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Zno Nanorods/Nanoparticles: Novel Hydrothermal Synthesis, Characterization and Formation Mechanism for Increasing the Efficiency of Dye-Sensitized Solar Cells

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Abstract

Zinc oxide (ZnO) nanorods were successfully synthesized via a novel hydrothermal route using new set of starting reagents including Zn(OAc)2·2H2O, ethylenediamine and hydrazine. The as-synthesized products were characterized by techniques including X-ray diffraction, energy dispersive spectrometry, Scanning electron microscopy, fourier transform infrared spectra and diffused reflectance UV–Vis spectrum and a possible growth mechanism of the ZnO nanorods was proposed. As-obtained products were utilized as photo-anode electrode in dye-sensitized solar cells and ZnO nanostructures were deposited on FTO via electrophoresis-based method. Moreover, effect of ethylenediamine and hydrazine on morphology and consequently, on solar cells efficiency was evaluated. The results showed that particle size and morphology have salient effect on solar cells efficiency and rod-like nanostructures of ZnO with smaller length and diameter have higher efficiency compared to spherical ZnO nanostructures. In addition, depositing of ZnO nanorods on ZnO nanoparticles led to obtaining 3.85 % cell efficiency that in comparison with sole nanorods (2.81 %) and sole nanoparticles (2.07 %), efficiency improvements of 37 and 86 % were respectively achieved.

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Acknowledgments

This work was supported by the Chemistry Research Center at Islamic Azad University, Arak.

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Authors and Affiliations

  1. Young Researchers and Elites Club, Arak Branch, Islamic Azad University, Arak, Iran

    Zabihullah Zarghami

  2. Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran

    Majid Ramezani

  3. Applied Chemistry Department, South Tehran Branch, Islamic Azad University, Tehran, Iran

    Kourosh Motevalli

Authors
  1. Zabihullah Zarghami
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  2. Majid Ramezani
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  3. Kourosh Motevalli
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Correspondence to Zabihullah Zarghami.

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Zarghami, Z., Ramezani, M. & Motevalli, K. Zno Nanorods/Nanoparticles: Novel Hydrothermal Synthesis, Characterization and Formation Mechanism for Increasing the Efficiency of Dye-Sensitized Solar Cells. J Clust Sci 27, 1451–1462 (2016). https://doi.org/10.1007/s10876-016-1011-1

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  • DOI: https://doi.org/10.1007/s10876-016-1011-1

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