Effect of TiO_2 nanotubes lateral spacing on photovoltaic properties of dye-sensitized solar cells  

作　　者：Qingwen Sun Yuan Lin 

机构地区：[1]CAS Key Laboratory of Photochemistry, Institute of Chemistry,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Chinese Science Bulletin》2014年第34期4735-4740,共6页

基　　金：supported by the National Basic Research Program of China(2012CB932903)

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.

关 键 词：染料敏化太阳能电池 二氧化钛纳米管 光电转换特性 间距 纳米管阵列 阳极氧化 紧密堆积 TiO2 

分 类 号：O614.411[理学—无机化学] TM914.4[理学—化学]