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Enhanced performances of dye-sensitized solar cells based on graphite–TiO2 composites

✍ Scribed by Xi Hu; Kelong Huang; Dong Fang; Suqin Liu

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
670 KB
Volume
176
Category
Article
ISSN
0921-5107

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✦ Synopsis

The graphite-incorporated TiO 2 composites for the photoanodes of the Dye-sensitized solar cells were prepared by ultrasound-assisted mixing method. The performances of these solar cells with different graphite additions were investigated by the photocurrent-voltage characteristics, open-circuit voltage decay measurement and electrochemical impedance spectroscopy. The results showed that the addition of graphite had a significant impact on the electron transport and recombination. The photocurrentvoltage results indicated that short-circuit current density (J sc ) and open-circuit voltage (V oc ) enhanced by 40% and 2%, respectively. A 30% improvement in conversion efficiency of dye-sensitized solar cell from 4.44% to 5.76% was achieved using 0.01 wt% graphite-TiO 2 composite electrodes compared to the pure TiO 2 electrode.

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