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

作者：Dong Youzhen; Pan Kai; Tian Guohui; Zhou Wei; Pan Qingjiang; Xie Tengfeng; Wang Dejun; Fu Honggang^*

来源：Dalton Transactions, 2011, 40(15): 3808-3814.

DOI：10.1039/c0dt01799j

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.

• 出版日期2011
• 单位黑龙江大学; 吉林大学