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Dye-Sensitized Cu-Doped TiO2 Solar Cells with a Double Flat Band

  • Sara ChahidEmail author
  • Desireé M. de los Santos
  • Rodrigo Alcántara
Conference paper
Part of the Lecture Notes in Intelligent Transportation and Infrastructure book series (LNITI)

Abstract

This study reported the successful synthesis of TiO2 nanoparticles doped with Cu as photoanaodes in dye-sensitized solar cells (DSSCs). The nanoparticles were synthetized by low temperature hydrolysis and annealed at 500 °C. The obtained samples were characterized using, X-ray diffraction XRD, Raman spectroscopy. UV-Vis spectroscopy was used to determine the band gap energy values of the as-prepared samples, which Cu-doped TiO2 nanoparticles showed dramatically decrease in band gap energy from 2.9 eV for undoped TiO2 to 1.35 eV in Cu-doped TiO2 nanoparticles. Significant improvement in photovoltaic devices leads to an increase in short circuit current density (Jsc) and in the efficiency of the cell made with Cu-TiO2 increased. This improvement can be explained by the flat band values; which the sample with Cu presented two flat band voltage values, that indicated the creation of the new sublevels in the valance band maximum with a narrowing in the band gap of TiO2 nanoparticles.

Keywords

Cu-doped TiO2 DSSCs Flat band voltage 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Sara Chahid
    • 1
    Email author
  • Desireé M. de los Santos
    • 1
  • Rodrigo Alcántara
    • 1
  1. 1.Departamento de Química Física, Facultad de CienciasUniversidad de CádizPuerto Real (Cádiz)Spain

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