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Dissertations / Theses on the topic 'Organic Field-Effect Transistors OFETs)'

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Published: 4 June 2021
Last updated: 26 July 2025

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1

Marjanovic, Nenad. "Photoresponsive organic field-effect transistors (photOFETs) photodoping in OFETs." Saarbrücken VDM Verlag Dr. Müller, 2006. http://d-nb.info/989371336/04.

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2

Arumugam, Sasikumar. "Synthesis and characterization of novel organic semiconducting materials for organic field effect transistors (OFETs) and photovoltaics (OPVs)." Thesis, University of Strathclyde, 2015. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25463.

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3

Liu, Shiyi. "Understanding Doped Organic Field-Effect Transistors." Kent State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=kent1574127009556301.

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4

Peltier, Jean-David. "Isomères de position d’indacénodithiophènes : synthèse, propriétés et applications en transistors organiques à effet de champ." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S138/document.

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Les transistors organiques à effet de champ (OFETs) dans lesquels le transport des charges se fait à travers un film mince de molécules organiques représentent une transformation de la technologie des transistors à effet de champ au regard de la technologie au silicium. Ils permettent notamment d’envisager le développement d’une électronique flexible à bas coût. Ce travail porte sur la synthèse, l’étude et l’utilisation en tant que couche active dans des OFETs de type n de couples d’isomères para- et méta-indacénodithiophènes (para- et méta-IDT) appauvris en électrons inédits. Une introduction
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5

Li, Xiang. "Organic Molecules for Field Effect Transistors and Redox Flow Batteries." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1601396172154889.

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6

Roberson, Luke Bennett. "Understanding organic thin film properties for microelectronic organic field-effect transistors and solar cells." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-11072005-111532/.

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Thesis (Ph. D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2006.<br>Mohan Srinivasarao, Committee Member ; David Collard, Committee Member ; Uwe Bunz, Committee Member ; Art Janata, Committee Member ; Marcus Weck, Committee Member ; Laren Tolbert, Committee Chair.
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7

Morvan, Marjorie. "Etude des transistors à effet de champ organiques : réalisation d'OFETs ambipolaires et étude des mécanismes d'injection dans les OFETs verticaux." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30175.

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L'utilisation de Transistors à Effet de Champ Organiques (OFETs) est de plus en plus attractive grâce à la possibilité de production de composants plus légers, fabriqués à un moindre coût et sur des substrats flexibles. Le fait de pouvoir coupler une fonction émission de lumière à une fonction transistor rend son utilisation d'autant plus intéressante. C'est le cas des applications d'affichage, où les pixels sont réalisés par une technologie de matrice active à diodes électroluminescentes organiques (AMOLED). Le fait d'avoir un OFET électroluminescent permet de combiner un OFET avec une diode
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8

Parry, Adam Valentine Sheridan. "Small molecule organic field effect transistors : vacuum evaporation and solution processable monolayer devices." Thesis, University of Manchester, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607412.

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The creation of organic electronics is not only an attractive replacement for amorphous silicon devices, but offers the ability to produce novel technologies such as flexible displays and chemical or biological sensors. Control of the semiconducting film for such devices is of great importance. The fabrication of monolayer devices of a high performance offer a desirable way of creating high sensitivity sensors. Achieving a high level of performance for ultra-thin and monolayer devices, where the charge transport layer is effectively the thickness of the film, requires the careful control of de
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9

Todescato, Francesco. "Functional dielectric/semiconductor and metal/semiconductor interfaces in organic field-effect transistors." Doctoral thesis, Università degli studi di Padova, 2007. http://hdl.handle.net/11577/3425125.

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The work presented in this thesis focuses on the investigation of two interfaces which play a crucial role in the physics of organic electronic devices: the dielectric/organic semiconductor and the organic semiconductor/metal ones. Regarding the dielectric/OS interface, we have deeply investigated the relationship between the SiO2 cleaning protocol or treatment and the electrical response of OFETs based on two PPV semiconducting polymers (MEH-PPV and OC1C10-PPV) and on a quarterthiopene derivative small molecule (DHCO-4T). Regarding the OS/metal interface, we investigated the electrical per
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10

BRAGA, DANIELE. "Charge transport properties of organic semiconductors: application to fiels effect transistors." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2009. http://hdl.handle.net/10281/8009.

