Rostock 2019 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 24: Large and Reactive Systems

MO 24.1: Vortrag

Freitag, 15. März 2019, 10:30–10:45, S HS 002 Biologie

Effectiveness of Dye Siensitized Solar Cells (DSSCs) based on Cu-doped TiO₂ photoanodes. — •Sara Chahid — SCEM research group, Department of Physical Chemistry, Faculty of Sciences, University of Cádiz, 11510, Puerto Real (Cádiz), Spain.

In this research, Cu-doped TiO₂ nanostructures with different doping contents from 0 to 10.0% (mole fraction) were synthesized through hydrolysis at low temperature. The as-prepared Cu-doped TiO₂ nanostructures was characterized with several techniques, X-ray diffraction (XRD) and Raman spectroscopy were used to study the morphology and structure of the nanoparticles, which confirmed the crystalline anatase tetragonal structure. The UV-Vis Spectroscopy analysis was found that incorporation of Cu²⁺ into titanium affects the band gap of TiO₂ and extending his activity towards visible sunlight region. Scanning Electron Microscopic (SEM) analysis confirming the Cu content is incorporated into TiO₂ lattice affecting efficiency of doped samples. Further, the active specific surface area of the system was investigated employing Brunauer-Emmet-Teller (BET) measurement. Then the Dye-sensitized solar cells (DSSCs) based on Cu-doped TiO₂ photoanaodes were fabricated and investigated with chemically absorbed Ruthenium N3 dye electrode under light illumination with standard solar simulator (AM 1.5G, 100mW/cm²). Results demonstrated that the 1.0% Cu-doped TiO₂ sample annealed at 773K for 60 minutes exhibited the best photovoltaic performance of open circuit voltage (Voc = 957.5 mV), short circuit current density (Jsc = 0.795 mAcm⁻²), and the cell efficiency was reached (η = 4.524%), which consists 50% higher than the un-doped cell. This study may open up more investigated works applying Cu doped TiO₂ in photovoltaic fields.