Imparting α-Borophene with High Work Function by Fluorine Adsorption: A First-Principles Investigation

Area of Science:

• Materials Science
• Condensed Matter Physics
• Surface Science

Background:

• Borophene, a 2D allotrope of boron, shows potential for electronic devices.
• Tuning the work function of 2D materials is critical for anode applications.
• Existing anode materials like gold and platinum have limitations.

Purpose of the Study:

• To investigate the effect of fluorine adsorption on the work function of α-borophene (BBP).
• To explore the potential of fluorine-adsorbed BBPs (F-BBPs) as advanced anode materials.
• To elucidate the underlying mechanisms responsible for work function enhancement.

Main Methods:

• First-principles density functional theory calculations.
• Systematic investigation of structural and electronic properties.
• Analysis of factors influencing work function, including charge transfer and energy levels.

Main Results:

• Fluorine adsorption stabilizes α-borophene.
• Work functions of F-BBPs increase sharply with fluorine content.
• F-BBP work functions approach or surpass those of Au and Pt.
• Charge redistribution due to fluorine bonding is the primary mechanism for work function increase.
• Fluorine adsorption on BBP shows a stronger effect than on silicene or graphene.

Conclusions:

• Fluorine-adsorbed borophenes are highly stable and exhibit significantly enhanced work functions.
• F-BBPs are promising candidates for next-generation anode materials in electronic devices.
• The findings provide a pathway for designing high-performance borophene-based electronic components.