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Zeng T.,Jingde Zhen Ceramic Institute | Chen Y.,Jingde Zhen Ceramic Institute | Su X.,Jingde Zhen Ceramic Institute | Li Y.,Jingde Zhen Ceramic Institute | Feng Q.,Jingde Zhen Ceramic Institute
Materials Letters | Year: 2014

Well-crystalline TiO2 nanoparticles (NPs) with narrow size distribution have been prepared by simple hydrothermal steam induced crystallization method (HSICM). XRD analysis revealed that the sample exhibited pure anatase phase with tetragonal structure, which was also confirmed by the information obtained from HRTEM analysis. The N2 adsorption- desorption isotherm and XPS analysis demonstrated the existence of nanoporosity and oxygen vacancies within the sample, and its surface area could reach as high as 121.50 m2/g. The following J-V, IPCE, EIS solar cell measurement results indicated that the sample used as photoanode materials in dye-sensitized solar cells showed greater photovoltaic response than commercial TiO 2 P25. © 2014 Elsevier B.V.


Zeng T.,Jingde Zhen Ceramic Institute | Ni H.,Jingde Zhen Ceramic Institute | Su X.,Jingde Zhen Ceramic Institute | Chen Y.,Jingde Zhen Ceramic Institute | Jiang Y.,Jingde Zhen Ceramic Institute
Journal of Power Sources | Year: 2015

Highly crystalline TiO2 nanotube arrays (TNTAs) film is easily realized by treating its amorphous film under the hydrothermal vapor (HV) environment. The freestanding TNTAs film can be lift-off from the Ti foil, which serves as photoanode based on FTO substrate after the transplanting procedure. Compared to the thermal annealing (TA) treated TNTAs photoanode, the HV treated photoanode possesses some excellent properties, such as long optical path, fast charge transporting and easy adsorption of the sensitizer molecules, which can result in high short current density. Notably, the N719 dye sensitized HV treated photoanode prepared under 180 C shows relatively high photovoltaic response in the visible range due to its hierarchical structure, which gives an impressive performance conversion efficiency of 8.11% without any surface modification. And the present work sheds light on the application of the mild crystalline strategy for performance improvement of the DSSCs based on TiO2 nanotube arrays photoanode. © 2015 Elsevier B.V. All rights reserved.

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