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In order to go deeper in the knowledge of the fundamentals of Organic Field Effect Transistors (OFETs), we have characterized different typologies of OFETs using rubrene single crystals. The latter are highly ordered organic semiconductors with which high mobility transistors can be fabricated. First we have obtained a detailed picture about the properties of a rubrene single crystal, by analyzing the current-voltage (I-V) characteristics of symmetric diodes with the Space Charge Limited Current (SCLC) theory. A low density of defects and a low density of intrinsic thermally generated carriers
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11

Xu, Yong. "Caractérisation et modélisation des propretés électriques et du bruit à basse fréquence dans les transistors organiques à effet de champ (OFETs)." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00747417.

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Les transistors organiques attirent actuellement beaucoup d'attention en raison des avantages uniques par rapport à leur homologue inorganique. En revanche, la compréhension physique du fonctionnement et du transport des porteurs de charge est très limitée. L'objectif de cette thèse est de contribuer à apporter une meilleure compréhension des transistors organiques. Le Chapitre 1 présente les semi-conducteurs organiques : le mécanisme de conduction, les paramètres essentiels, les matériaux typiques etc. Le Chapitre 2 discute des transistors organi-ques en termes de structures, de mécanismes de
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12

Jimenez, Edwards. "Fabrication and transport studies of n-type OFETS using aligned array carbon nanotubes electrodes." Honors in the Major Thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/574.

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We present fabrication of n-type organic field effect transistors (OFETs) using densely aligned array carbon nanotube (CNT) electrodes. The CNTs were aligned with a high linear density via dielectrophoresis (DEP) from an aqueous solution. In order to fabricate the CNT electrodes, aligned CNTs were cut by using electron beam lithography (EBL) and precise oxygen plasma etching. The n-type OFETs were fabricated in a bottom-contact configuration by depositing a thin film of C60 molecules between the CNT source and drain electrodes, and compared against a controlled C60 OFET with gold electrodes. T
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13

ARAMBULO, PABLO CESAR SERRANO. "INVESTIGATION OF DIELECTRIC LAYER FOR THE DEVELOPMENT OF ORGANIC FIELD EFFECT TRANSISTORS (OFET) BASED ON CONJUGATED POLYMERS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33715@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Nos últimos anos, polímeros conjugados ganharam muita atenção na eletrônica orgânica por seu uso na fabricação de dispositivos flexíveis e de baixo custo. Como resultado, diferentes tipos de dispositivos têm sido desenvolvidos como: diodos emissores de luz orgânicos (OLEDs), células fotovoltaicas orgânicas (OPVs) e transistores de efeito de campo orgânicos (OFETs). Em particular, para os OFETs seu desempenho depende da interface isolante/semicondutor, principalmente, devido ao
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14

Lee, Jiho. "Impact of process parameter modification on poly(3-hexylthiophene) film morphology and charge transport." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50409.

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Organic electronics based on π-conjugated semi-conductor raises new technology, such as organic film transistors, e-paper, and organic photovoltaic cells that can be implemented cost-effectively on large-area applications. Currently, the device performance is limited by low charge carrier mobility. Poly(3-hexylthiophene) (P3HT) and organic field effect transistors (OFET) is used as a model to investigate morphology of the organic film and corresponding electronic properties. In this thesis, processing parameters such as boiling points and solubility are controlled to impact the micro- and macr
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15

Southard, Adrian E. "Exploration of novel methods for the fabrication and characterization of organic field-effect transistors and examination of factors influencing ofet performance." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9897.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2009.<br>Thesis research directed by: Dept. of Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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16

Patil, Basanagouda B. "Enhancing the electrical performance of the donor-acceptor conjugated polymer based organic field effect transistors through device engineering for electronic applications." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/207503/1/Basanagouda_Patil_Thesis.pdf.

