Journal article 1331 views
Impedance Characteristics of Transparent GNP-Pt Ink Catalysts for Flexible Dye Sensitized Solar Cells
,
Trystan Watson ,
James McGettrick ,
Jenny Baker
Journal of the Electrochemical Society, Volume: 162, Issue: 8, Pages: H564 - H569
Swansea University Authors:
David Gethin , Trystan Watson , James McGettrick , Jenny Baker
Full text not available from this repository: check for access using links below.
DOI (Published version): 10.1149/2.0961508jes
Abstract
By thermally reducing platinum onto the surface of Graphene Nanoplatelet (GNP) particles the catalytic activity of the iodide/triiodide reaction in dye-sensitized solar cells (DSC) can be improved significantly. The GNP-Pt particles can be used to formulate a highly catalytic yet transparent ink, wh...
| Published in: | Journal of the Electrochemical Society |
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| ISSN: | 0013-4651 |
| Published: |
2015
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa22358 |
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| Abstract: |
By thermally reducing platinum onto the surface of Graphene Nanoplatelet (GNP) particles the catalytic activity of the iodide/triiodide reaction in dye-sensitized solar cells (DSC) can be improved significantly. The GNP-Pt particles can be used to formulate a highly catalytic yet transparent ink, which can be deposited by a number of different technologies such as flexographic printing, K-bar, slot-die and spin coating. The catalytic performance of the ink has been characterized using impedance spectroscopy, the impedance spectra show a high frequency impedance curve often seen in carbon electrodes. The origin of this impedance has a number of opposing hypotheses which are critically examined. The data supports the hypothesis that the high frequency curve is due to a contact resistance between the GNP-Pt ink and the FTO. In addition to the high frequency curve, a previously unresolved low frequency impedance is identified. When fabricated into DSCs the ink catalyst demonstrates cell efficiencies up to 5.2% and is shown to have a similar performance to conventional sputtered platinum when used in a reverse illuminated DSC (through the counter electrode). The first flexible reverse illuminated DSC with a GNP-Pt ink catalyst, suitable for roll-to-roll deposition is reported with an efficiency of 2.6%. |
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| Keywords: |
catalyst, dye-sensitized, flexible, graphene, impedence, ink, platinum |
| College: |
Faculty of Science and Engineering |
| Issue: |
8 |
| Start Page: |
H564 |
| End Page: |
H569 |