Thematische Bibliographien / Processing of organic semiconducting thin films

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Auswahl der wissenschaftlichen Literatur zum Thema „Processing of organic semiconducting thin films“

Autor: Grafiati

Veröffentlicht am 25. Mai 2024

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Zeitschriftenartikel zum Thema "Processing of organic semiconducting thin films"

Harding, Cayley R., Jonathan Cann, Audrey Laventure, Mozhgan Sadeghianlemraski, Marwa Abd-Ellah, Keerthan R. Rao, Benjamin Sidney Gelfand et al. „Acid dyeing for green solvent processing of solvent resistant semiconducting organic thin films“. Materials Horizons 7, Nr. 11 (2020): 2959–69. http://dx.doi.org/10.1039/d0mh00785d.

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Pickett, Alec, Aiswarya A. Mohapatra, Suman Ray, Christopher Robledo, Kartik Ghosh, Satish Patil und Suchismita Guha. „Interfacial Effects of UV-Ozone Treated Sol-Gel Processable ZnO for Hybrid Photodetectors and Thin Film Transistors“. MRS Advances 4, Nr. 31-32 (2019): 1793–800. http://dx.doi.org/10.1557/adv.2019.298.

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ABSTRACTHybrid organic-inorganic semiconducting interfaces have attracted attention in photodiodes and field-effect transistors (FETs) due to the realization of intrinsic p-n junctions and their mechanical flexibility. With the difficulty of developing high-mobility n-type organic semiconductors due to the necessity of low LUMO levels and ambient environment stability, solution processable inorganic materials are an excellent alternative. ZnO is an intrinsic n-type semiconductor which is non-toxic and sol-gel processable, creating avenues for film patterning and fully solution processed devices. We report the improvement of electron mobilities in ZnO FETs through simple UV-Ozone processing which reduces lattice defects within the film and at the SiO2/ZnO interface. Treated ZnO films yield electron mobilities close to 10-2 cm2/Vs and on/off current ratios of 104 while non-treated films have mobilities on the order of 10-5 cm2/Vs and an order of magnitude lower on/off current ratios. Treated films also yield improved photoresponsivity and detectivity in hybrid ZnO-organic photodetectors.

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Thuau, Damien. „(Invited) Organic Thin Films Transistors: From Mechanical to Biochemical Sensors“. ECS Meeting Abstracts MA2022-02, Nr. 35 (09.10.2022): 1287. http://dx.doi.org/10.1149/ma2022-02351287mtgabs.

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Interest in organic electronic materials, and in particular their potential for low-cost fabrication over large areas, led to the development of organic field-effect transistors (OFETs). The potential of OFETs has been demonstrated in a variety of applications, including pixel drivers for displays, bionic skin, wearable electronics and sensitive chemical sensors that can operate in aqueous environments. OFETs use conjugated, semiconducting small molecules and polymers and offer an alternative to inorganic devices for applications in which facile processing on different substrates and tunable electronic properties are required. The flexibility requirement implies either performance stability towards deformation, or conversely, detectable response to the deformation itself. The knowledge of the electromechanical response of organic semiconductors to external stresses is therefore not only interesting from a fundamental point of view, but also necessary for the development of real world applications. To this end, this presentation highlights the importance of the choice of functional materials (organic semiconductors and dielectrics) as well as the relationship structure/properties in transistors based sensors. Organic semiconductors (OSCs) are promising transducer materials when applied in OFETs taking advantage of their electrical properties that highly depend on the morphology of the semiconducting film. The effects of a high-performance p-type organic semiconductor, namely dinaphtho [2,3-b:2,3-f] thieno [3,2–b] thiophene (DNTT) thickness on its piezoresistive sensitivity are presented. A critical thickness corresponding to the appearance of charge carriers percolation paths in the material can tune the gauge factors (GFs) by a factor 10. In addition, single crystal OSC are regarded as promising electroactive materials for strain sensing application. Herein this talk, we will present how strain induces simultaneous mobility changes along all three axes, and that in some cases the response is higher along directions orthogonal to the mechanical deformation. These variations cannot be explained by the modulation of intermolecular distances, but only by a more complex molecular reorganisation, which is particularly enhanced, in terms of response, by p-stacking and herringbone stacking. This microscopic knowledge of the relation between structural and mobility variations is essential for the interpretation of electromechanical measurements for crystalline organic semiconductors, and for the rational design of electronic devices. Alternatively, this talk will highlight how the use of an active gate dielectric layer such as poly(vinylidenefluoride/trifluoroethylene) (P(VDF-TrFE)) piezoelectric polymer can lead to highly efficient electro-mechanical sensitivity. In such case, the sensing mechanism of the electro-mechanical transducer originates from the piezoelectric material itself, which affects the electrical behavior of the transistor as signature of a mechanical event. The second part of this talk will focus on another kind of TFT based sensor, namely the organic electrochemical transistors (OECTs) which have found recently applications in chemical and biological sensing and interfacing and neuromorphic computing. OECT rely on ions that are injected from the electrolyte into polymer-based mixed conductors, thereby changing its doping state and hence its conductivity. While great progress has been achieved, organic mixed conductors frequently experience significant volumetric changes during ion uptake/rejection, i.e., during doping/ de-doping and charging/discharging. Although ion dynamics may be enhanced in expanded networks, these volumetric changes can have undesirable consequences, e.g., negatively affecting hole/electron conduction and severely shortening device lifetime. New materials able to transport ions and electrons/holes and that exhibits low swelling will be presented, expanding the materials-design toolbox for the creation of low-swelling soft mixed conductors with tailored properties and applications in bioelectronics and beyond.

