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.
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Chahid, S., de los Santos, D.M., Alcántara, R. (2019). Dye-Sensitized Cu-Doped TiO2 Solar Cells with a Double Flat Band. In: Ben Ahmed, M., Boudhir, A., Younes, A. (eds) Innovations in Smart Cities Applications Edition 2. SCA 2018. Lecture Notes in Intelligent Transportation and Infrastructure. Springer, Cham. https://doi.org/10.1007/978-3-030-11196-0_76
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