Improving photoelectrochemical activity of dye sensitized solar cell by a bilayered electrode with an overlayer of mesoporous anatase TiO2--颗粒学报PARTICUOLOGY

Jiang, J., Zhang, J., Gu, F., Shao, W., Li, C., & Lu, M. (2011). Improving photoelectrochemical activity of dye sensitized solar cell by a bilayered electrode with an overlayer of mesoporous anatase TiO2. Particuology, 9(3), 222–227. https://doi.org/10.1016/j.partic.2010.08.013

Improving photoelectrochemical activity of dye sensitized solar cell by a bilayered electrode with an overlayer of mesoporous anatase TiO₂

Jun Jiang ^a, Jian Zhang ^a, Feng Gu ^a *, Wei Shao ^a, Chunzhong Li ^a *, Mengkai Lu ^b

a Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
b State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China

10.1016/j.partic.2010.08.013

Volume 9, Issue 3, June 2011, Pages 222-227

Received 25 June 2010, Revised 14 August 2010, Accepted 25 August 2010, Available online 6 April 2011.

E-mail: czli@ecust.edu.cn; gufeng@ecust.edu.cn

Highlights

Abstract

For better performance of dye sensitized solar cells (DSSCs), a bilayer structured electrode was constructed by employing a mesoporous anatase TiO₂ overlayer above a commercial P25 TiO₂ nanoparticles underlayer. The mesoporous anatase TiO₂, prepared through a facile surfactant-assisted sol–gel process, possessed large pore size and well inter-connected network structure, both beneficial for dye adsorption and electron transfer. The dye adsorption capability of the mesoporous TiO₂ was nearly twice that of the P25 counterpart. In the electrode, the mesoporous TiO₂ film enhanced both dye adsorption and light-harvest, to increase photocurrent (J_sc) from 12.32 to 14.78 mA/cm². Compared to the single P25 TiO₂ film, the synergy of the mesoporous TiO₂ and the P25 TiO₂ nanoparticle films in the electrode resulted in a 24% improvement in light-to-electricity conversion efficiency (η). This bilayered electrode provides an alternative approach for further developing a photovoltaic device with better cell performance.

Graphical abstract

Keywords

Meosporous TiO₂; Preparation; Bilayer structured electrode; Dye sensitized solar cells

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