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.

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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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