High-Electron-Mobility and Air-Stable 2D Layered PtSe₂ FETs

Area of Science:

• Materials Science
• Condensed Matter Physics
• Solid State Chemistry

Background:

• Two-dimensional (2D) layered materials are crucial for next-generation electronics.
• Platinum diselenide (PtSe2) is an emerging 2D material with potential electronic properties.
• Understanding the layer-dependent electronic behavior of PtSe2 is essential for its application.

Purpose of the Study:

• To investigate the evolution of electronic and optical properties of 2D PtSe2 with varying layer numbers.
• To explore the potential of PtSe2 as a versatile electronic material.

Main Methods:

• Electrical and optical measurements were performed on PtSe2 samples.
• Density functional theory (DFT) calculations were employed to understand the electronic structure.
• Layer-dependent properties were analyzed.

Main Results:

• A distinct semiconductor-to-semimetal transition was observed as the number of PtSe2 layers increased.
• High room-temperature electron mobility was achieved in PtSe2.
• PtSe2 exhibits a significant near-infrared photo-response and enhanced air-stability compared to other 2D materials.

Conclusions:

• The layer-dependent electronic evolution makes 2D PtSe2 a highly tunable material.
• Its excellent electronic properties and stability position PtSe2 as a promising candidate for advanced electronic devices.
• Further research into PtSe2 is warranted for its integration into practical applications.