摘要
Anatase titanium dioxide nanowire arrays were prepared by hydrothermally oxidizing titanium foils in aqueous alkali and transferred onto fluorinated tin oxide(FTO)glass for use as the photoanodes of front side illuminated dye-sensitized solar cells(DSCs).Electrochemical impedance spectroscopy(EIS)measurement was applied to compare the electron transport and recombination properties of DSCs using TiO2nanowire films and TiO2nanoparticle films as photoanodes.It was found that the nanowire array films possess smaller electron transport resistance(Rt)and larger electron diffusion length(Le)in the photoanodes,suggesting that the nanowire arrays can enhance the electron transport rate and have a potential to improve the charge collection efficiency of DSCs.
Anatase titanium dioxide nanowire arrays were prepared by hydrothermally oxidizing titanium foils in aqueous alkali and transferred onto fluorinated tin oxide （FTO） glass for use as the photoanodes of front side illuminated dye-sensitized solar cells （DSCs）. Electrochemical impedance spectroscopy （EIS） measurement was applied to compare the electron transport and re- combination properties of DSCs using TiO2 nanowire films and TiO2 nanoparticle films as photoanodes. It was found that the nanowire array films possess smaller electron transport resistance （Rt） and larger electron diffusion length （Le） in the pho- toanodes, suggesting that the nanowire arrays can enhance the electron transport rate and have a potential to improve the charge collection efficiency of DSCs.
基金
supported by the National High Technology Research and Development Program of China(Grant Nos.2006AA03Z218 and 2011AA050522)
the Project of International Cooperation of the Ministry of Science and Technology of China(Grant No.2011DFA50530)
the Sanjiangyuan Scientific Program of Qinghai Science&Technology Department(Grant No.2010-N-S03)
