摘要
Vertically aligned Ti O2 nanotube arrays(*8 lm long, *110 nm wide) have been fabricated through anodic oxidation of Ti-metal sheet in fluoridecontaining electrolyte. By changing the volume ratio of ethylene glycol and diethylene glycol in the electrolyte,Ti O2 nanotube arrays with different tube-to-tube lateral spacing, i.e., closely packed, just separated, and fully separated, have been synthesized and applied as photoanodes for dye-sensitized solar cells(DSSCs). Photovoltaic efficiency of 2.99 %, 3.34 %, and 3.44 % has been obtained for DSSCs based on the closely packed, just separated, and fully separated Ti O2 nanotube arrays,respectively, illustrating the effect of tube-to-tube lateral spacing of Ti O2 nanotube arrays on the performances of DSSCs. It is suggested that fully separated Ti O2 nanotube arrays are beneficial to the conversion efficiency of DSSCs due to higher dye loading and faster electron transfer.
Vertically aligned TiO2 nanotube arrays （-8 μm long, -110nm wide） have been fabricated through anodic oxidation of Ti-metal sheet in fluoride- containing electrolyte. By changing the volume ratio of ethylene glycol and diethylene glycol in the electrolyte, TiO2 nanotube arrays with different tube-to-tube lateral spacing, i.e., closely packed, just separated, and fully separated, have been synthesized and applied as photoanodes for dye-sensitized solar cells （DSSCs）. Photovoltaic efficiency of 2.99 %, 3.34 %, and 3.44 % has been obtained for DSSCs based on the closely packed, just separated, and fully separated TiO2 nanotube arrays, respectively, illustrating the effect of tube-to-tube lateral spacing of TiO2 nanotube arrays on the performances of DSSCs. It is suggested that fully separated TiO2 nanotube arrays are beneficial to the conversion efficiency of DSSCs due to higher dye loading and faster electron transfer.
基金
supported by the National Basic Research Program of China(2012CB932903)
