Static and Dynamic Response Comparison of Printed, Single- and Dual-Gate 3-D Complementary Organic TFT Inverters

Nanoscale flexible organic thin-film transistors

“…While the main drawback of electron-beam lithography is its low throughput, this does not preclude the potential of using electron-beam lithography to fabricate organic TFTs and circuits on a larger scale. Just like the throughput of other maskless patterning techniques, such as laser lithography (17)(18)(19)(20)(21) and inkjet printing (50), can be greatly enhanced by the implementation of multiple beams or multiple nozzles (51), the efficiency of electronbeam lithography can be massively increased as well by implementing arrays of individually addressable electron beams (52,53). These considerations notwithstanding the primary purpose of the work reported here was not to suggest electron-beam lithography as a method for the mass production of organic TFTs, but rather to confirm that organic TFTs with channel lengths and gate-to-contact overlaps in the range of a few hundred nanometers fabricated on flexible plastic substrates can provide useful static performance, including near-zero turn-on voltages as well as off-state drain currents, on/off current ratios, and subthreshold swings comparable to the best values reported for long-channel organic TFTs.…”

Layout-to-Bitmap Conversion and Design Rules for Inkjet-Printed Large-Scale Integrated Circuits

“…In 2016, the authors reported the development of inkjet-printed logic gates and full adders created by stacking complementary organic TFTs having exceptionally high yields. , Additionally, the work extended the stacking process to a more advanced IC design with monolithic three-dimensional (3-D) integration of dual-gate complementary TFTs for a universal 3-D logic library with seven metal layers and high design complexity . The authors conducted a comparative study on stacked single- and dual-gate TFTs in inverters and ring oscillators . In 2020, the authors discussed a charge injection efficiency of AgNP contacts by comparing thermally evaporated Ag contacts.…”

“…22 The authors conducted a comparative study on stacked single-and dual-gate TFTs in inverters and ring oscillators. 50 In 2020, the authors discussed a charge injection efficiency of AgNP contacts by comparing thermally evaporated Ag contacts. The results showed a comparable contact resistance in inkjet-printed staggered TFTs by the use of directly printed S/D electrodes on a conjugated polymer.…”

A Humid-Air-Operable, NO2-Responsive Polymer Transistor Series Circuit with Improved Signal-to-Drift Ratio Based on Polymer Semiconductor Oxidation

“…For the past few decades, organic field-effect transistors (OFETs) have attracted tremendous attention as they hold advantageous properties for a variety of applications ranging from flexible electronic papers, flat panel displays, and various physical and chemical sensors. − Owing to their biocompatibility, inherent amplification, low power requirement, and low-temperature processing, and operating conditions, OFETs have showed qualitative advantages over the inorganic counterparts . During the past few years, there has been a notable acceleration in the development of organic logic circuits, such as inverters, shift registers, comparators, amplifiers, and so on. − Their applications in organic electronics have been recognized as a key enabler for the internet of things (IOTs) as part of the “Fourth Industrial Revolution” . Moreover, due to their material characteristics and device structure, OFET-based organic integrated circuits can offer powerful and unique functionalities in chemical, physical, and biosensors, which provide the foundation of widespread application in both health and environmental monitoring. , …”

“…1−7 Owing to their biocompatibility, inherent amplification, low power requirement, and lowtemperature processing, and operating conditions, OFETs have showed qualitative advantages over the inorganic counterparts. 8 During the past few years, there has been a notable acceleration in the development of organic logic circuits, such as inverters, 9 shift registers, 10 comparators, 11 amplifiers, and so on. 12−14 Their applications in organic electronics have been recognized as a key enabler for the internet of things (IOTs) as part of the "Fourth Industrial Revolution".…”