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

作     者：Qingwen Sun Yuan Lin 

作者机构：CAS Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of Sciences University of Chinese Academy of Sciences 

出 版 物：《Chinese Science Bulletin》 (科学通报(英文版))

年 卷 期：2014年第59卷第34期

页      面：4735-4740页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 

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

主　　题：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 

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.