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Enhancement of the photoelectric performance of dye-sensitized solar cells using Ag-doped TiO2 nanofibers in a TiO2 film as electrode

En Mei Jin1*, Xing Guan Zhao1, Ju-Young Park2 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, Jeollanam-do, 530-400, South Korea

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Nanoscale Research Letters 2012, 7:97  doi:10.1186/1556-276X-7-97

Published: 2 February 2012

Abstract

For high solar conversion efficiency of dye-sensitized solar cells [DSSCs], TiO2 nanofiber [TN] and Ag-doped TiO2 nanofiber [ATN] have been extended to be included in TiO2 films to increase the amount of dye loading for a higher short-circuit current. The ATN was used on affected DSSCs to increase the open circuit voltage. This process had enhanced the exit in dye molecules which were rapidly split into electrons, and the DSSCs with ATN stop the recombination of the electronic process. The conversion efficiency of TiO2 photoelectrode-based DSSCs was 4.74%; it was increased to 6.13% after adding 5 wt.% ATN into TiO2 films. The electron lifetime of DSSCs with ATN increased from 0.29 to 0.34 s and that electron recombination was reduced.

Keywords:
dye-sensitized solar cell; TiO2; nanofiber; doping; solar conversion efficiency