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RESEARCH PRODUCT
A Compact SPICE Model for Organic TFTs and Applications to Logic Circuit Design
Antonio VallettaAhmet Samil DemirkolLuigi OcchipintiLuigi MariucciGiovanni MairaMattia FrascaVincenzo VinciguerraLuigi FortunaGuglielmo Fortunatosubject
Transistor modelMaterials scienceFlexible electronics; organic thin film transistors; SPICE modelingSpiceSemiconductor device modelingHardware_PERFORMANCEANDRELIABILITY02 engineering and technologyRing oscillatorIntegrated circuit01 natural scienceslaw.inventionComputer Science::Hardware ArchitectureComputer Science::Emerging Technologieslaw0103 physical sciencesElectronic engineeringHardware_INTEGRATEDCIRCUITSElectrical and Electronic EngineeringFlexible electronics010302 applied physicsChannel length modulationbusiness.industryTransistorSchottky diodeCondensed Matter::Mesoscopic Systems and Quantum Hall Effect021001 nanoscience & nanotechnologyFlexible electronicsComputer Science Applicationsorganic thin film transistorsLogic gateSPICE modelingInverterOptoelectronics0210 nano-technologybusinessHardware_LOGICDESIGNdescription
This work introduces a compact DC model developed for organic thin film transistors (OTFTs) and its SPICE implementation. The model relies on a modified version of the gradual channel approximation that takes into account the contact effects, occurring at nonohmic metal/organic semiconductor junctions, modeling them as reverse biased Schottky diodes. The model also comprises channel length modulation and scalability of drain current with respect to channel length. To show the suitability of the model, we used it to design an inverter and a ring oscillator circuit. Furthermore, an experimental validation of the OTFTs has been done at the level of the single device as well as with a discrete-component setup based on two OTFTs connected into an inverter configuration. The experimental tests were based on OTFTs that use small molecules in binder matrix as an active layer. The experimental data on the fabricated devices have been found in good agreement with SPICE simulation results, paving the way to the use of the model and the device for the design of OTFT-based integrated circuits.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-09-01 | IEEE Transactions on Nanotechnology |