Organic dyes based on selenophene for efficient dye-sensitized solar cell

Area of Science:

• Materials Science
• Photovoltaics
• Computational Chemistry

Background:

• Dye-sensitized solar cells (DSSCs) are promising photovoltaic devices.
• Optimizing donor-acceptor (D-π-A) structures is crucial for enhancing DSSC performance.

Purpose of the Study:

• To investigate novel D-π-A dyes for DSSCs using computational methods.
• To evaluate the impact of different donor units and functionals on photovoltaic properties.

Main Methods:

• Density Functional Theory (DFT) and Time-Dependent DFT (TDDFT) calculations were employed.
• Various functionals (W97XD, PBEPBE, CAM-B3LYP, B3PW91) and basis sets were tested.
• Conformational analysis and electronic property evaluation were performed.

Main Results:

• CAM-B3LYP/6-311G(d,p) accurately predicted experimental absorption maxima.
• HOMO/LUMO energy levels, light-harvesting efficiency, and reorganization energies were analyzed.
• Dye D8, featuring a triphenylamine donor, exhibited superior electronic, optical, and photovoltaic characteristics.

Conclusions:

• Computational modeling is effective for designing high-performance DSSC dyes.
• The D8 dye shows significant potential for efficient solar energy applications.
• Further experimental validation of D8 is warranted.