Highly transparent and conductive p-type CuI films by optimized solid-iodination at room temperature.

Area of Science:

• Materials Science
• Solid-State Chemistry

Background:

• Transparent conductive oxides (TCOs) are crucial for electronic devices.
• Developing efficient p-type TCOs remains a challenge.

Purpose of the Study:

• To synthesize p-type Copper Iodide (CuI) films using a novel method.
• To investigate the impact of precursor deposition power on CuI film properties.

Main Methods:

• Solid-phase iodination of Copper Nitride (Cu3N) precursor films at room temperature.
• Systematic investigation of structural, electrical, and optical properties.
• X-ray diffraction for structural analysis.

Main Results:

• All synthesized CuI films exhibited a zinc-blende structure.
• CuI films deposited with 140 W Cu3N precursor power showed >84% visible transmittance.
• These films achieved low resistivity (1.63 × 10^-2 Ω·cm) and a high figure of merit (140.7 MΩ^-1).

Conclusions:

• Optimized CuI films demonstrate excellent optoelectronic performance.
• CuI is a promising material for p-type transparent semiconductors.
• The synthesis method offers a viable route for transparent electronics applications.