2SK-4 Development of Electrocatalysts Based on Porous Carbons as the Counter Electrodes for Dye-Sensitized Solar Cells = 2SK-4 Development of Electrocatalysts Based on Porous Carbons as the Counter Electrodes for Dye-Sensitized Solar Cells

다국어 초록 (Multilingual Abstract)

Nanocomposites of cobalt or nickel species and N-doped mesoporous carbon as well as tungsten carbide imbedded in N-doped hierarchical hollow mesoporous carbon were prepared for replacing Pt as the electrocatalysts on the counter electrodes (CEs) of dye-sensitized solar cells (DSCs). It is shown that the obtained nanocomposite carbon materials significantly improve the electrocatalytic activity toward the reduction of I₃^- compared to bared porous carbons. The prepared nanocomposite carbon materials with enhanced electrochemical stability are the benefit to combining high electrical conductivity and electrocatalytic activity into one material in which Co or Ni species as well as WC serve as the electrocatalysts and N-doped mesoporous carbon as well as N-doped hierarchical hollow mesoporous carbon serves as the electrical conductors. The fabricated nanocomposite carbon materials based DSCs show the best light-to-electricity conversion efficiency (η) which are higher than those of the cells with bared porous carbons CEs and are comparable to that of the cell with a platinized CE.