TY - JOUR
T1 - Effects of dye-adsorption solvent on the performances of the dye-sensitized solar cells based on black dye
AU - Ozawa, Hironobu
AU - Awa, Megumi
AU - Ono, Takahiko
AU - Arakawa, Hironori
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/1/2
Y1 - 2012/1/2
N2 - The effects of the dye-adsorption solvent on the performances of the dye-sensitized solar cells (DSSCs) based on black dye have been investigated. The highest conversion efficiency (10.6 %) was obtained in the cases for which 1-PrOH and the mixed solvent of EtOH and tBuOH (3:1 v/v) were employed as dye-adsorption solvents. The optimized value for the dielectric constant of the dye-adsorption solvent was found to be around 20. The DSSCs that used MeOH as a dye-adsorption solvent showed inferior solar-cell performance relative to the DSSCs that used EtOH, 1-PrOH, 2-PrOH, and 1-BuOH. Photo- and electrochemical measurements of black dye both in solution and adsorbed onto the TiO 2 surface revealed that black dye aggregates at the TiO 2 surface during the adsorption process in the case for MeOH. Both the shorter electron lifetime in the TiO 2 photoelectrode and the greater resistance in the TiO 2-dye-elecrolyte interface, attributed to the dye aggregation at the TiO 2 surface, cause the decrease in the solar-cell performance of the DSSC that used MeOH as a dye adsorption solvent. Black power: The conversion efficiency of the dye-sensitized solar cell based on black dye (see figure) strongly depends on the dielectric constant of the dye-adsorption solvent.
AB - The effects of the dye-adsorption solvent on the performances of the dye-sensitized solar cells (DSSCs) based on black dye have been investigated. The highest conversion efficiency (10.6 %) was obtained in the cases for which 1-PrOH and the mixed solvent of EtOH and tBuOH (3:1 v/v) were employed as dye-adsorption solvents. The optimized value for the dielectric constant of the dye-adsorption solvent was found to be around 20. The DSSCs that used MeOH as a dye-adsorption solvent showed inferior solar-cell performance relative to the DSSCs that used EtOH, 1-PrOH, 2-PrOH, and 1-BuOH. Photo- and electrochemical measurements of black dye both in solution and adsorbed onto the TiO 2 surface revealed that black dye aggregates at the TiO 2 surface during the adsorption process in the case for MeOH. Both the shorter electron lifetime in the TiO 2 photoelectrode and the greater resistance in the TiO 2-dye-elecrolyte interface, attributed to the dye aggregation at the TiO 2 surface, cause the decrease in the solar-cell performance of the DSSC that used MeOH as a dye adsorption solvent. Black power: The conversion efficiency of the dye-sensitized solar cell based on black dye (see figure) strongly depends on the dielectric constant of the dye-adsorption solvent.
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U2 - 10.1002/asia.201100484
DO - 10.1002/asia.201100484
M3 - Article
C2 - 22114015
AN - SCOPUS:84255205677
SN - 1861-4728
VL - 7
SP - 156
EP - 162
JO - Chemistry - An Asian Journal
JF - Chemistry - An Asian Journal
IS - 1
ER -