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Open Access Nano Review

Increases in solar conversion efficiencies of the ZrO2 nanofiber-doped TiO2 photoelectrode for dye-sensitized solar cells

Jiao Wang1, En Mei Jin1, Ju-Young Park2, Wan Lin Wang1, Xing Guan Zhao1 and Hal-Bon Gu1*

Author Affiliations

1 Department of Electrical Engineering, Chonnam National University, Gwangju, 500-757, South Korea

2 Southwestern Research Institute of Green Energy Technology, Mokpo-si, Jeonllanam-do, 530-400, South Korea

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Nanoscale Research Letters 2012, 7:98  doi:10.1186/1556-276X-7-98

Published: 2 February 2012

Abstract

In this paper, in order to improve the efficiency of dye-sensitized solar cells, we introduced zirconia [ZrO2] nanofibers into a mesoporous titania [TiO2] photoelectrode. The photoelectrode consists of a few weight percent of ZrO2 nanofibers and a mesoporous TiO2 powder. The mixed ZrO2 nanofibers and the mesoporous TiO2 powder possessed a larger surface area than the corresponding mesoporous TiO2 powder. The optimum ratio of the ZrO2 nanofiber was 5 wt.%. The 5 wt.% ZrO2-mixed device could get a short-circuit photocurrent density of 15.9 mA/cm2, an open-circuit photovoltage of 0.69 V, a fill factor of 0.60, and a light-to-electricity conversion efficiency of 6.5% under irradiation of AM 1.5 (100 mW/cm2).

Keywords:
zirconia nanofiber; titania; DSSC