4.6 Article

Flexible quantum dot-sensitized solar cells with improved efficiencies based on woven titanium wires

Journal

JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 37, Pages 15546-15552

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta03212h

Keywords

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Funding

  1. National Key Basic Research Program of China [2013CB922303, 2010CB833103]
  2. National Natural Science Foundation of China [11274201, 51231007]
  3. 111 Project [B13029]
  4. National Fond for Fostering Talents of Basic Science [J1103212]
  5. Fundamental Research Funds of Shandong University [2014YQ003]

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Uniform zinc oxide (ZnO) nanosheet arrays were grown on woven titanium wires using a low temperature hydrothermal method. Photoanodes were prepared by depositing CdS and CdSe quantum dots onto the ZnO nanosheet arrays by a successive ionic layer adsorption and reaction (SILAR) method. Solar cells were assembled using these nanostructured photoanodes and their photovoltaic performance was characterized. The effect of using SILAR cycles for the deposition of quantum dots on the performance of these nanostructured solar cells was investigated systematically. The overall light-to-electricity conversion efficiency of 0.98% was achieved under 100 mW cm(-2) illumination for flexible CdS/CdSe co-sensitized solar cells using conventional Pt foils as counter electrodes. To further improve the performance of the flexible solar cells, PbS and Cu2S counter electrodes based on Pb and Cu foils were fabricated. The best conversion efficiencies of flexible CdS/CdSe co-sensitized solar cells using Cu2S and PbS counter electrodes were 3.4% and 2.5%, which demonstrated a significant enhancement in values for short circuit current, open circuit voltage, and fill factor compared to those obtained with the commonly used Pt and Au electrodes.

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