Radio Frequency Coplanar ZnO Schottky Nanodiodes Processed from Solution on Plastic Substrates

Area of Science:

• Materials Science
• Electrical Engineering
• Semiconductor Devices

Background:

• Schottky diodes are crucial for high-frequency applications.
• Solution-processed semiconductors offer potential for low-cost, large-area device fabrication.
• Achieving high performance in coplanar devices remains a challenge.

Purpose of the Study:

• To fabricate coplanar radio frequency Schottky diodes using solution-processed C60 and ZnO.
• To investigate the impact of an asymmetric nanogap electrode architecture on device performance.
• To assess the scalability and operating conditions of the fabricated diodes.

Main Methods:

• Device fabrication using adhesion-lithography.
• Utilizing C60 and ZnO as semiconductor materials.
• Employing an asymmetric nanogap electrode design.

Main Results:

• High current rectification ratio (10^3 - 10^6).
• Low operating voltage (<3 V).
• Cut-off frequencies exceeding 400 MHz.

Conclusions:

• The developed Schottky diodes demonstrate excellent radio frequency performance.
• The fabrication process is scalable, low-temperature, and high-yield, suitable for plastic substrates.
• This work presents a promising approach for low-cost, high-performance RF electronics.