Effect of Photoanode Modification with Rare-Earth Metal Oxides on DSSC Performance

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Modifying dye-sensitized solar cell (DSSC) photoanodes with new materials is crucial for enhancing electrochemical device performance.
• Rare-earth oxides (RE2O3) are potential candidates for improving photoanode properties due to their unique characteristics.

Purpose of the Study:

• To investigate the impact of incorporating various rare-earth oxide nanoparticles into TiO2 photoanodes for DSSCs.
• To explore the effect of different rare-earth oxide contents on photoanode structure, morphology, and photovoltaic performance.

Main Methods:

• Fabrication of composite photoanodes by directly mixing selected rare-earth oxide (RE2O3) nanoparticles (Er2O3, Ho2O3, Nd2O3, Yb2O3) with TiO2 paste.
• Characterization of the composite photoanodes using X-ray Diffraction (XRD) for phase analysis and Field Emission Scanning Electron Microscopy (FE-SEM) with Energy Dispersive Spectroscopy (EDS) mapping for morphology and elemental distribution.
• Analysis of photovoltaic parameters of the modified DSSCs through current-voltage (I-V) measurements.

Main Results:

• XRD confirmed the anatase polymorph of TiO2 in the prepared photoanodes.
• FE-SEM and EDS mapping demonstrated uniform morphology and validated the distribution and content of the incorporated RE2O3 nanoparticles.
• Photovoltaic parameters of the modified DSSCs were successfully analyzed, indicating the influence of RE2O3 addition.

Conclusions:

• The direct mixing method is effective for preparing RE2O3-TiO2 composite photoanodes.
• Rare-earth oxides can be uniformly distributed within the TiO2 matrix, influencing photoanode properties.
• The study provides insights into optimizing DSSC performance through rare-earth oxide modification.