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This thesis is a step towards developing all solution processed, low operating voltage, Donor-Acceptor Conjugated Polymers based Organic Field Effect Transistors (OFETs) for printed and flexible electronics. Main emphasis has been devoted to developing series of highly tailored device engineering strategies that bring sequential improvements to electrical characteristics. Research outcomes are guided by structure-property evaluation, including semiconductor-dielectric interface engineering for optimal response, and work-function tuning with application of self-assembled monolayers to circumven
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17

Deng, Ruonan. "Synthesis and Characterization of Novel pi-Conjugated Small Molecules and Polymers with Hydrogen Bonding & Preparation of 2D Single Crystals for Organic Field-Effect Transistors." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1491403896077883.

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18

Ramos, Benjamin. "Etude de diélectriques ferroélectriques pour une application aux transistors organiques : influence sur les performances électriques." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30304/document.

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Cette thèse porte sur l'étude d'un diélectrique de type ferroélectrique pour une application aux transistors organiques. La configuration adoptée est de type bottom-gate top- contact. Le matériau semi-conducteur utilisé est un transporteur d'électrons. Dans la première partie de ce projet, nous avons réalisé des transistors organiques à effet de champ (OFETs) avec une couche de PMMA comme diélectrique de grille. Ce matériau, très étudié et connu, permet d'avoir un composant servant de référence. Nous avons également mené une étude sur la longueur de canal, la vitesse de dépôt du semi-conducteu
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19

Chiu, Yu-Jui. "Wet Organic Field Effect Transistor as DNA sensor." Thesis, Linköping University, The Department of Physics, Chemistry and Biology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11761.

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<p>Label-free detection of DNA has been successfully demonstrated on field effect transistor (FET) based devices. Since conducting organic materials was discovered and have attracted more and more research efforts by their profound advantages, this work will focus on utilizing an organic field effect transistor (OFET) as DNA sensor.</p><p>An OFET constructed with a transporting fluidic channel, WetOFET, forms a fluid-polymer (active layer) interface where the probe DNA can be introduced. DNA hybridization and non-hybridization after injecting target DNA and non-target DNA were monitored by tra
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20

Arthur, Joshua N. "Hygroscopic insulator organic field effect transistor sensors." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/232689/1/Joshua_Arthur_Thesis.pdf.

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Hygroscopic insulator field effect transistors (HIFETs) are organic transistors with promising characteristics for biosensing applications. However, their fundamental sensing mechanisms are not yet fully understood. This thesis explores HIFET sensors through detailed electrical and optical characterisation, providing vital insights into the distinct mechanisms by which HIFETs detect biologically relevant chemicals. Hydrogen peroxide, a by-product of enzymatic reactions, oxidises the organic semiconductor, modulating the output current. Ionic solutions, such as KCl, NaCl and HCl, modulate the c
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21

Liu, Dizheng. "New pi-conjugated polymers for organic electronics : synthesis and study of materials designed for OFET and/or OLED applications." Electronic Thesis or Diss., Sorbonne université, 2020. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2020SORUS206.pdf.

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Ce travail de thèse a pour objectif le design, la synthèse et la caractérisation de nouveaux polymères π -conjugués pour des applications en OFET et en OLED. Plus précisément, le premier objectif a été de préparer deux polymères π-conjugués liquide-cristallins à groupes pendants, nommés Polythiophene-oxa et PBTTT-Tri, qui peuvent s’autoorganiser en nanostructures ordonnées et qui présentent une conduction de type p. Le second objectif a été d’explorer deux familles de nouveaux polymères D-A pouvant présenter une activité TADF : une première famille est composée de polymères (S1, S2) présentant
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22

Chua, L. L. "Organic field-effect transistors." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597679.

