2D Ultrawide Bandgap Semiconductors: Odyssey and Challenges

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Two-dimensional (2D) ultrawide bandgap (UWBG) semiconductors are gaining attention for high-power transparent electronics, deep-UV photodetectors, flexible skins, and energy-efficient displays.
• These materials exhibit superior optical transparency, tunable conductivity, high mobility, and excellent gate dielectric properties compared to narrow bandgap semiconductors.
• Current research focuses on metal oxides, chalcogenides, halides, and nitrides as key 2D UWBG semiconductor families.

Purpose of the Study:

• To provide an up-to-date review of recent advancements in 2D UWBG semiconductor materials.
• To explore novel physical properties and emerging applications of these materials.
• To summarize current challenges and future opportunities in the field of 2D UWBG semiconductors.

Main Methods:

• Comprehensive literature review of recent research on 2D UWBG semiconductors.
• Analysis of material properties, including optical transparency, electrical conductivity, and mobility.
• Summarization of applications in transistors, photodetectors, touch screens, and inverters.

Main Results:

• Identification of key 2D UWBG semiconductor classes: metal oxides, chalcogenides, halides, and nitrides.
• Demonstration of unique properties such as high optical transparency and tunable electrical conductivity.
• Overview of successful applications as passive or active layers in electronic devices.

Conclusions:

• 2D UWBG semiconductors represent a promising class of materials for next-generation electronic devices.
• Continued research into novel materials and properties will unlock further potential.
• Addressing existing challenges is crucial for realizing the full scope of applications.