Solid-State Solar Energy Conversion from WO₃ Nano and Microstructures with Charge Transportation and Light-Scattering...

Area of Science:

• Materials Science
• Renewable Energy Technologies

Background:

• Solar energy conversion devices require efficient electrolytes for optimal performance.
• Tungsten oxide (WO3) nanostructures are explored for their potential in enhancing solar cell efficiency.

Purpose of the Study:

• To synthesize and characterize disk-WO3 (D-WO3) and plate-WO3 (P-WO3) nanostructures.
• To evaluate the performance of D-WO3 and P-WO3 as solid-state electrolytes in solar energy conversion devices.

Main Methods:

• Hydrothermal synthesis was employed to prepare D-WO3 and P-WO3 nanostructures.
• Structural and morphological analyses were conducted.
• Solar energy conversion devices were fabricated using gel and solid-state electrolytes.
• Electrochemical impedance spectroscopy (EIS), intensity-modulated voltage spectroscopy (IMVS), diffuse reflectance, and incident photon-to-current conversion efficiency (IPCE) were utilized for performance evaluation.

Main Results:

• P-WO3 solid-state electrolytes demonstrated superior performance compared to gel electrolytes and D-WO3 solid-state electrolytes.
• The P-WO3 solid-state electrolyte achieved a power conversion efficiency of 6.3%, outperforming the gel electrolyte (4.2%) and D-WO3 solid-state electrolyte (5.5%).
• Enhanced charge transportation and light-scattering properties of P-WO3 contributed to the improved cell performance.

Conclusions:

• P-WO3 solid-state electrolytes offer significant advantages for solar energy conversion devices.
• The unique microstructures of P-WO3 facilitate improved charge transport and light management, leading to higher power conversion efficiencies.