Issue 3, 2004
From the journal:

Journal of Materials Chemistry

Fabrication and characterization of mesoporous SnO2/ZnO-composite electrodes for efficient dye solar cells

Seigo Ito,a   Yuki Makari,b   Takayuki Kitamura,b   Yuji Wadab  and  Shozo Yanagida*b  

* Corresponding authors

a Venture Business Laboratory, Osaka Univ., Suita, Osaka, Japan

b Material and Life Science Engineering Department, Graduate School of Engineering, Saka University, Suita, Osaka, Japan
E-mail: yanagida@chem.eng.osaka-u.ac.jp
Fax: +81-6-6879-7875
Tel: +81-6-6879-7924

Abstract

Highly efficient mesoporous-composite electrodes were made by a doctor-blade technique from nano-sized SnO2 and submicron-sized ZnO. Coating pastes were prepared by mixing colloidal SnO2 or powdered SnO2 nanoparticles with ZnO submicron particles in the presence of acetic acid, acetylacetone, Triton X-100, and a cellulose thickener. The thickness of SnO2/ZnO-composite electrodes was controlled from 2.6 to 22 µm. The paste using colloidal SnO2 nanoparticles gave SnO2-covered ZnO submicron-sized particles, leading to a high conversion efficiency of the dye-sensitized solar cells (DSCs) at a thickness of 8.8 µm (Voc = 721 mV, Jsc = 12.41 mA cm−2, FF = 0.709 and η = 6.34%). On the other hand, the use of powdered SnO2 nanoparticles resulted in the formation of mixed large aggregates which were isolated from each other, giving low conversion-efficiency solar cells. The existence of a thin Zn2+ layer on the SnO2 layer of the composite electrode is proposed to explain the improvement in the DSC parameters.

Graphical abstract: Fabrication and characterization of mesoporous SnO2/ZnO-composite electrodes for efficient dye solar cells

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Article information

DOI
https://doi.org/10.1039/B311090G
Article type
Paper
Submitted
11 Sep 2003
Accepted
03 Dec 2003
First published
07 Jan 2004

J. Mater. Chem., 2004,14, 385-390

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Fabrication and characterization of mesoporous SnO2/ZnO-composite electrodes for efficient dye solar cells

S. Ito, Y. Makari, T. Kitamura, Y. Wada and S. Yanagida, J. Mater. Chem., 2004, 14, 385 DOI: 10.1039/B311090G

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