Cobalt sulfide thin films for counter electrodes of dye-sensitized solar cells with cobalt complex based electrolytes

Title
Cobalt sulfide thin films for counter electrodes of dye-sensitized solar cells with cobalt complex based electrolytes
Authors
채상윤황윤정최종호주오심
Keywords
Dye-sensitized solar cells; Cobalt complex electrolyte; Cobalt sulfide; Counter electrode; Electrochemical impedance spectroscopy
Issue Date
2013-12
Publisher
Electrochimica acta
Citation
VOL 114, 745-749
Abstract
Recently, a cobalt complex based electrolyte such as [Co(bpy)3]2+/3+ was suggested to replace the conventional I3−/I− system because of its potential to provide high open circuit potential and power conversion efficiency in dye-sensitized solar cells (DSSCs). Here, a cobalt sulfide thin film was synthesized by electrochemical deposition and used for a counter electrode. A DSSC with the cobalt sulfide counter electrode exhibits Jsc = 7.228 mA/㎠, which is 13% higher than that with Pt (Jsc = 6.443 mA/㎠), thereby achieving an enhanced power conversion efficiency. Electrochemical impedance spectroscopy measurements indicate that the reduced Warburg diffusion impedance and faster adsorption of [Co(bpy)3]3+ facilitate the reduction of the cobalt complex.
URI
http://pubs.kist.re.kr/handle/201004/46640
ISSN
00134686
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE