A photo-physical and electrochemical impedance spectroscopy study on the quasi-solid state dye-sensitized solar cells based on poly(vinylidene fluoride-co-hexafluoropropylene)
Resource
JOURNAL OF POWER SOURCES,185(2),1605-1612.
Journal
Journal of Power Sources
Journal Volume
185
Journal Issue
2
Pages
1605-1612
Date Issued
2008
Author(s)
Abstract
Quasi-solid state dye-sensitized solar cells (DSSCs) were fabricated with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) in methoxy propionitrile (MPN) as gel polymer electrolyte (GPE), tetrabutylammonium iodide (TBAI)/iodine (I2) as redox couple, 4-tertiary butyl pyridine (TBP) as additive and silica nanoparticles as fillers. The energy conversion efficiency of the cell with 5 wt% PVDF-HFP is comparable to that one obtained in liquid electrolyte system. Solar cell containing PVDF-HFP with 0.8 M of TBAI and 0.12 M of I2 shows maximum short-circuit current density (JSC). Further, tertiary butyl pyridine (TBP) has little effect in improving the performance of the solar cell. Moreover, the addition of 1 wt% silica nanoparticles is found to improve the at-rest durability and the performance of the solar cell. The transient photovoltage and photocurrent measurements were employed to find out the electron lifetimes in TiO2 electrode with different weight percentages of PVDF-HFP, various concentrations of I2 and durability of the cell storage at 70 °C. A photocurrent density of 14.04 mA cm-2, an open-circuit voltage of 0.71 V, a fill factor of 0.598 and an overall conversion efficiency of 5.97% under 100 mW cm-2 was observed for the best performance of a solar cell in this work. Crown Copyright © 2008.
Subjects
Dye-sensitized solar cells; EIS; Gel polymer electrolyte; PVDF-HFP
SDGs
Other Subjects
ABS resins; Cells; Colloids; Conversion efficiency; Cytology; Durability; Electrochemical corrosion; Electrochemical impedance spectroscopy; Electrolysis; Electrolytes; Energy conversion; Gelation; Gels; Iodine; Lithium batteries; Nanoparticles; Nanostructures; Photocurrents; Photoelectrochemical cells; Photovoltaic cells; Polyelectrolytes; Polymers; Pyridine; Silica; Solar cells; Solar equipment; Switching circuits; Circuit voltages; Dye-sensitized solar cells; EIS; Electrochemical impedances; Electron lifetimes; Fill factors; Gel polymer electrolyte; Gel polymer electrolytes; Hexafluoro propylenes; Liquid electrolyte systems; Methoxy; Overall conversion efficiencies; Photocurrent densities; Photocurrent measurements; Photovoltage; Propionitrile; PVDF-HFP; Redox couples; Silica nanoparticles; Solid states; Tetrabutylammonium iodides; Vinylidene fluorides; Weight percentages; Solar energy
Type
journal article
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