The adsorption of 4-tert-butylpyridine on the nanocrystalline TiO2 and Raman spectra of dye-sensitized solar cells in situ

Shi, Chengwu; Dai, Songyuan; Wang, Kongjia; Pan, Xu; Kong, Fantai; Hu, Linhua

doi:10.1016/j.vibspec.2005.01.002

Cited by 74 publications

(59 citation statements)

References 23 publications

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“…Based on the literature of the Raman peak for 4-tBP should appear at 996 cm -1 and that for NMBI around 1360 cm -1 . 15,16 However, Figure 2b does not show any peaks in those regions which apparently means that the 4-tBP and NMBI have very weak…”

Section: Raman Spectroscopymentioning

confidence: 90%

Effect of molecular filtering and electrolyte composition on the spatial variation in performance of dye solar cells

Miettunen

Asghar

Mastroianni

et al. 2012

Journal of Electroanalytical Chemistry

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It is demonstrated that the molecular filtering effect of TiO2 has a significant influence on dye solar cell (DSC) performance. As electrolyte is injected to a DSC, some of the electrolyte components adsorb to the surface TiO2 (here 4-tert-butylpyridine and 1-methylbenzimidazole) and accumulate near the electrolyte filling hole resulting in varying electrolyte composition and performance across the cell. The spatial performance distribution was investigated with a new method, the segment cell method. Not only is the segmented cell method simple and cheap when compared to the only other method for examining spatial variation (photocurrent mapping), it also has the major advantage of allowing the spatial variation in all other operating parameters to be assessed. Here the molecular filtering effect was to influence the cell performance in case of all the five studied electrolytes causing up to 35 % losses in efficiency. Raman spectra indicated that the loss in photocurrent in the electrolyte filling was in correlation with the loss of thiocyanate ligands suggesting that dye regeneration may also be a significant factor in addition to electron injection in some of the cells. There were also shifts in the absorption spectra the photoelectrodes which further supported changes in the thiocyanate ligands.Besides absorption changes, there were additional shifts in the IPCE spectra which may relate to deprotonation of the dye. The efficiency losses were reduced to ~10 % with contemporary electrolyte compositions.

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Section: Raman Spectroscopymentioning

confidence: 90%

Effect of molecular filtering and electrolyte composition on the spatial variation in performance of dye solar cells

Miettunen

Asghar

Mastroianni

et al. 2012

Journal of Electroanalytical Chemistry

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“…Liquid electrolyte could be divided into organic solvent electrolyte and ionic liquid electrolyte according to the solvent used. Organic solvent electrolytes were widely used and investigated in dye-sensitized solar cells for their low viscosity, fast ion diffusion, high efficiency, easy to be designed, and high pervasion into nanocrystalline film electrode [2][3][4][5][6][7][65][66][67][68]. The composition of the electrolytes includes organic solvent, redox couple, and additive.…”

Section: Electrolytementioning

confidence: 99%

Review of Recent Progress in Dye-Sensitized Solar Cells

Kong

Dai

Wang

2007

Advances in OptoElectronics

141

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We introduced the structure and the principle of dye-sensitized solar cell (DSC). The latest results about the critical technology and the industrialization research on dye-sensitized solar cells were reviewed. The development of key components, including nanoporous semiconductor films, dye sensitizers, redox electrolyte, counter electrode, and conducting substrate in dye-sensitized solar cells was reviewed in detail. The developing progress and prospect of dye-sensitized solar cells from small cells in the laboratory to industrialization large-scale production were reviewed. At last, the future development of DSC was prospective for the tendency of dye-sensitized solar cells.

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“…This phenomenon could possibly explain the effect of 4tBP observed on photoinduced electron injection efficiency in nanocrystalline TiO 2 films sensitized by black dye. [35] Investigations to support this evidence are currently under way in this laboratory.…”

Section: Introductionmentioning

confidence: 95%

“…In addition, studies also have shown that the addition of 4tBP to the electrolyte in dye-sensitized solar cell [29 -34] increases the open-circuit voltage and improves the long-term stability of the cell. More recently, using resonance Raman scattering and transient absorption spectroscopy, it was observed that the photoinduced electron injection efficiency in nanocrystalline TiO 2 films sensitized by black dye [35,36] decreases with the addition of 4tBP.…”

Section: Introductionmentioning

confidence: 99%

Surface‐enhanced Raman spectroscopy of 4‐tert‐butylpyridine on a silver electrode

Livingstone

Lombardi

2011

J Raman Spectroscopy

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We report the observation of large surface-enhanced Raman scattering (SERS) (10 6 ) for 4-tert-butylpyridine molecules adsorbed on a silver electrode surface in an electrochemical cell with electrode potential set at −0.5 V. A decrease in electrode potential to −0.3 V was accompanied by a decrease in relative intensities of the vibrational modes. However, there were no changes in vibrational wavenumbers. Comparison of both normal solution Raman and SERS spectra shows very large enhancement of the intensities of a 1 , a 2 , and b 2 modes at laser excitation of 488 nm. Enhancement of the non-totally symmetric modes indicates the presence of charge transfer as a contributor to the enhancement.

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The adsorption of 4-tert-butylpyridine on the nanocrystalline TiO2 and Raman spectra of dye-sensitized solar cells in situ

Cited by 74 publications

References 23 publications

Effect of molecular filtering and electrolyte composition on the spatial variation in performance of dye solar cells

Effect of molecular filtering and electrolyte composition on the spatial variation in performance of dye solar cells

Review of Recent Progress in Dye-Sensitized Solar Cells

Surface‐enhanced Raman spectroscopy of 4‐tert‐butylpyridine on a silver electrode

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