Influence of Annealing Ambient on the Photoelectric and Photoelectrochemical Properties of TiO2 Nanorod Arrays

Influence of Annealing Ambient on the Photoelectric and Photoelectrochemical Properties of TiO2... Ordered TiO2 nanorod arrays (NRAs) have been synthesized on transparent conducting F-doped SnO2 (FTO) substrates via a facile hydrothermal method for dye-sensitized solar cells (DSSCs). Annealing in air at 500°C resulted in a large enhancement of DSSC performance, while the performance was much decreased after annealing in the reducing ambient (Ar or vacuum). This was ascribed to a lowering of the interfacial charge separation or injection. Moreover, it was also found that the photoelectrochemical activity of TiO2 NRA was enhanced after annealing in Ar or vacuum, which was totally opposite to the variation of DSSC performance, and was ascribed to the enhancements of both interface charge transfer and visible-light absorption (as had been confirmed by the color change). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Electronic Materials Springer Journals

Influence of Annealing Ambient on the Photoelectric and Photoelectrochemical Properties of TiO2 Nanorod Arrays

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Publisher
Springer US
Copyright
Copyright © 2018 by The Minerals, Metals & Materials Society
Subject
Materials Science; Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics
ISSN
0361-5235
eISSN
1543-186X
D.O.I.
10.1007/s11664-018-6397-0
Publisher site
See Article on Publisher Site

Abstract

Ordered TiO2 nanorod arrays (NRAs) have been synthesized on transparent conducting F-doped SnO2 (FTO) substrates via a facile hydrothermal method for dye-sensitized solar cells (DSSCs). Annealing in air at 500°C resulted in a large enhancement of DSSC performance, while the performance was much decreased after annealing in the reducing ambient (Ar or vacuum). This was ascribed to a lowering of the interfacial charge separation or injection. Moreover, it was also found that the photoelectrochemical activity of TiO2 NRA was enhanced after annealing in Ar or vacuum, which was totally opposite to the variation of DSSC performance, and was ascribed to the enhancements of both interface charge transfer and visible-light absorption (as had been confirmed by the color change).

Journal

Journal of Electronic MaterialsSpringer Journals

Published: May 31, 2018

References

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