Design of dye-sensitized solar cells using TiO2 pastes with different secondary particles sizes

Shiro Iwata; Seitaro Fukunaga; Naoto Imawaka; Katsumi Yoshino

doi:10.1117/1.JPE.8.032210

3 May 2018 Design of dye-sensitized solar cells using TiO2 pastes with different secondary particles sizes

Shiro Iwata, Seitaro Fukunaga, Naoto Imawaka, Katsumi Yoshino

Author Affiliations +

Journal of Photonics for Energy, Vol. 8, Issue 3, 032210 (May 2018). https://doi.org/10.1117/1.JPE.8.032210

Abstract

Titanium dioxide (TiO₂) pastes containing secondary particle with varying sizes are prepared by modulating the dispersion time of the dispersion liquid. The appearances, mesoscopic structures, and transmission spectra of the TiO₂ layers constructed using these pastes depend on the sizes of the secondary particles. However, the dye-sensitized solar cells (DSSCs) constructed using different pastes show similar photoelectric conversion performances despite the different mesoscopic structures and transmission properties of the TiO₂ layers. The DSSCs based on the experimental TiO₂ pastes show lower photoelectric conversion efficiencies compared with the DSSC constructed using a commercially available reference paste. These results suggest that the primary TiO₂ particles have a greater influence on the photoelectric conversion performance of the DSSC than the secondary particles. The incident photon-to-current conversion efficiency spectra of the DSSCs based on the TiO₂ pastes exhibit a slight dependence on wavelength. Thus, it is possible that minor light-scattering effects resulting from the mesoscopic structure of TiO₂ occur in the DSSCs constructed using the pastes. These results indicate that TiO₂ pastes with fixed primary particle sizes but different secondary particle sizes can be used to change the appearance or design of DSSCs without affecting their photoelectric conversion performance.

Citation Download Citation

Shiro Iwata, Seitaro Fukunaga, Naoto Imawaka, and Katsumi Yoshino "Design of dye-sensitized solar cells using TiO2 pastes with different secondary particles sizes," Journal of Photonics for Energy 8(3), 032210 (3 May 2018). https://doi.org/10.1117/1.JPE.8.032210

Received: 25 December 2017; Accepted: 9 April 2018; Published: 3 May 2018

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