DSSC photoanodes fabricated with mesoporous TiO2 hollow spheres

Chang Yu Liao, H. Paul Wang, Hong Ping Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To enhance solar energy efficiency of a dye-sensitized solar cell (DSSC), high crystallinity mesoporous TiO2 hollow spheres (MHS-TiO 2) have been coated on the DSSC photoanode. The MHS-TiO2 was prepared by calcination of the Ti(OBu)4 coated mesoporous carbon hollow spheres at temperature of 873 K. Observations by XRD, FE-SEM, TEM, and HR-TEM suggest that the MHS-TiO2 is composed of mainly fine anatase nano structures. The specific absorption edge and band gap of the MHS-TiO 2 determined by diffuse reflectance ultraviolet-visible spectroscopy are 200-400 run and 3.44 eV, respectively. By X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), it is found that the MHS-TiO2 possesses Ti-0 and Ti-(0)-Ti bond distances of 1.98 and 3.07 å with coordination numbers of 2.9 and 0.7, respectively. The current-voltage (I-V) curves of the DSSC utilizing the MHS-TiO2 photoanodes were determined with an AM 1.5G solar simulator. Notably, the photovoltaic performances of the DSSC are 0.714 V in the open-circuit voltage, 2.52 mA-cm-2 in the short-circuit current density, and 0.666 in the fill factor, and a better conversion efficiency (1.2%) is obtained.

Original languageEnglish
Title of host publicationNanotechnology 2010
Subtitle of host publicationAdvanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
Pages635-638
Number of pages4
Publication statusPublished - 2010 Nov 9
EventNanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010 - Anaheim, CA, United States
Duration: 2010 Jun 212010 Jun 24

Publication series

NameNanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
Volume1

Other

OtherNanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010
CountryUnited States
CityAnaheim, CA
Period10-06-2110-06-24

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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  • Cite this

    Liao, C. Y., Wang, H. P., & Lin, H. P. (2010). DSSC photoanodes fabricated with mesoporous TiO2 hollow spheres. In Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010 (pp. 635-638). (Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites - Technical Proceedings of the 2010 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2010; Vol. 1).