Enhancing organic SCs efficiency with CSi quantum dots in A-π-D architectures

Area of Science:

• Materials Science
• Quantum Chemistry
• Renewable Energy

Background:

• Acceptor-π-donor (A-π-D) architectures are crucial for optoelectronic devices.
• Silicon-carbon quantum dots (CSiQDs) offer tunable properties for energy applications.

Purpose of the Study:

• To explore the optoelectronic and photovoltaic potential of A-π-D systems with CSiQDs.
• To investigate the impact of structural configurations and solvent effects on their properties.

Main Methods:

• Density Functional Theory (DFT) and Time-Dependent DFT (TDDFT) were employed.
• Two configurations, C-C and Si-C conformers, were analyzed.
• Energetic stability, HOMO-LUMO gap, and optical properties were calculated.

Main Results:

• All CSiQD configurations showed reliable energetic stability.
• Solvents modulated the HOMO-LUMO gap differently for C-C and Si-C conformers.
• A significant red shift in absorption spectra was observed in solvents, enhancing visible light absorption.

Conclusions:

• Si-C conformers exhibit structural adaptability for tuning optoelectronic properties.
• Lower exciton binding energies suggest improved charge separation and transport.
• These CSiQD-based A-π-D systems are promising for advanced energy harvesting technologies.