No Cover Image

Journal article 442 views

Impedance Characteristics of Transparent GNP-Pt Ink Catalysts for Flexible Dye Sensitized Solar Cells / David, Gethin; Trystan, Watson; James, McGettrick; Jenny, Baker

Journal of the Electrochemical Society, Volume: 162, Issue: 8, Pages: H564 - H569

Swansesa University Authors: David, Gethin, Trystan, Watson, James, McGettrick, Jenny, Baker

Full text not available from this repository: check for access using links below.

Check full text

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...

Full description

Published in: Journal of the Electrochemical Society
ISSN: 0013-4651
Published: 2015
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa22358
Tags: Add Tag
No Tags, Be the first to tag this record!
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%.
Keywords: catalyst, dye-sensitized, flexible, graphene, impedence, ink, platinum
College: College of Engineering
Issue: 8
Start Page: H564
End Page: H569