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Dynamic and Tunable Threshold Voltage in Organic Electrochemical Transistors
Sean E Doris1, Adrien Pierre1, Robert A Street1
1Palo Alto Research Center-a Xerox Company, 3333 Coyote Hill Road, Palo Alto, CA, 94304, USA.
Advanced Materials (Deerfield Beach, Fla.)
|March 3, 2018
Summary
Researchers precisely tuned the threshold voltage of organic electrochemical transistors (OECTs) by controlling the gate electrode
Area of Science:
- Materials Science
- Organic Electronics
- Electrochemistry
Background:
- Organic electrochemical transistors (OECTs) are utilized in sensing, neuromorphic computing, and digital logic.
- Limited control over OECT threshold voltage hinders their integration into practical electronic circuits.
- Threshold voltage is critical for managing power consumption and noise margin in electronic circuits.
Purpose of the Study:
- To precisely tune the threshold voltage of OECTs.
- To demonstrate the application of threshold voltage tunability in electronic circuit components.
- To explore the creation of novel OECT-based oscillators.
Main Methods:
- Chemically controlling the electrochemical potential at the gate electrode to tune OECT threshold voltage.
- Fabricating inverters and amplifiers utilizing the tunable threshold voltage.
- Coupling the gate electrode with an electrochemical oscillator to create single-transistor oscillators.
Main Results:
- Achieved precise tuning of OECT threshold voltage over a range exceeding 1 V.
- Developed inverters with enhanced noise margin and amplifiers with improved gain.
- Successfully prepared single-transistor oscillators with dynamic, time-varying threshold voltages.
Conclusions:
- Electrochemistry at the gate electrode significantly influences OECT electrical properties.
- Threshold voltage tunability is key for designing advanced OECT-based circuits.
- This work enables the system-level design of low-power OECT electronics.
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