Papers by Author: Gui Qiang Wang

Abstract: Ordered Mesoporous Silica with Uniform Pore Size Was Prepared by Using Pluronic P123 as the Structure-Directing Agent. their Characteristics Were Analysized by TEM and a N₂ Adsorption System. Ionic Liquid-Based Gel Electrolyte Was Fabricated by Using Ordered Mesoporous Silica as the Framework Materials to Solidify Ionic Liquid Electrolyte. the Diffusion Coefficient of I₃^- in Gel Electrolyte Is Higher than that in Ionic Liquid Electrolyte due to the Formation of Favorable Channel for I₃^- Diffusion. the Optimized Overall Conversion Efficiency of Dye-Sensitized Solar Cells with Ionic Liquid-Based Gel Electrolyte Was 5.22% under Irradiation of 60 MW Cm^-2.

Abstract: Mesoporous carbon (MC) materials with surface area of 400 m²g^-1 were prepared and incorporated into the polymer gel electrolyte comprising of polyvinylidene fluoride and 1-methyl-3-hexylimidazolium iodide to fabricate the composite gel electrolytes. The photovoltaic performance of the quasi-solid-state dye-sensitized solar cells was improved through incorporating MC into electrolyte. The dye-sensitized solar cell with composite gel electrolyte containing 3 wt% MC achieved the best photovoltaic performance, and the corresponding open-circuit voltage, short-circuit current density, fill factor and overall conversion efficiency were 0.59V, 13.22 mAcm^-2, 0.66 and 5.15%, respectively. The stability of dye-sensitized solar cells with composite gel electrolyte was far superior to the cell with organic liquid electrolyte.

Abstract: Hierarchical porous carbons (HPC) were synthesized by a combination of self-assembly and chemical activation method. A mesoporous carbon with large-size pore was used as raw materials. N₂ sorption measurement indicated that plenty of micropores generated within the mesopore wall in the mesoporous carbon during KOH activation. Electrochemical impedance spectroscopy measurement demonstrated a high electrocatalytic activity of HPC electrode for triiodide reduction. The overall conversion efficiency of dye-sensitized solar cells with HPC counter electrode was 6.48%, which is similar to that of the device with conventional Pt counter electrode.

Abstract: Mesoporous carbon (MC) materials with wormhole-like mesopores were prepared and incorporated into the polymer gel electrolyte comprising of polyvinylidene fluoride and 1-methyl-3-hexylimidazolium iodide. These gel composites were employed as the electrolyte for quasi-solid-state dye-sensitized solar cells. The photovoltaic performance of the quasi-solid-state dye-sensitized solar cells improved through incorporating MC into electrolyte. The dye-sensitized solar cell with composite gel electrolyte containing 3 wt% MC achieved the best photovoltaic performance, and the corresponding open-circuit voltage, short-circuit current density, fill factor and overall conversion efficiency were 0.59V, 13.22 mAcm-2, 0.66 and 5.15%, respectively. The stability of dye-sensitized solar cells with composite gel electrolyte was found to be far superior to the cell with organic liquid electrolyte.