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In this thesis, we demonstrated that divinyltetramethyldisiloxane-benzocyclobutene (BCB), which has previously been used as an isolation dielectric in III-IV semiconductor devices, in fact makes an excellent gate dielectric material in OFETs after suitable purification. Robust ultra-thin films with high glass transition temperature and high dielectric breakdown strength can be obtained by simple spin-coating followed by rapid-thermal-anneal to above 250°C. With this material, we were able to demonstrate remarkable performance in polymer OFETs and explore several aspects of their physics. In Ch
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23

Günther, Alrun Aline. "Vertical Organic Field-Effect Transistors." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-207731.

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Diese Arbeit stellt eine eingehende Studie des sogenannten Vertikalen Organischen Feld-Effekt-Transistors (VOFET) dar, einer neuen Transistor-Geometrie, welche dem stetig wachsenden Bereich der organischen Elektronik entspringt. Dieses neuartige Bauteil hat bereits bewiesen, dass es in der Lage ist, eine der fundamentalen Einschränkungen herkömmlicher organischer Feld-Effekt-Transistoren (OFETs) zu überwinden: Die für Schaltfrequenz und An-Strom wichtige Kanallänge des Transistors kann im VOFET stark reduziert werden, ohne dass teure und komplexe Strukturierungsmethoden genutzt werden müssen.
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24

Kilinc, Volkan. "Development of organic field-effect transistor for the detection of cesium in seawater." Thesis, Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0116.

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Le césium est un métal alcalin de haute réactivité, utilisé dans de nombreuses industries. Bien que le césium soit légèrement toxique de nature, ses isotopes radioactifs sont des éléments particulièrement dangereux. Leur grande solubilité dans l'eau entraîne des effets néfastes à la fois sur l'environnement et sur la santé humaine. Avec l'essor de l’activité industrielle et nucléaire, une augmentation de la pollution des eaux par le cesium a été observé. Il est donc souhaitable de développer des techniques pour la détection rapide des ions césium dans des systèmes environnementaux complexes. D
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25

Mohammad, Ahmed Fareed. "Polyelectrolyte based organic field effect transistors." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-96237.

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In this thesis work, the fabrication of dual gate organic field-effect transistors (DGOFETs) using polyanionic proton conductor named polyvinylphosphonic acid and acrylic acid P(VPA-AA), SiO 2 as gate insulating materials and poly(3-hexylthiophene) (P3HT) as organic semiconductor have been studied. Upon operation, the top insulating layer forms large electric double layer capacitors (EDLCs)at the Ti/P(VPA-AA) and P(VPAAA)/ P3HT interfaces. This new type of robust transistor, called as EDLC-OFET, displays fast response (&lt;0.3 ms), a reasonably high field effect mobility (0.0030 cm² V -1 s-1),
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26

Ritjareonwattu, Supachai. "Ion sensitive organic field effect transistors." Thesis, Durham University, 2011. http://etheses.dur.ac.uk/3292/.

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Ion sensitive organic field-effect transistors (ISOFETs) with a metal–oxide–semiconductor field-effect transistor (MOSFET) architecture have been fabricated by using poly(3-hexylthiophene) (P3HT) and poly(methyl methacrylate) (PMMA) as the semiconductor and dielectric layers, respectively. To avoid any pin-holes in the dielectric layer, the ISOFET was coated by two separate PMMA layers. An Ag/AgCl double-junction reference electrode was used as the gate. The results show that the uncoated ISOFET exhibited transistor behaviour in aqueous solutions. However, these devices possessed a small sensi
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27

Wolanin, Piotr Jacek. "Functional organic nanomaterials for field-effect transistors." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723471.

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28

Cheng, X. "Organic field-effect transistors via inkjet printing." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597572.

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This thesis is concerned with the fabrication process, charge injection, dielectric preparation and downscaling of organic field-effect transistors via inkjet printing. To provide a general guideline of fabricating inkjet-printed short channel transistors, this thesis starts with an improved self-aligned printing (SAP) technique implemented with gold nanoparticle inks which defines a nanometer scale channel between source and drain electrodes. Electron and hole injection and transport in the channel is studied using ambipolar semiconductor F8BT. Contact resistance effects are found to be signi
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29

Luschtinetz, Regina. "Theoretical studies towards a ferroelectric organic field-effect transistor based on functional thiophene molecules." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-102735.

