Cell Institute (CFCI), the National Science Foundation (DMR-0605856), and the Cornell Universiy KAUST Center for Research and Education. S.H. acknowledges a scholarship of the Bayerische Graduiertenforderung and funding from European RTN-6 Network "Polyfilm". We thank Natalie Plank for her assistance with the SEM, Mathias Kolle for the graphic design and Dominik Eder for the nitrogen sorption measurements and useful discussions, Frederic Sauvage from EPFL for information concerning the porosity and surface area of the standard Dyesol Paste and Hidetoshi Miura from Chemicrea inc. Japan for supplying the D102 sensitizer. Supporting Information is available online from Wiley InterScience or from the authors.
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Full metadata record

DC FieldValue Language
dc.contributor.authorDocampo, Pabloen
dc.contributor.authorGuldin, Stefanen
dc.contributor.authorStefik, Morganen
dc.contributor.authorTiwana, Pritien
dc.contributor.authorOrilall, M. Christopheren
dc.contributor.authorHüttner, Svenen
dc.contributor.authorSai, Hiroakien
dc.contributor.authorWiesner, Ulrichen
dc.contributor.authorSteiner, Ulrichen
dc.contributor.authorSnaith, Henry J.en
dc.date.accessioned2016-02-25T12:57:54Zen
dc.date.available2016-02-25T12:57:54Zen
dc.date.issued2010-04-21en
dc.identifier.citationDocampo P, Guldin S, Stefik M, Tiwana P, Orilall MC, et al. (2010) Control of Solid-State Dye-Sensitized Solar Cell Performance by Block-Copolymer-Directed TiO2 Synthesis. Advanced Functional Materials 20: 1787–1796. Available: http://dx.doi.org/10.1002/adfm.200902089.en
dc.identifier.issn1616-301Xen
dc.identifier.doi10.1002/adfm.200902089en
dc.identifier.urihttp://hdl.handle.net/10754/597858en
dc.description.abstractHybrid dye-sensitized solar cells are typically composed of mesoporous titania (TiO2), light-harvesting dyes, and organic molecular hole-transporters. Correctly matching the electronic properties of the materials is critical to ensure efficient device operation. In this study, TiO 2 is synthesized in a welldefined morphological confinement that arises from the self-assembly of a diblock copolymer - poly(isoprene-b-ethylene oxide) (Pl-b-PEO). The crystallization environment, tuned by the inorganic (TiO2 mass) to organic (polymer) ratio, is shown to be a decisive factor in determining the distribution of sub-bandgap electronic states and the associated electronic function in solid-state dye-sensitized solar cells. Interestingly, the tuning of the sub-bandgap states does not appear to strongly influence the charge transport and recombination in the devices. However, increasing the depth and breadth of the density of sub-bandgap states correlates well with an increase in photocurrent generation, suggesting that a high density of these sub-bandgap states is critical for efficient photo-induced electron transfer and charge separation. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.en
dc.description.sponsorshipP. Docampo and S. Guldin contributed equally to this work. This work was funded in part by by the EPSRC Nanotechnology Grand Challenges Energy grant (EP/F056702/1), and EP/F065884/1, the Department of Energy (DE-FG02 87ER45298) through the Cornell Fuel Cell Institute (CFCI), the National Science Foundation (DMR-0605856), and the Cornell Universiy KAUST Center for Research and Education. S.H. acknowledges a scholarship of the Bayerische Graduiertenforderung and funding from European RTN-6 Network "Polyfilm". We thank Natalie Plank for her assistance with the SEM, Mathias Kolle for the graphic design and Dominik Eder for the nitrogen sorption measurements and useful discussions, Frederic Sauvage from EPFL for information concerning the porosity and surface area of the standard Dyesol Paste and Hidetoshi Miura from Chemicrea inc. Japan for supplying the D102 sensitizer. Supporting Information is available online from Wiley InterScience or from the authors.en
dc.publisherWiley-Blackwellen
dc.titleControl of Solid-State Dye-Sensitized Solar Cell Performance by Block-Copolymer-Directed TiO2 Synthesisen
dc.typeArticleen
dc.identifier.journalAdvanced Functional Materialsen
dc.contributor.institutionUniversity of Cambridge, Cambridge, United Kingdomen
dc.contributor.institutionUniversity of Oxford, Oxford, United Kingdomen
dc.contributor.institutionUniversitat Freiburg im Breisgau, Freiburg im Breisgau, Germanyen
dc.contributor.institutionCornell University, Ithaca, United Statesen
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