OTFT modeling: Development and implementation in EDA tools

Castro-Carranza, A.; Cheralathan, Muthupandian; Iñı́guez, Benjamı́n; Pallarès, Josep; Valla, Cédric; Poullet, F.; Depeyrot, G.; Estrada, M.

doi:10.1109/cde.2013.6481339

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…This model deploys the uniform model and parameter extraction method (UMEM) approach [22, 35–37, 40, 67, 68], and as Marinov's model, it also uses a power‐law relationship between the mobility and the gate overdrive voltage

μ_{Estrada} = \frac{μ_{0}}{V_{a a}^{γ}} {()(, falsefalse| V_{GS} - V_{t} falsefalse|)}^{γ}

A note to take is that in this model the mobility does not depend on the spatial distance as in Marinov's mobility. Also, each region of operation (off‐state, subthreshold, above‐threshold) has an independent equation, and then gathered by using an external transition expression.…”

Section: Reported Otft Compact Modelsmentioning

confidence: 99%

“…Marinov et al in [27][28][29][30][31] have developed a compact generic analytical OTFT model that is based on charge drift in the presence of tail-distributed traps (TDTs) and variable-range hopping (VRH) [32][33][34]. Estrada et al in [22,[35][36][37][38][39][40] have proposed an OTFT compact model based on the unified model and parameter extraction method (UMEM) approach; another thing to mention is that its off-state, subthreshold, above-threshold equations are independent and afterwards merged into one equation using a mathematical transition function. The model developed by Li et al investigates the potential barrier between grains in a polycrystalline OSC layer.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

OTFTs compact models: analysis, comparison, and insights

Fayez

Morsi

Sabry

2017

IET Circuits, Devices & Systems

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It is challenging to develop a physically based compact model for an organic thin-film transistor (OTFT). Moreover, there is still a lack of a universal model that would cover the huge variety of materials and device structures available for stateof-the-art OTFTs. Different models of charge transport phenomenon in organic semiconductors are briefly explained, since such phenomenon constitutes the basis of a physically based compact model of an OTFT. An introduction to the basic principles dictated on compact models suitable for Computer Aided Design (CAD) simulators is stated. Six reported models are presented and analysed with an emphasis on their primary assumptions and applicability aspects. Furthermore, the selected compact models are compared with experimental results provided by a fabricated OTFT. Finally, the authors conclude recommendations for advancing OTFT compact modelling in order to reach a more enhanced model that could characterise most recently reported OTFTs.

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μ_{Estrada} = \frac{μ_{0}}{V_{a a}^{γ}} {()(, falsefalse| V_{GS} - V_{t} falsefalse|)}^{γ}

Section: Reported Otft Compact Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

OTFTs compact models: analysis, comparison, and insights

Fayez

Morsi

Sabry

2017

IET Circuits, Devices & Systems

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“…The Verilog-A language is a high-level language that uses modules to describe the structure and behavior of analog systems and their components. With the analog statements of Verilog-A, you can describe a wide range of conservative systems and signal-flow systems, such as electrical, mechanical, fluid dynamic, and thermodynamic systems Verilog-AMS HDL lets designers of analog and mixed-signal systems and integrated circuits create and use modules which encapsulate high-level behavioral descriptions as well as structural descriptions of systems and components [6]. The behavior of each module can be described mathematically in terms of its ports and external parameters applied to the module.…”

Section: Otft Device Simulationmentioning

confidence: 99%

Simulation of Organic Thin Film Transistor at both Device and Circuit Levels

Fayez

Morsy

Sabry

2015

International Conference on Aerospace Sciences and Aviation Tec

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Organic materials and devices are gaining more and more attention in microelectronics. They are dedicated to low cost applications and easy fabrication. Organic thin film transistors (OTFTs) are now making significant inroads into many new large-area applications, considering that they can be fabricated at low temperatures and with high throughput on a wide range of unconventional substrates, such as glass, plastic, fabric, and paper. In this paper an OTFT model is used in cadence, a Verilog-a code is written and used to create an OTFT device. This is done so that OTFT circuits can be simulated before fabrication. First, the model is validated by characterizing the device, showing its FET characteristics. Second, the device is used inside a circuit, and the circuit performance is analyzed. Inverter circuit is implemented using the modelled OTFT device, transfer characteristics, input and output waveforms are drawn using the simulation tool. The transistors used have 10m/20u W/L ratio, the inverter is used at 1 kHz frequency.

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“…Multiple models have been presented in the organic and printed electronics field, due to their innovative nature and the use of novel materials, fabrication techniques and architectures [7]. Different models proposed in the literature present only Direct Current (DC) [8] behaviour while others DC and Alternating Current (AC) [9][10][11]. Only a few take into account parameter variability [12,13].…”

Section: Introductionmentioning

confidence: 99%