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Thin-film organic field effect transistors (OFETs) have attracted growing interest in recent years due to their promising electrical, optical and mechanical properties. Especially, oligothiophenes and their derivates are candidates with good prospects for application as the organic semiconducting material in such devices. They possess an extended, polarisable aromatic π-electron system that promotes a high structural arrangement of the molecules. The charge transport in the organic film is realised in the direction perpendicular to the plane of the thiophene rings via a hopping transport mecha
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30

Pospíšil, Jan. "Studium optoelektrických vlastností tenkých vrstev organických polovodičů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216901.

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The thesis is focused on the study of electric and dielectric properties of thin film organic materials that can be used as an active layer of photovoltaic cells. Primarily were studied the properties of the layers on the glass substrates, which consist of a thin active layer of phthalocyanines. On the samples were first measured current-voltage characteristics (in the dark and during the exposure) and the basic parameters of the photovoltaic conversion were determined. Finally were measured frequency dependencies (impedance spectra, in the dark and during the exposure) and the parameters of a
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31

Toader, Iulia Genoveva. "Electrical and Morphological Characterisation of Organic Field-Effect Transistors." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-100403.

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In dieser Arbeit wurden unterschiedliche Moleküle aus der Klasse der Phthalocyanine (Pc) und Pentacen-Materialien als aktive Schichten in organischen Feldeffekttransistoren (OFETs) mittels organischer Molekularstrahldeposition (OMBD) unter Hochvakuumbedingungen aufgedampft. Die elektrische Charakterisierung von Top-Kontakt (TC) und Bottom-Kontakt (BC) OFET-Konfigurationen, die Auskunft über die Ladungsträgermobilität, die Schwellspannung und das Ein/Aus-Verhältnis gibt, wurde sowohl unter Hochvakuum- als auch unter Umgebungsbedingungen an Luft durchgeführt. Für beide OFET-Konfigurationen wurde
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32

Jarrett, C. P. "Charge transport in solution-processable organic field-effect transistors." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.605062.

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The ease of processing conjugated polymers in conjunction with their novel optical and electrical properties has attracted great interest from both theoretical and applied perspectives. There has been particular interest in the development of organic transistors for mass produced low speed electronics. In this dissertation, metal-insulator-semiconductor field-effect transistors (MISFETs) are used to study the physical mechanisms of charge transport in solution-processable conjugated polymers and oligomers. The effect of dopants upon the electrical characteristics of MISFET devices is investiga
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Nasrallah, Iyad. "Investigating charge trapping effects in organic field-effect transistors." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709425.

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34

Ryu, Kyungbum. "Characterization of organic field effect transistors for OLED displays." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33853.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.<br>Includes bibliographical references (p. 49-51).<br>This thesis explores the characterization of OFETs that will aid the circuit design of OLED pixel drivers. The contact resistance, flat band voltage, and mobility are extracted from top contact and bottom contact transistors with current-voltage (I-V) and low frequency capacitance-voltage (C-V) measurements. Extraction of contact resistance is found to be crucial in characterization of bottom-contact transistors as it obscures m
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35

Lu, Kexin. "Organic semiconductors for self-assembled monolayer field effect transistors." Thesis, University of Manchester, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.559330.

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Molecular self-assembly has recently attracted significant attention for possible application in organic electronic and optoelectronic devices, such as self-assembled monolayer field-effect transistors (SAMFETs) and functional self-assembled integrated circuits. Self-assembly combines the advantages of low temperature solution processability, regio-selective monolayer adsorption and nano-scale control of film thickness. Much progress has been made in improving device performance using self-assembled monolayers (SAMs). However, most SAMFET devices reported to date showed current modulation only
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36

Vaklev, Nikolay Lyubomirov. "Organic field-effect transistors with printed dielectrics and semiconductors." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/44879.

