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<p>Using Sol–gel method Lanthanum titanate (La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>) nanoparticles was synthesized and its performance as recombination blocking layer in dye-sensitized solar cells (DSSC) was studied. Formation of Monoclinic phase La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> was confirmed from X-ray diffraction (XRD)&#xa0;and Raman analysis respectively. Samples morphology studied through Field Emission Scanning Electron Microscope&#xa0;(FE-SEM) and High-Resolution Transmission Electron Microscopy (HRTEM) revealed the layered structure of the material. The elemental composition of La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> were confirmed by Energy Dispersive X-ray Analysis (EDAX)<sub>,</sub> and the Selected Area Electron Diffraction (SAED) pattern revealed the polycrystalline nature of a material. UV–VIS and photoluminescence spectroscopies were used to study its light absorption and emission properties respectively. Furthermore, the photovoltaic performance of the La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> based blocking layers in DSSCs was evaluated through J-V characterization and its charge kinetics were studied using Electrochemical impedance spectroscopy (EIS) respectively. These findings suggest that La₂Ti₂O₇ has promising capabilities as an effective recombination-blocking layer at the photoanode/electrolyte interface in dye-sensitised solar cells.</p>

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Layered lanthanum titanate (La₂Ti₂O₇) based recombination blocking layers for dye-sensitized solar cells

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • A. Jai Aswin,
  • M. R. Venkatraman,
  • A. Pragatheeswaran,
  • Mohan Raj Subramaniam,
  • P. Balraju,
  • G. Rajesh

摘要

Using Sol–gel method Lanthanum titanate (La2Ti2O7) nanoparticles was synthesized and its performance as recombination blocking layer in dye-sensitized solar cells (DSSC) was studied. Formation of Monoclinic phase La2Ti2O7 was confirmed from X-ray diffraction (XRD) and Raman analysis respectively. Samples morphology studied through Field Emission Scanning Electron Microscope (FE-SEM) and High-Resolution Transmission Electron Microscopy (HRTEM) revealed the layered structure of the material. The elemental composition of La2Ti2O7 were confirmed by Energy Dispersive X-ray Analysis (EDAX), and the Selected Area Electron Diffraction (SAED) pattern revealed the polycrystalline nature of a material. UV–VIS and photoluminescence spectroscopies were used to study its light absorption and emission properties respectively. Furthermore, the photovoltaic performance of the La2Ti2O7 based blocking layers in DSSCs was evaluated through J-V characterization and its charge kinetics were studied using Electrochemical impedance spectroscopy (EIS) respectively. These findings suggest that La₂Ti₂O₇ has promising capabilities as an effective recombination-blocking layer at the photoanode/electrolyte interface in dye-sensitised solar cells.