Please use this identifier to cite or link to this item: https://doi.org/10.1039/c0ee00519c
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dc.titleAn organic redox mediator for dye-sensitized solar cells with near unity quantum efficiency
dc.contributor.authorLiu, Y.
dc.contributor.authorJennings, J.R.
dc.contributor.authorParameswaran, M.
dc.contributor.authorWang, Q.
dc.date.accessioned2014-10-07T09:47:46Z
dc.date.available2014-10-07T09:47:46Z
dc.date.issued2011-02
dc.identifier.citationLiu, Y., Jennings, J.R., Parameswaran, M., Wang, Q. (2011-02). An organic redox mediator for dye-sensitized solar cells with near unity quantum efficiency. Energy and Environmental Science 4 (2) : 564-571. ScholarBank@NUS Repository. https://doi.org/10.1039/c0ee00519c
dc.identifier.issn17545692
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/86188
dc.description.abstractThe organic redox mediator tetramethylformaminium disulfide/ tetramethylthiourea was evaluated in dye-sensitized nanocrystalline TiO 2 solar cells, as an alternative to the conventional I 3 -/I- redox couple. Devices were optimized by judicious variation of electrolyte composition and selection of sensitizing dye. The best performance of the dye-sensitized solar cells incorporating this redox mediator was achieved by using a metal-free indoline-based sensitizer (D131). It was found that conventional ruthenium based sensitizers (e.g. Z907) exhibited inferior performance, possibly as a result of an insufficient driving force for sensitizer regeneration. A near unity incident photon-to-collected-electron conversion efficiency was achieved at low light intensity for optimized devices. The overall light-to-electric power conversion efficiency under AM 1.5 1 Sun illumination reached 3.88%. This represents an increase of ca. 25% compared with previously reported DSCs using this redox mediator. Factors limiting cell performance were further investigated using transient absorption spectroscopy and electrochemical impedance spectroscopy. © 2011 The Royal Society of Chemistry.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1039/c0ee00519c
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentMATERIALS SCIENCE AND ENGINEERING
dc.description.doi10.1039/c0ee00519c
dc.description.sourcetitleEnergy and Environmental Science
dc.description.volume4
dc.description.issue2
dc.description.page564-571
dc.identifier.isiut000286891500034
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