n-Type Polymer Radio Frequency Rectifiers Operating at 18.5 GHz.

Area of Science:

• Materials Science
• Electrical Engineering
• Organic Electronics

Background:

• Growing demand for affordable radiofrequency (RF) electronics driven by AI, IoT, and telecommunications.
• Challenges in manufacturing RF devices meeting stringent performance criteria.

Purpose of the Study:

• To demonstrate high-performance organic polymeric RF Schottky diodes and rectifier circuits.
• To achieve unprecedented operating frequencies for organic RF electronics.

Main Methods:

• Fabrication of Schottky diodes using molecularly n-doped polymer (N2200) on sub-20-nm nanogap electrodes.
• Utilizing a coplanar architecture to minimize parasitic capacitances.
• Engineering electron-injecting contacts to reduce resistance and enhance performance.

Main Results:

• Achieved operation up to 18.5 GHz, the highest frequency for organic devices.
• Demonstrated low turn-on voltage (≈0.15 V), high rectification ratio (>10^5), and ultra-low capacitance (≈2 pF).
• RF rectifier circuits achieved a maximum output voltage of 1.43 V.

Conclusions:

• The developed organic Schottky diodes offer a scalable manufacturing solution for high-frequency RF applications.
• These devices are suitable for emerging RF electronics in wearables and the Internet of Things (IoT) ecosystem.
• The demonstrated performance advances organic electronics capabilities in high-frequency applications.