Titania Nanoparticle Film Prepared by Electrophoretic Deposition under DC Constant-Current Condition


Article Preview

Electrophoretic deposition (EPD) is one of useful methods for the preparation of the thin film with homogeneous microstructure on a conductive substrate. In the EPD method, the structure of the particle thin film could be controlled by adjusting the electrical operating conditions. Titania nanoparticle (NP) films, which are used for the electrode of dye-sensitized solar cells (DSSCs), require not only the homogeneous microstructure but also controlled pore size distribution, contributing to high-rate transport of electrons for the high conversion efficiency of DSSCs. In this study, titania NP films were prepared by EPD under DC constant-current conditions using available NPs dispersed in ethanol. The thickness as well as the weight of the titania NP film appeared to be increased almost linearly with EPD operation time, while the porosity of the film calculated from those values was not always constant but increased slightly with the operation time and asymptotically reached about 60%. We confirmed that the forces on the particles depositing onto the substrate became weaker as the EPD operation time increased, due to the electrostatic charges gradually building up on the thin NP film with particle deposition. The deposition behavior of titania NPs was drastically changed upon varying the water content in ethanol. We detected many pinholes on the surface of thin NP films when the water content in ethanol increased. The amount of particles accumulated on the substrate via EPD could be calculated based on the electrical conductivity of the suspension and the mobility of particles in the suspension, but was found to be underestimated when the water content increased.



Edited by:

A.R. Boccaccini, J.H. Dickerson, B. Ferrari, O. Van der Biest and T. Uchikoshi




Y. Mori et al., "Titania Nanoparticle Film Prepared by Electrophoretic Deposition under DC Constant-Current Condition", Key Engineering Materials, Vol. 654, pp. 208-212, 2015

Online since:

July 2015




* - Corresponding Author

[1] A.R. Boccaccini, J.A. Roether, B.J.C. Thomas, M.S.P. Shaffer, E. Chavez, E. Stoll, E. Jane Minay, The electrophoretic deposition of inorganic nanoscaled materials, Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, 114 (2006).

DOI: https://doi.org/10.2109/jcersj.114.1

[2] T. Miyasaka, Y. Kijitori, Low-temperature fabrication of dye-sensitized plastic electrodes by electrophoretic preparation of mesoporous TiO2 layers, Journal of the Electrochemical Society, 151 (2004) A1767-A1773.

DOI: https://doi.org/10.1149/1.1796931

[3] Z. Xue, C. Jiang, L. Wang, W. Liu, B. Liu, Fabrication of flexible plastic solid-state dye-sensitized solar cells using low temperature techniques, Journal of Physical Chemistry C, 118 (2014) 16352-16357.

DOI: https://doi.org/10.1021/jp408663d

[4] L. Grinis, S. Dor, A. Ofir, A. Zaban, Electrophoretic deposition and compression of titania nanoparticle films for dye-sensitized solar cells, Journal of Photochemistry and Photobiology A: Chemistry, 198 (2008) 52-59.

DOI: https://doi.org/10.1016/j.jphotochem.2008.02.015

[5] R. Kawakami, K. Ito, Y. Sato, Y. Mori, M. Adachi, S. Yoshikado, Evaluation of TiO2 nanoparticle thin films prepared by electrophoresis deposition, Key Engineering Materials, 485 (2011) 165-168.

DOI: https://doi.org/10.4028/www.scientific.net/kem.485.165

[6] A.K. Atmuri, S.R. Bhatia, A.F. Routh, Autostratification in drying colloidal dispersions: effect of particle interactions, Langmuir : the ACS journal of surfaces and colloids, 28 (2012) 2652-2658.

DOI: https://doi.org/10.1021/la2039762

[7] G. Wang, P. Sarkar, P.S. Nicholson, Surface chemistry and rheology of electrostatically (ionically) stabilized alumina suspensions in polar organic media, Journal of the American Ceramic Society, 82 (1999) 849-856.

DOI: https://doi.org/10.1111/j.1151-2916.1999.tb01845.x

[8] L. Besra, M. Liu, A review on fundamentals and applications of electrophoretic deposition (EPD), Progress in Materials Science, 52 (2007) 1-61.

DOI: https://doi.org/10.1016/j.pmatsci.2006.07.001