摘要
Hierarchical porous carbon is prepared by a combination of self-organization and chemical activation and explored as counter electrode for dye-sensitized solar cells.Pore structure analysis shows that micropores generated within the mesopore wall and the pristine mesopore structure of mesoporous carbon are preserved during KOH activation.Electrochemical impedance spectroscopy studies demonstrate a relatively high electrocatalytic activity of hierarchical porous carbon electrode for triiodide reduction,as compared with a pristine mesoporous carbon electrode.This enhanced electrocatalytic activity is beneficial for improving the photovoltaic performance of dyesensitized solar cells.The overall conversion efficiency of dye-sensitized solar cells with the hierarchical porous carbon electrode increased by 11.5%compared with that of the cell with a pristine mesoporous carbon electrode.
基金
Supported by the National Natural Science Foundation of China under Grant No 20773082
Shandong Natural Science Foundation under Grant No ZR2010BM038.
