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Energies 2016, 9(8), 641; doi:10.3390/en9080641

Effect of Photoanode Design on the Photoelectrochemical Performance of Dye-Sensitized Solar Cells Based on SnO2 Nanocomposite

Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Issouf Fofana
Received: 2 June 2016 / Revised: 1 August 2016 / Accepted: 8 August 2016 / Published: 13 August 2016
(This article belongs to the Special Issue Dye Sensitized Solar Cells)
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Abstract

Li-doped ZnO (LZO) aggregated nanoparticles are used as an insulating layer in SnO2 nanocomposite (SNC) photoanodes to suppress the recombination process in dye-sensitized solar cells (DSSCs). Various weight percentages of SnO2 nanoparticles (SNPs) and SnO2 nanoflowers (SNFs) were used to prepare SNC photoanodes. The photocurrent-voltage characteristics showed that the incorporation of an LZO insulating layer in an SNC photoanode increased the conversion efficiency of DSSCs. This was due to an increase in the surface area, charge injection, and charge collection, and the minimization of the recombination rate of photoanodes. Electrochemical impedance spectroscopy (EIS) results showed lower series resistance, charge injection resistance, and shorter lifetimes for DSSCs based on an SNC photoanode with an LZO insulating layer. The open circuit voltage and fill factor of the DSSCs based on SNC photoanodes with an LZO insulating layer significantly increased. The DSSC based on a SNC photoanode with a SNC:SNF weight ratio of 1:1 had a high current density of 4.73 mA/cm2, open circuit voltage of 630 mV, fill factor of 69%, and efficiency of 2.06%. View Full-Text
Keywords: photoanode; nanoparticle; nanoflower; nanocomposite; dye-sensitized solar cells (DSSCs) photoanode; nanoparticle; nanoflower; nanocomposite; dye-sensitized solar cells (DSSCs)
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Hung, I.-M.; Bhattacharjee, R. Effect of Photoanode Design on the Photoelectrochemical Performance of Dye-Sensitized Solar Cells Based on SnO2 Nanocomposite. Energies 2016, 9, 641.

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