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This thesis presents the development of organic field-effect transistors with printed dielectric and semiconductors. The device architecture was bottom-gate bottom-contact. The electrodes were fabricated via standard photolithography. The first milestones were to gravure-coat the dielectric and structure it with photolithography. Dielectric formulations were screened for their ability to photopattern with radical photoinitiators. Variable processing conditions were also investigated such as annealing time and temperature. The preferred formulation and processing conditions gave ca. 130 nm thic
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37

PRENTICE, DAVID CHARLES. "SIMULATION OF PENTACENE ORGANIC METAL-OXIDE FIELD EFFECT TRANSISTORS." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1060200543.

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38

Hague, Lee. "The vapour sensing capabilities of organic field-effect transistors." Thesis, University of Sheffield, 2012. http://etheses.whiterose.ac.uk/3196/.

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The work in this doctoral thesis is mainly concerned with the detection of volatile organic vapours (analytes) using organic field-effect transistors (OFETs) as transducers, in some cases using a ‘sensitiser layer’ on top of the devices to improve their response to certain analytes; some work has also been carried out using a gold nano-particle chemi-resistor to detect amine vapour and the development of an aqueous sensing system is also discussed. It was found that the porphyrins PtOEP (platinum (II) octaethyl porphyrin) and PtEP-I (Etioporphyrin-I) could be used as organic semiconductors and
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39

Leonardi, Francesca <1986&gt. "Self-Assembled Monolayers (SAMs) in Organic Field-Effect Transistors." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6461/1/Leonardi__dottorato.pdf.

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Organic printed electronics is attracting an ever-growing interest in the last decades because of its impressive breakthroughs concerning the chemical design of π-conjugated materials and their processing. This has an impact on novel applications, such as flexible-large-area displays, low- cost printable circuits, plastic solar cells and lab-on-a-chip devices. The organic field-effect transistor (OFET) relies on a thin film of organic semiconductor that bridges source and drain electrodes. Since its first discovery in the 80s, intensive research activities were deployed in order to control t
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Leonardi, Francesca <1986&gt. "Self-Assembled Monolayers (SAMs) in Organic Field-Effect Transistors." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6461/.

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Organic printed electronics is attracting an ever-growing interest in the last decades because of its impressive breakthroughs concerning the chemical design of π-conjugated materials and their processing. This has an impact on novel applications, such as flexible-large-area displays, low- cost printable circuits, plastic solar cells and lab-on-a-chip devices. The organic field-effect transistor (OFET) relies on a thin film of organic semiconductor that bridges source and drain electrodes. Since its first discovery in the 80s, intensive research activities were deployed in order to control t
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41

Zhang, Xiaohong. "Device engineering of organic field-effect transistors toward complementary circuits." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28150.

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Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Kippelen, Bernard; Committee Member: Brand, Oliver; Committee Member: Graham, Samuel; Committee Member: Rohatgi, Ajeet; Committee Member: Shen, Shyh-Chiang.
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42

Del, Pozo León Freddy G. "Coating engineering of composite materials for organic field-effect transistors." Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/284993.

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Esta tesis describe el desarrollo de una tecnología para depositar películas delgadas de polímeros aislantes y materiales compuestos, para aplicaciones en transistores orgánicos de efecto de campo (OFETs). Los materiales compuestos se componen de un semiconductor y un aislante. El aislante es el aglutinante y el semiconductor el material activo. Los materiales activos son polímeros o moléculas pequeñas. Los aglutinantes son estirenos, metacrilatos o combinaciones de ambos. A fin de demostrar las capacidades de la tecnología desarrollada, nombrada Bar Assisted Meniscus Shearing (BAMS), película
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43

Sinno, Hiam. "Polyelectrolyte-Gated Organic Field Effect Transistors – Printing and Electrical Stability." Doctoral thesis, Linköpings universitet, Fysik och elektroteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-98439.

