Journal
APPLIED SCIENCES-BASEL
Volume 12, Issue 18, Pages -Publisher
MDPI
DOI: 10.3390/app12189280
Keywords
photoanode; dye-sensitized solar cell; nanoparticles; microwave synthesis
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Funding
- Najran University [NU/IFC/INT/01/003]
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Pure TiO2 and barium doped TiO2 (Ba/TiO2) nanostructures were synthesized using a facile microwave irradiation method. The addition of barium influenced the optical properties and morphology of the material, resulting in higher conversion efficiency in a dye-sensitized solar cell.
Pure TiO2 and barium (0.5 wt%) doped TiO2 (Ba/TiO2) nanostructures have been synthesized via facile microwave irradiation method. The pure anatase phase of synthesized photoactive material was confirmed by X-ray diffraction. Ba doping in the TiO2 host structure influenced the optical band gap as confirmed by UV-visible spectroscopy. The optical band gap increased from 3.21 eV for the TiO2 to 3.26 eV for Ba/TiO2. Morphological analysis of synthesized TiO2 and Ba/TiO2 was conducted using scanning electron microscopy. Energy dispersive X-ray spectroscopy confirmed the formation of Ba/TiO2 and no impurities were observed. Electrochemical impedance spectroscopy showed that the charge transfer resistance increased for Ba/TiO2, which reduced dark current creation in a dye-sensitized solar cell. The highest power conversion efficiency (3.24%) was achieved for Ba/TiO2 photoanode compared to 2.1% for a pure TiO2 photoanode-based device.
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