Dual Functions of Clay Nanoparticles with High Aspect Ratio in Dye-Sensitized Solar Cells
33
Citation
21
Reference
10
Related Paper
Citation Trend
Abstract:
We have prepared a quasi-solid-state electrolyte for dye-sensitized solar cells (DSSCs) that consist of a liquid electrolyte and a synthetic nanoclay in order to solidify a liquid electrolyte and to induce a light-scattering effect to increase cell performance. These clay-based quasi-solid-state electrolytes offer unexpected benefits over liquid electrolyte due to their light-scattering effect. The best DSSC result is a short-circuit current of , an open-circuit voltage of , a fill factor of 0.64, and an overall energy-conversion efficiency of 7.10% at [air mass (AM) 1.5].Keywords:
Quasi-solid
Open-circuit voltage
Energy transformation
Highly efficient quasi-solid-state dye-sensitized solar cells (QS-DSSCs) are fabricated using nanocomposite gel electrolytes and applied under room light conditions (200 lx). To obtain high energy conversion efficiency in QS-DSSCs, the important components of the DSSC are systematically optimized based on their performance in liquid-state DSSCs. It shows that the liquid cell using the 3-methoxypropionitrile-based cobalt electrolyte has higher efficiency (18.91%) than the cell using the acetonitrile-based electrolyte (17.82%) under 200 lx illumination due to the higher charge recombination resistance at the photoelectrode/electrolyte interface for the 3-methoxypropionitrile system. Poly(vinylidene fluoride-co-hexafluoropropylene) is utilized as the gelator of the liquid electrolytes to prepare polymer gel electrolytes. Furthermore, to improve the performance of the QS-DSSCs, different metal oxide nanoparticles are introduced as nanofillers of the polymer gel electrolytes. It shows that the zinc oxide nanofillers have a superior performance in increasing the cell efficiency and the energy conversion efficiencies of the QS-DSSCs are higher than those of the corresponding liquid cells. By regulating the concentration of the zinc oxide nanofillers, the efficiency of the 3-methoxypropionitrile based QS-DSSC can achieve a value of 20.11% under 200 lx illumination. This QS-DSSC has a long-term stability at 35 °C.
Quasi-solid
Cite
Citations (42)
Quasi-solid
Polyvinyl Alcohol
Cite
Citations (81)
Quasi-solid
Cite
Citations (30)
Quasi-solid
Photocurrent
Open-circuit voltage
Cite
Citations (4)
Quasi-solid
Cite
Citations (33)
Abstract DSSCs based on quasi-solid type of electrolytes were prepared to investigate the influence of ionic mobility and recombination kinetics in electrolytes on DSSC performances. The improved ionic mobility of electrolyte in PMMA system resulted in the enhancement of Jsc value in DSSC which was well confirmed with the incident photon-to-current spectra and the impedance analysis. Furthermore, the retarded recombination rate from TiO2 electrode to electrolyte in PMMA system enhanced the electron life time of DSSC in the photoanode. DSSCs based on quasi-solid type of electrolytes composed of PMMA showed a power conversion efficiency of 3.36% underAM 1.5 illumination (100 mWcm−2) in an photo active area of 0.24 cm2, short circuit current density of 7.69 mAcm−2, open circuit photo voltage of 0.69 Vandafill-factor of 64%. Keywords: Dye-sensitized solar cellsionic mobility of electrolytephotovoltaic performancesPMMA and PEO electrolytequasi-solid type of DSSC Acknowledgment This research was financially supported by the Ministry of Education, Science Technology (MEST) and Korea Industrial Technology Foundation (KOTEF) through the Human Resource Training Project for Regional Innovation. Notes a R1 is FTO Interface resistance. b R2 is due to the resistance at the interface between the counter electrode and the electrolyte. c R3 is possibly originated from the backward charge transfer from TiO2 to the electrolyte and the electron conduction in porous TiO2 film. d τis life time of an electron in DSSC. J. H. Kim and K.-S. Ahn contributed equally to this work as the corresponding authors.
Quasi-solid
Cite
Citations (0)
Quasi-solid
Photocurrent
Cite
Citations (8)
We have prepared a quasi-solid-state electrolyte for dye-sensitized solar cells (DSSCs) that consist of a liquid electrolyte and a synthetic nanoclay in order to solidify a liquid electrolyte and to induce a light-scattering effect to increase cell performance. These clay-based quasi-solid-state electrolytes offer unexpected benefits over liquid electrolyte due to their light-scattering effect. The best DSSC result is a short-circuit current of , an open-circuit voltage of , a fill factor of 0.64, and an overall energy-conversion efficiency of 7.10% at [air mass (AM) 1.5].
Quasi-solid
Open-circuit voltage
Energy transformation
Cite
Citations (33)
Quasi-solid
Auxiliary electrode
Open-circuit voltage
Cite
Citations (34)
Quasi-solid state dye-sensitized solar cells (DSSCs) were assembled by in-situ chemical cross-linking of a gel electrolyte precursor containing liquid electrolyte. The DSSCs assembled with this cross-linked gel polymer electrolyte showed higher open circuit voltage and lower short-circuit photocurrent density than those of DSSCs with liquid electrolyte. Addition of SiO2 nanoparticles into the cross-linked gel polymer electrolyte significantly improved the photovoltaic performance and long-term stability of the DSSCs. The optimized quasi-solid state DSSC showed high conversion efficiency, 6.2% at 100 mW cm−2 with good durability.
Quasi-solid
Photocurrent
Open-circuit voltage
Cite
Citations (41)