Chae, Sang Youn Hwang, Yun Jeong Choi, Jong-Ho Joo, Oh-Shim 2024-01-20T11:00:42Z 2024-01-20T11:00:42Z 2021-09-05 2013-12-30 0013-4686 https://pubs.kist.re.kr/handle/201004/127313 Recently, a cobalt complex based electrolyte such as [Co(bpy)(3)](2+/3+) was suggested to replace the conventional I-3(-)/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 J(sc) = 7.228 mA/cm(2), which is 13% higher than that with Pt (J(sc) = 6.443 mA/cm(2)), 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. (C) 2013 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD REDOX COUPLE MASS-TRANSPORT RECOMBINATION PERFORMANCE CAPACITANCE RESISTANCE REDUCTION SHUTTLES CO9S8 Cobalt sulfide thin films for counter electrodes of dye-sensitized solar cells with cobalt complex based electrolytes Article 10.1016/j.electacta.2013.10.038 1 ELECTROCHIMICA ACTA, v.114, pp.745 - 749 ELECTROCHIMICA ACTA 114 745 749 scie scopus 000330487800100 2-s2.0-84887576989 Electrochemistry Electrochemistry Article REDOX COUPLE MASS-TRANSPORT RECOMBINATION PERFORMANCE CAPACITANCE RESISTANCE REDUCTION SHUTTLES CO9S8 Dye-sensitized solar cells Cobalt complex electrolyte Cobalt sulfide Counter electrode Electrochemical impedance spectroscopy