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Progress Report on "From Printed Electrolyte-Gated Metal-Oxide Devices to Circuits"
Gabriel Cadilha Marques1,2, Dennis Weller2, Ahmet Turan Erozan2
1Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
Advanced Materials (Deerfield Beach, Fla.)
|March 21, 2019
Summary
Printed oxide electronics using solid polymer electrolytes enable low-voltage circuits like ring oscillators and memory cells. Device variability is exploited for secure physically unclonable functions (PUFs) in low-power applications.
Area of Science:
- Materials Science
- Electronics Engineering
- Nanotechnology
Background:
- Emerging field of printed electrolyte-gated oxide electronics operating at low voltages (≤1 V).
- Shift from traditional dielectrics to solution-processable solid polymer electrolytes or ion gels for enhanced gate capacitance.
- Utilizes Helmholtz double layer for efficient low-voltage transistor gating.
Purpose of the Study:
- Review recent advancements in indium oxide n-type electrolyte-gated field-effect transistors (EGFETs).
- Highlight the development of electronic circuits using these EGFETs.
- Explore the potential of device variability in novel applications.
Main Methods:
- Fabrication of indium oxide n-type EGFETs.
- Integration of EGFETs into electronic circuits, including ring oscillators and memory cells.
- Characterization of circuit performance and device variability.
Main Results:
- Demonstrated digital performance of ring oscillator circuits from 250 Hz at 1 V up to 1 kHz.
- Successfully implemented sequential circuits like memory cells.
- Exploited inherent device variability for creating physically unclonable functions (PUFs) with unique digital responses.
- Achieved operation at very low supply voltages (0.6 V).
Conclusions:
- Printed electrolyte-gated oxide electronics offer a viable path for low-voltage, low-power applications.
- Indium oxide EGFETs are suitable for digital and sequential circuits.
- Device variability, often a challenge, can be leveraged for security applications like PUFs.