Addition of TiO2 nanowires in different polymorphs for dye-sensitized solar cells

• Authors: Keisuke Asagoe , Supachai Ngamsinlapasathian , Yoshikazu Suzuki , Susumu Yoshikawa
• Languages of publication: EN

Abstracts

EN

TiO2 (B) and TiO2 anatase nanowires were prepared at 150 °C for 120 h by a hydrothermal method followed by calcination in air at 400 °C for 2 h and at 700 °C for 2 h for TiO2 (B) and TiO2 anatase, respectively. Although dye-sensitized solar cells (DSC) with fully nanowire electrodes showed a rather low light-to-electricity conversion efficiency of 1.33 % for TiO2 (B) and 2.42% for TiO2 anatase, 10 wt % nanowire-dispersed electrodes in a P-25 TiO2-nanoparticle matrix demonstrated improved efficiency of 6.17 % for TiO2 (B) and 6.53% for TiO2 anatase, these exceeding that of pure P-25 electrodes in this work (η=5.59%). The dominant mechanisms of the improvement at 10 wt% for the two different polymorphs are thought to be different, i.e., a light-scattering and film-thickness increment for the TiO2 (B) system, whereas there is an improved conduction path through the matrix for the TiO2 anatase system. [...]

Keywords

EN

Hydrothermal method; TiO2 nanowire; partially nanowire-structured electrode; dye-sensitized solar cell

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2007
• Volume: 5
• Issue: 2
• Pages: 605-619

Dates

published

1 - 6 - 2007

online

20 - 1 - 2007

Contributors

author

Keisuke Asagoe

• Institute of Advanced Energy, Kyoto University, Uji, Kyoto, 611-0011, Japan

author

Supachai Ngamsinlapasathian

• Institute of Advanced Energy, Kyoto University, Uji, Kyoto, 611-0011, Japan

author

Yoshikazu Suzuki

• Institute of Advanced Energy, Kyoto University, Uji, Kyoto, 611-0011, Japan

author

Susumu Yoshikawa

• Institute of Advanced Energy, Kyoto University, Uji, Kyoto, 611-0011, Japan

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Identifiers

DOI

10.2478/s11532-007-0001-4