![]() ![]() ![]() The HVG function applied on the YVG function is used to determine the mobility enhancement factor γ > 0, which allows for defining the γYVG function for OTFT that is linearly proportional to the gate-overdrive voltage (VG–VT). The YVG function compensates for the impact of the contact resistance Rc on the I–V characteristics of the OTFT. The precision is achieved by utilizing the mathematical functions YVG and HVG that are derived from measured current-voltage (I–V) characteristics, in a proper sequence. We demonstrate a precise parameter extraction for organic thin-film transistors (OTFTs) operating in the linear regime. Our work provides insights that can guide further improvement of flexible printed organic FETs and ICs towards the realisation of increasingly complex organic ICs and unconventional electronic applications. The study also showed that the parasitic capacitances are dominant factors that determine the transient behaviour of the ring oscillator. This study revealed design rules to guide fabrication of the 3D structure of the inverter. We also conducted a SPICE simulation of both static and dynamic behaviours of flexible printed organic complementary inverters and ring oscillators. ![]() In particular, we performed compact modelling of the flexible printed organic FETs to determine transistor parameters from measured electrical characteristics, and to optimize the design of transistors for a balanced inverter. We report an in-depth study of three-dimensional (3D) inkjet-printed flexible organic field-effect transistors (FETs) and integrated circuits (ICs), and demonstrate the necessity, the feasibility and the key aspects of modelling-driven design and analysis. ![]()
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