On the photophysical and electrochemical studies of dye-sensitized solar cells with the new dye CYC-B1

Chen, J.-G.J.-G.ChenChen, C.-Y.C.-Y.ChenWu, S.-J.S.-J.WuLi, J.-Y.J.-Y.LiWu, C.-G.C.-G.WuKUO-CHUAN HO2018-09-102018-09-102008http://www.scopus.com/inward/record.url?eid=2-s2.0-55349086153&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/338755In this study, the photoelectrochemical characteristics of a ruthenium photosensitizer with an alkyl bithiophene group, designated as CYC-B1, are studied. The effect of mesoporous TiO2 film thickness on the photovoltaic performance of CYC-B1 and N3 dye-sensitized solar cells was investigated. The performance of the dye-sensitized nanocrystalline TiO 2 solar cells (DSSC) fabricated using CYC-B1 dye-anchored TiO 2 photoelectrode showed a convincing enhancement in cell efficiency when the TiO2 film thickness was increased from 3 μm (eff. = 5.41%) to 6 μm (eff. = 7.1935). The efficiency of the CYC-B1 -sensitized DSSC was maximum at 6 μm of the TiO2 film thickness, reached its limiting value and remained constant up to 53 μm, although a similar trend was also observed for N3 dye-sensitized DSSC, however, the maximum efficiency achieved was only at 27 μm thickness (eff. = 6.75%). As expected, the photocurrent density generated in the DSSC modified by CYC-B1 dye is larger than that from N3 dye. The effect of guanidinium thiocyanate (GuSCN) (additive) addition to the electrolyte on the photovoltaic performance of DSSCs based on CYC-B1 was also investigated. Furthermore, the electrochemical impedance spectroscopy (EIS) technique and photo-transient laser method have been employed to analyze the charge transfer resistances (Rct) and the lifetime of the injected electrons on the TiO2 containing different thicknesses. © 2008 Elsevier B.V. All rights reserved.application/pdfapplication/pdfDye-sensitized solar cells; Nanocrystallined TiO2; Ruthenium photosensitizer[SDGs]SDG7Charge transfer; Dyes; Efficiency; Electrochemical impedance spectroscopy; Electrolytes; Film thickness; Nanocrystals; Photosensitizers; Photovoltaic effects; Ruthenium; Solar cells; Solar power generation; Titanium dioxide; Charge transfer resistance; Electrochemical studies; Injected electrons; Maximum Efficiency; Nano-crystalline TiO; Photocurrent density; Photoelectrochemical characteristics; Photovoltaic performance; Dye-sensitized solar cellsOn the photophysical and electrochemical studies of dye-sensitized solar cells with the new dye CYC-B1journal article10.1016/j.solmat.2008.08.005