Three-Terminal Floating-Gate Cell for Threshold-Voltage Control of Organic Thin-Film Transistors

A floating-gate (FG) cell as a circuit-level approach to control the threshold voltage of organic thin-film transistors (TFTs) operated in the transdiode configuration is presented. Charging and discharging of the FG are achieved by controlling the charge leakage through the gate dielectric of one of the organic TFTs that constitute the FG cell. Using programming voltages not exceeding 4 V, systematic tuning of the threshold voltage to values between −0.5 and 2.6 V was achieved. The versatility of the concept is demonstrated by employing organic-TFT-based FG cells as transdiodes with programmable threshold voltage in passive rectifiers and diode-load inverters fabricated on flexible, transparent plastic substrates. Rectifiers with programmable FG cells show flatter frequency response, improved 3-dB point, and reduced ripple compared to conventional rectifiers. Inverters with programmable FG-transdiode load have larger small-signal gain, larger output-voltage swing, and larger noise margins than conventional diode-load inverters.

[1]  G. H. Ibrahim,et al.  High-Frequency Rectifiers Based on Organic Thin-Film Transistors on Flexible Substrates , 2020, IEEE Transactions on Electron Devices.

[2]  Joachim N. Burghartz,et al.  Flexible low-voltage high-frequency organic thin-film transistors , 2020, Science Advances.

[3]  T. Okamoto,et al.  High‐Speed Organic Single‐Crystal Transistor Responding to Very High Frequency Band , 2020, Advanced Functional Materials.

[4]  Matthias Keller,et al.  Modified Bootstrap Switching Scheme for Organic Digital Integrated Circuits , 2019, IEEE Solid-State Circuits Letters.

[5]  H. Klauk,et al.  Compact DC Modeling of Organic Thin-Film Transistors Including Their Parasitic Non-Linear Contact Effects Based on a Novel Extraction Method , 2019, IEEE Transactions on Electron Devices.

[6]  Joachim N. Burghartz,et al.  Stencil lithography for organic thin-film transistors with a channel length of 300 nm , 2018, Organic Electronics.

[7]  Joachim N. Burghartz,et al.  A digital library for a flexible low-voltage organic thin-film transistor technology , 2017 .

[8]  H. Klauk,et al.  Below-one-volt organic thin-film transistors with large on/off current ratios , 2017 .

[9]  Ute Zschieschang,et al.  Low-voltage organic transistors with steep subthreshold slope fabricated on commercially available paper , 2015 .

[10]  Arthur H. M. van Roermund,et al.  Positive-Feedback Level Shifter Logic for Large-Area Electronics , 2014, IEEE Journal of Solid-State Circuits.

[11]  Martijn Kemerink,et al.  Operational Stability of Organic Field‐Effect Transistors , 2012, Advanced materials.

[12]  Takao Someya,et al.  Control of threshold voltage in low-voltage organic complementary inverter circuits with floating gate structures , 2011 .

[13]  Wim Dehaene,et al.  Unipolar Organic Transistor Circuits Made Robust by Dual-Gate Technology , 2011, IEEE Journal of Solid-State Circuits.

[14]  K. Kotani,et al.  High-Efficiency Differential-Drive CMOS Rectifier for UHF RFIDs , 2009, IEEE Journal of Solid-State Circuits.

[15]  Maurits Ortmanns,et al.  Experimental results on power efficient single-poly floating gate rectifiers , 2009, 2009 IEEE International Symposium on Circuits and Systems.

[16]  P. Heremans,et al.  Influence of transistor parameters on the noise margin of organic digital circuits , 2006, IEEE Transactions on Electron Devices.

[17]  Kris Myny,et al.  50 MHz rectifier based on an organic diode , 2005, Nature materials.

[18]  Joachim N. Burghartz,et al.  A 3.3 V 6-Bit 100 kS/s Current-Steering Digital-to-Analog Converter Using Organic P-Type Thin-Film Transistors on Glass , 2012, IEEE Journal of Solid-State Circuits.

[19]  Yung-Hui Yeh,et al.  Pseudo-CMOS: A Design Style for Low-Cost and Robust Flexible Electronics , 2011, IEEE Transactions on Electron Devices.