Monotype Organic Dual Threshold Voltage Using Different OTFT Geometries

• Published in: Crystals (Basel) Vol. 9; no. 7; p. 333
• Main Authors: Arnal, August, Martínez-Domingo, Carme, Ogier, Simon, Terés, Lluís, Ramon, Eloi
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-07-2019
• Subjects: Circuit design; Circuits; Corbino; dual-threshold inverter; Electrodes; Gates (circuits); Geometry; High gain; interdigitated; Logic circuits; modelling; Organic light emitting diodes; OTFT; Parameters; Plasma etching; Polymers; Polyvinyl alcohol; Radio frequency identification; Semiconductor devices; Semiconductors; simulation; Thin film transistors; Threshold voltage; Transistors; United Kingdom > UK
• ISSN: 2073-4352; 2073-4352
• DOI: 10.3390/cryst9070333

It is well known that organic thin film transistor (OTFT) parameters can be shifted depending on the geometry of the device. In this work, we present two different transistor geometries, interdigitated and Corbino, which provide differences in the key parameters of devices such as threshold voltage (VT), although they share the same materials and fabrication procedure. Furthermore, it is proven that Corbino geometries are good candidates for saturation-mode current driven devices, as they provide higher ION/IOFF ratios. By taking advantage of these differences, circuit design can be improved and the proposed geometries are, therefore, particularly suited for the implementation of logic gates. The results demonstrate a high gain and low hysteresis organic monotype inverter circuit with full swing voltage at the output.