Structural Refinement and Optoelectrical Properties of Nd₂Ru₂O₇ and Gd₂Ru₂O₇ Pyrochlore Oxides for Photovoltaic...

Area of Science:

• Materials Science
• Solid-State Chemistry
• Photovoltaics

Background:

• High-performance photovoltaic devices depend on advanced photoanode materials.
• Optimizing optoelectric properties is crucial for improving solar cell efficiency.

Purpose of the Study:

• To synthesize and characterize neodymium ruthenate (Nd2Ru2O7) and gadolinium ruthenate (Gd2Ru2O7) pyrochlore oxides.
• To evaluate their potential as photoanode absorbers in dye-sensitized solar cells.

Main Methods:

• Solid-state reaction technique for material synthesis.
• X-ray diffraction and Raman spectroscopy for structural and phase analysis.
• Scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX) for morphology and composition.
• Current-voltage (I-V) measurements for electrical characterization.

Main Results:

• Cubic (Fd-3m) and residual orthorhombic (Pnma) phases were identified in both NRO and GRO.
• SEM/EDX confirmed material composition and morphology with grain sizes of ~1 µm (NRO) and ~0.5 µm (GRO).
• Both materials demonstrated n-type semiconductor behavior with conductivities of 4.5 Ohm·cm⁻¹ (NRO) and 1.5 Ohm·cm⁻¹ (GRO).

Conclusions:

• NRO and GRO exhibit promising optoelectric properties for photovoltaic applications.
• These pyrochlore oxides are suitable candidates for photoanode absorbers in dye-sensitized solar cells.
• The synthesized materials offer potential for enhancing solar panel efficiency.