Effect of Cation on Dye Regeneration Kinetics of N719-Sensitized TiO2 Films in Acetonitrile-Based and Ionic-Liquid-Based Electrolytes Investigated by Scanning Electrochemical Microscopy

2012 ◽  
Vol 116 (6) ◽  
pp. 4316-4323 ◽  
Author(s):  
Ushula Mengesha Tefashe ◽  
Kazuteru Nonomura ◽  
Nikolaos Vlachopoulos ◽  
Anders Hagfeldt ◽  
Gunther Wittstock
Keyword(s):  
Ionic Liquid ◽  
Scanning Electrochemical Microscopy ◽  
Tio2 Films ◽  
Dye Regeneration ◽  
Kinetics Of ◽  
Electrochemical Microscopy

INVESTIGATION OF DYE-REGENERATION KINETICS AT DYE-SENSITIZED p-TYPE CuCrO2 FILM/ELECTROLYTES INTERFACE WITH SCANNING ELECTROCHEMICAL MICROSCOPY

NANO ◽  
2014 ◽  
Vol 09 (05) ◽  
pp. 1440008 ◽  
Author(s):  
GETACHEW ALEMU ◽  
BINGYAN ZHANG ◽  
JUNPENG LI ◽  
XIAOBAO XU ◽  
JIN CUI ◽  
...  
Keyword(s):  
Dye Sensitized Solar Cells ◽  
Scanning Electrochemical Microscopy ◽  
Hole Injection ◽  
Kinetic Rate Constant ◽  
Dye Sensitized ◽  
Mesoporous Film ◽  
Dye Regeneration ◽  
P Type ◽  
Kinetics Of ◽  
Electrochemical Microscopy

The power conversion efficiency of p-type dye-sensitized solar cells (DSSC) is determined by the kinetics of hole injection and dye-regeneration reaction at the dye/electrolyte interface. In this work, the photochemical regeneration kinetics of dye adsorbed on CuCrO 2 mesoporous film was investigated by using scanning electrochemical microscopy with feedback mode. Organic P1 and C343 sensitizers in combination with iodide-based and thiolate-based electrolytes were selected to understand the effect of sensitizers and redox shuttles on dye-regeneration process. A fast regeneration kinetic rate constant was confirmed in thiolate-based sample compared with iodide-based electrolyte, indicating that the organic redox shuttle was an efficient mediator to optimize the performance of p-type DSSC.

scholarly journals Effect of TiO2 Photoanodes Morphology and Dye Structure on Dye-Regeneration Kinetics Investigated by Scanning Electrochemical Microscopy

Electrochem ◽  
2020 ◽  
Vol 1 (3) ◽  
pp. 329-343
Author(s):  
Sabina Scarabino ◽  
Kazuteru Nonomura ◽  
Nick Vlachopoulos ◽  
Anders Hagfeldt ◽  
Gunther Wittstock
Keyword(s):  
Porous Electrode ◽  
Dye Sensitized Solar Cells ◽  
Scanning Electrochemical Microscopy ◽  
Transfer Reactions ◽  
Dye Sensitized ◽  
Ticl4 Treatment ◽  
Back Electron Transfer ◽  
Dye Regeneration ◽  
Sensitized Solar Cells ◽  
Electrochemical Microscopy

The dye regeneration in dye-sensitized solar cells (DSSCs) is improved by optimizing the charge separation at the level of the sensitized semiconductor treatment of the mesoporous electrode by TiCl4 that passivates the surface for back electron transfer reactions. The dye-regeneration kinetics is analyzed for DN216- and D358-sensitized porous TiO2 electrodes with and without a TiCl4 treatment by means of scanning electrochemical microscopy (SECM). Different mass transport limitation of the [Co(bpy)3]3+ mediator through the porous electrode is found for the comparison of the structurally similar dyes but cannot be detected for the thin layer introduced by the TiCl4 treatment. Phototransient measurements are conducted directly in the SECM cell without any intermediated sample manipulation. The results from those measurements corroborate the findings from steady state SECM measurements.

Evaluation of Enzymatic Kinetics of GOx-based Electrodes by Scanning Electrochemical Microscopy at Redox Competition Mode

2017 ◽  
Vol 29 (6) ◽  
pp. 1532-1542 ◽  
Author(s):  
Inga Morkvenaite-Vilkonciene ◽  
Almira Ramanaviciene ◽  
Povilas Genys ◽  
Arunas Ramanavicius
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Enzymatic Kinetics ◽  
Competition Mode ◽  
Kinetics Of ◽  
Electrochemical Microscopy

Investigation of Dye Regeneration Kinetics in Sensitized Solar Cells by Scanning Electrochemical Microscopy

ChemPhysChem ◽  
2014 ◽  
Vol 15 (6) ◽  
pp. 1182-1189 ◽  
Author(s):  
Bingyan Zhang ◽  
Xiaobao Xu ◽  
Xiaofan Zhang ◽  
Dekang Huang ◽  
Shaohui Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Scanning Electrochemical Microscopy ◽  
Dye Regeneration ◽  
Sensitized Solar Cells ◽  
Electrochemical Microscopy
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