Dye-sensitized solar cells based on TiO2-B nanobelt/TiO2 nanoparticle sandwich-type photoelectrodes with controllable nanobelt length

被引：20

作者：

Dong, Youzhen ^{[1
]}

Pan, Kai ^{[1
]}

Tian, Guohui ^{[1
]}

Zhou, Wei ^{[1
]}

Pan, Qingjiang ^{[1
]}

Xie, Tengfeng ^{[2
]}

Wang, Dejun ^{[2
]}

Fu, Honggang ^{[1
]}

机构：

[1] Heilongjiang Univ, Sch Chem & Mat Sci, Key Lab Funct Inorgan Mat Chem, Minist Educ, Harbin 150080, Peoples R China

[2] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China

来源：

DALTON TRANSACTIONS | 2011年 / 40卷 / 15期

基金：

中国国家自然科学基金;

关键词：

SOLID-STATE; NANOCRYSTALLINE TIO2; IMPEDANCE SPECTROSCOPY; ELECTRON-TRANSPORT; TITANIUM-DIOXIDE; EFFICIENT; NANORODS; FILMS; PERFORMANCE; COMPOSITES;

D O I：

10.1039/c0dt01799j

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The TiO2-B nanobelt (NB)/TiO2 nanoparticle (NP) sandwich-type structure photoelectrode, with controllable nanobelt length, has been used to fabricate high-efficiency dye-sensitized solar cells (DSSCs), which combine the advantages of the rapid electron transport in TiO2-B NBs and the high surface area of TiO2 NPs. The results indicate that the sandwich-type photoelectrode achieves higher photoelectrical conversion efficiency when compared with the TiO2 nanoparticulate electrode. Increasing the length of TiO2-B NBs has been demonstrated to improve the photoelectric conversion efficiency (eta). DSSCs with the longest (10 mu m) TiO2-B NBs yield the highest eta of 7.94%. The interfacial electron transport of DSSCs with different lengths of TiO2-B NBs has been quantitatively investigated using the photovoltage transient and the electrochemical impedance spectra, which demonstrates that the DSSCs with longest TiO2-B NBs display the highest electron collection efficiency and the fastest interfacial electron transfer.

引用

页码：3808 / 3814

页数：7

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