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Cobalt(II/III) Redo...
Cobalt(II/III) Redox Electrolyte in ZnO Nanowire-Based Dye-Sensitized Solar Cells
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Fan, Jiandong (author)
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- Hao, Yan (author)
- Uppsala universitet,Fysikalisk kemi
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Cabot, Andreu (author)
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- Johansson, Erik M. J. (author)
- Uppsala universitet,Fysikalisk kemi
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- Boschloo, Gerrit (author)
- Uppsala universitet,Fysikalisk kemi
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- Hagfeldt, Anders (author)
- Uppsala universitet,Fysikalisk kemi
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(creator_code:org_t)
- 2013-03-07
- 2013
- English.
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In: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 5:6, s. 1902-1906
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- In this work, we explore the use of cobalt complex redox shuttles in dye sensitized solar cells (DSCs) based on ZnO nanowires (NWs). Arrays of vertically aligned ZnO NWs produced by a low-cost hydrothermal method are used to fabricate DSCs with [Co(bpy)(3)](2+/3+) as electrolyte. A direct comparison of the performance of [Co(bpy)(3)](2+/3+)-based ZnO DSC with I-/I-3(-)-based ones demonstrates the higher suitability of the cobalt complex, both in terms of a larger open circuit voltage (V-OC) and a higher photocurrent. The [Co(bpy)(3)](2+/3+) electrolyte results in V-OC enhancements above 200 mV. This V-OC increase is associated to the better match between the cobalt complex redox potential and the oxidation potential of the dye. The incident photon-to-current efficiency (IPCE) enhancement is attributed to a less competitive visible light absorption of the cobalt redox couple. Thus the present study opens new opportunities to improve energy conversion efficiency in ZnO-based DSCs.
Keyword
- cobalt complex redox shuttles
- ZnO nanowires
- dye sensitized solar cell
- photovoltaics
- energy
Publication and Content Type
- ref (subject category)
- art (subject category)
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