TiO2-nanotube-based dye-sensitized solar cells containing fluorescent material

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Dye-sensitized solar cells (DSCs) are a promising photovoltaic technology.
• Efficient electron transfer in TiO2 nanotube arrays is crucial for device performance.
• Optimizing light spectrum utilization is key to enhancing power conversion efficiency.

Purpose of the Study:

• To improve the power conversion efficiency of TiO2 nanotube-based DSCs.
• To investigate the effect of incorporating a fluorescent material (F-6377) on DSC performance.
• To analyze electron transfer dynamics and device lifetime.

Main Methods:

• Fabrication of TiO2 nanotube arrays via anodization of Ti foil (15 microm thickness).
• Incorporation of fluorescent material F-6377 to absorb and re-emit light.
• Fabrication of DSCs using N719 dye and a 13(-)/l(-) electrolyte.
• Characterization using electrochemical impedance spectroscopy (EIS).

Main Results:

• The fluorescent material absorbed light at 460 nm, providing additional light for the N719 dye.
• DSCs with fluorescent material exhibited a short-circuit current density (Jsc) of 10.8 mA/cm2.
• The power conversion efficiency reached 2.48% in DSCs incorporating the fluorescent material.

Conclusions:

• Fluorescent material incorporation enhances light spectrum utilization in TiO2 nanotube-based DSCs.
• The addition of F-6377 leads to improved electron generation and power conversion efficiency.
• EIS analysis provides insights into electron transfer mechanisms and device stability.