基于分层定向锐钛矿 TiO2 纳米结构阵列的柔性基底高效染料敏化太阳能电池。

Hierarchical oriented anatase TiO2 nanostructure arrays on flexible substrate for efficient dye-sensitized solar cells.

机构信息

MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, P R China.

出版信息

Sci Rep. 2013;3:1892. doi: 10.1038/srep01892.

The vertically oriented anatase single crystalline TiO2 nanostructure arrays (TNAs) consisting of TiO2 truncated octahedrons with exposed {001} facets or hierarchical TiO2 nanotubes (HNTs) consisting of numerous nanocrystals on Ti-foil substrate were synthesized via a two-step hydrothermal growth process. The first step hydrothermal reaction of Ti foil and NaOH leads to the formation of H-titanate nanowire arrays, which is further performed the second step hydrothermal reaction to obtain the oriented anatase single crystalline TiO2 nanostructures such as TiO2 nanoarrays assembly with truncated octahedral TiO2 nanocrystals in the presence of NH4F aqueous or hierarchical TiO2 nanotubes with walls made of nanocrystals in the presence of pure water. Subsequently, these TiO2 nanostructures were utilized to produce dye-sensitized solar cells in a backside illumination pattern, yielding a significant high power conversion efficiency (PCE) of 4.66% (TNAs, J(SC) = 7.46 mA cm(-2), V(OC) = 839 mV, FF = 0.75) and 5.84% (HNTs, J(SC) = 10.02 mA cm(-2), V(OC) = 817 mV, FF = 0.72), respectively.

具有暴露的{001}面的锐钛矿单晶 TiO2 纳米结构阵列（TNAs）和由 Ti 箔基底上的许多纳米晶体组成的分级 TiO2 纳米管（HNTs）是通过两步水热生长工艺合成的。Ti 箔和 NaOH 的第一步水热反应导致 H-钛酸盐纳米线阵列的形成，进一步在第二步水热反应中在 NH4F 水溶液中获得取向锐钛矿单晶 TiO2 纳米结构，如 TiO2 纳米阵列组装有具有截断八面体 TiO2 纳米晶体，或在纯水中获得由纳米晶体组成的分级 TiO2 纳米管。随后，这些 TiO2 纳米结构被用于背面照明图案的染料敏化太阳能电池的制备，分别产生显著的高功率转换效率（PCE）为 4.66%（TNAs，J（SC）=7.46 mA cm(-2)，V（OC）=839 mV，FF=0.75）和 5.84%（HNTs，J（SC）=10.02 mA cm(-2)，V（OC）=817 mV，FF=0.72）。