Search results for "Thin film transistors"

showing 5 items of 5 documents

A DC and small signal AC model for organic thin film transistors including contact effects and non quasi static regime

2017

Abstract We present a compact model for the DC and small signal AC analysis of Organic Thin Film Transistors (OTFTs). The DC part of the model assumes that the electrical current injected in the OTFT is limited by the presence of a metal/organic semiconductor junction that, at source, acts as a reverse biased Schottky junction. By including this junction, modeled as a reverse biased gated diode at source, the DC model is able to reproduce the scaling of the electrical characteristics even for short channel devices. The small signal AC part of the model uses a transmission line approach in order to compute the impedances of the channel and parasitic regions of the device. The overlap capacit…

DC modelMaterials scienceContact effectsparasitic capacitanceSchottky barrierOrganic thin film transistors02 engineering and technologyHybrid-pi model01 natural sciencesSignalNon-quasi static small signal modelBiomaterialsOrganic thin film transistors; DC model; AC model; Contact effects; parasitic capacitance; Non-quasi static small signal modelParasitic capacitanceTransmission line0103 physical sciencesHardware_INTEGRATEDCIRCUITSMaterials ChemistryAC modelElectrical and Electronic EngineeringElectrical impedance010302 applied physicsbusiness.industryGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsOrganic semiconductorThin-film transistorOptoelectronics0210 nano-technologybusinessOrganic Electronics
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Increased conductivity of a hole transport layer due to oxidation by a molecular nanomagnet

2008

Thin film transistors based on polyarylamine poly?N,N?-diphenyl-N,N ?bis?4-hexylphenyl?- ?1,1?biphenyl?-4,4?-diamine ?pTPD? were fabricated using spin coating in order to measure the mobility of pTPD upon oxidation. Partially oxidized pTPD with a molecular magnetic cluster showed an increase in mobility of over two orders of magnitude. A transition in the mobility of pTPD upon doping could also be observed by the presence of a maximum obtained for a given oxidant ratio and subsequent decrease for a higher ratio. Such result agrees well with a previously reported model based on the combined effect of dipolar broadening of the density of states and transport manifold filling. Peer Reviewed

Electron mobilityMaterials scienceOrganic compounds.Analytical chemistryDipolar broadeningGeneral Physics and AstronomySpin coatingHole mobilityElectronic density of statesConductivityOxidacióCompostos orgànicsElectrical resistivity and conductivity:FÍSICA [UNESCO]Molecular clustersOrganic compoundsOxidationDopingElectrical conductivityOxidation.Molecular nanomagnetMolecular magnetic clusterMolecular magnetism Nanostructured materialsSpin coatingDopingUNESCO::FÍSICAElectric conductivity.Thin film transistorsNanostructured materialsConductivitat elèctricaNanomagnet:Enginyeria electrònica::Microelectrònica [Àrees temàtiques de la UPC]Doping ; Electrical conductivity ; Electronic density of states ; Hole mobility ; Molecular clusters ; Molecular magnetism Nanostructured materials ; Organic compounds ; Oxidation ; Spin coating ; Thin film transistorsDensity of statesNanostructured materials.Hole transport layerMaterials nanoestructuratsOrder of magnitude
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A Compact SPICE Model for Organic TFTs and Applications to Logic Circuit Design

2016

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-…

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_LOGICDESIGNIEEE Transactions on Nanotechnology
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High pentacene transistor performance by engeneering morphology of solution processed thin films

2010

organic electronics thin film transistorsSettore CHIM/02 - Chimica Fisica
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Solution processes for plastic thin film transistors

2009

plastic electronics nanotechnology thin film transistorsSettore CHIM/02 - Chimica Fisica
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