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The progress in materials science during recent decades along with the steadily growing desire to accomplish novel functionalities in electronic devices and the continuous strive to achieve a more efficient manufacturing process such as low‐cost robust high‐volume printing techniques, has brought the organic electronics field to light. For example, organic field effect transistors (OFETs) are the fundamental building blocks of flexible electronics. OFETs present several potential advantages, such as solution processability of organic materials enabling their deposition by various printing meth
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44

Generali, Gianluca <1977&gt. "Organic heterostructure approach for multifunctional light-emitting field-effect transistors." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3568/1/Generali_Gianluca_tesi.pdf.

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The possibility of combining different functionalities in a single device is of great relevance for further development of organic electronics in integrated components and circuitry. Organic light-emitting transistors (OLETs) have been demonstrated to be able to combine in a single device the electrical switching functionality of a field-effect transistor and the capability of light generation. A novel strategy in OLET realization is the tri-layer vertical hetero-junction. This configuration is similar to the bi-layer except for the presence of a new middle layer between the two transport la
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45

Generali, Gianluca <1977&gt. "Organic heterostructure approach for multifunctional light-emitting field-effect transistors." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3568/.

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The possibility of combining different functionalities in a single device is of great relevance for further development of organic electronics in integrated components and circuitry. Organic light-emitting transistors (OLETs) have been demonstrated to be able to combine in a single device the electrical switching functionality of a field-effect transistor and the capability of light generation. A novel strategy in OLET realization is the tri-layer vertical hetero-junction. This configuration is similar to the bi-layer except for the presence of a new middle layer between the two transport la
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46

Zhang, Qiaoming. "Electrolyte-gated organic field-effect transistors based on organic semiconductor: insulating polymer blends." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/667288.

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La presente tesis doctoral se centra en la fabricación, optimización, caracterización y aplicación de capas activas compuestas de una mezcla de semiconductor orgánico y un polímero aislante (OSC:PS) en transistores orgánicos de efecto de campo (EGOFET) con puerta-electrolítica. El EGOFET esta considerado como una prometedora plataforma de detección en el campo de la bioelectrónica debido a su capacidad de operar en medios electrolíticos. Hasta la fecha, aunque en varios proyectos de investigación se ha demostrado su alto potencial como plataforma de detección, existe algunos problemas que debe
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47

Leydecker, Tim. "Multiresponsive and supramolecular field-effect transistors." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF056/document.

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Cette thèse a exploré comment, en mélangeant des matériaux avec des propriétés électriques différentes, il est possible de fabriquer des transistors avec des performances accrues. Des transistors organiques à effet de champ basés sur un oligothiophène (DH4T) ont été fabriqués et optimisés jusqu’à ce que les mobilités mesurées fussent supérieures à celles observées dans des films évaporés. Ces résultats ont été obtenus par le contrôle précis des interfaces et de la vitesse d’évaporation. Des polymères de type p ont été mélangés à des polymères de type n. Chaque solution obtenue a été utilisée p
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48

Chien, Yu-Mo 1980. "Survey of techniques for improving performance of organic transistors." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100224.

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Organic field-effect transistors (OFETs) with region-regular poly(3-hexylthiophene) (rr-P3HT) as active semiconductor were fabricated and characterized. Various methods for improving device performance were investigated. These methods include: the use of dip coating technique (rather than spin coating), thermal annealing, polymer doping with iron chloride (FeCl 3), and stamping of "dry" poly(dimethylsiloxane) (PDMS) stamp before polymer deposition.<br>Through experimental results, it is clear that thermal annealing increases charge carrier mobility of P3HT OFETs. On average an increase of four
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AL-SHADEEDI, AKRAM. "LATERAL AND VERTICAL ORGANIC TRANSISTORS." Kent State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent1492441683969202.

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Kalb, Wolfgang L. "Trap states in organic field-effect transistors: quantification, identification and elimination /." Zürich : ETH, 2009. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18324.

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