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Maeda, Akihiro, Aki Nakauchi, Yusuke Shimizu, Kengo Terai, Shuhei Sugii, Hironobu Hayashi, Naoki Aratani, Mitsuharu Suzuki und Hiroko Yamada. „A Windmill-Shaped Molecule with Anthryl Blades to Form Smooth Hole-Transport Layers via a Photoprecursor Approach“. Materials 13, Nr. 10 (18.05.2020): 2316. http://dx.doi.org/10.3390/ma13102316.

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Preparation of high-performance organic semiconductor devices requires precise control over the active-layer structure. To this end, we are working on the controlled deposition of small-molecule semiconductors through a photoprecursor approach wherein a soluble precursor compound is processed into a thin-film form and then converted to a target semiconductor by light irradiation. This approach can be applied to layer-by-layer solution deposition, enabling the preparation of p–i–n-type photovoltaic active layers by wet processing. However, molecular design principles are yet to be established toward obtaining desirable thin-film morphology via this unconventional method. Herein, we evaluate a new windmill-shaped molecule with anthryl blades, 1,3,5-tris(5-(anthracen-2-yl)thiophen-2-yl)benzene, which is designed to deposit via the photoprecursor approach for use as the p-sublayer in p–i–n-type organic photovoltaic devices (OPVs). The new compound is superior to the corresponding precedent p-sublayer materials in terms of forming smooth and homogeneous films, thereby leading to improved performance of p–i–n OPVs. Overall, this work demonstrates the effectiveness of the windmill-type architecture in preparing high-quality semiconducting thin films through the photoprecursor approach.

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Gazioglu, Dilek Taskin, Fatih Dumludag, Mustafa Coskun und Savas Berber. „Fabrication and characterization of P3HT --- based OFETs with TPU --- polymeric gate dielectric prepared by electrospinning method with different thicknesses“. Физика и техника полупроводников 56, Nr. 7 (2022): 719. http://dx.doi.org/10.21883/ftp.2022.07.52767.9808a.

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Current work reports the manufacturing and electrical characteristics of organic field-effect transistors in the top-contact bottom-gate configurations utilizing solution - processed poly (3-hexylthiophene) films as an active semiconducting layer and thermoplastic polyurethane as gate insulator. A spin coating chemical polymerization technology and an electrospinning tool for polymeric mats production were used to prepare uniform organic thin films with controlled thickness from their solutions. Commercially available flat glass slides were used as the starting substrate. To form the gate electrode a thin layer of metal such as gold (Au) or silver (Ag) was deposited on the glass surface substrates by thermal evaporation through a shadow mask. Thermoplastic polyurethane insulating films with different thicknesses were electrospun from precursor solution on the substrates with Au or Ag electrodes. Patterned Au and/or Ag drain and source electrodes were deposited directly on the surface of as - fabricated poly(3-hexylthiophene) organic semiconductor layer. We used two kinds of metals that have different work functions and their combinations to investigate the influence of the source, drain and gate electrode materials on the output characteristics of fabricated organic thin film transistors. All fabricated of organic field-effect transistor devices showed typical p-type channel characteristics. Additionally, the effects of thermoplastic polyurethane gate dielectric thickness as well as the influence of processing parameters on electrical performances of organic field-effect transistors fabricated were also investigated. Results show that all developed transistors exhibit good and stable performance up to a relatively high drain voltage of ~50 V and the drain-source current up to ~0.5 μA. Keywords: organic field-effect transistors, P3HT organic semiconductor, TPU gate dielectric, electrical characteristics.

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Lkhamsuren, Enkhtur, und Galbadrakh Ragchaa. „Carrier mobility in field effect transistors based on copper-phthalocyanine thin films with different phase structure“. Физик сэтгүүл 15, Nr. 309 (15.03.2022): 17–22. http://dx.doi.org/10.22353/physics.v15i309.254.

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Using annealing procedure at different temperatures after deposition at room temperature we obtained copper- phthalocyanine (CuPc) thin films with a — and p —phase structure. A phase structure of thin films was controlled by X-ray diffraction method, morphology was controlled by SEM. The field effect transistors was fabricated by high vacuum deposition of CuPc thin film (thickhess of 100 nm) on Si02 substrate which acting as gate contact. Gold drain and source contacts deposited on the top of active layer of FET. From measured current voltage measurements calculated mobility and concentration of charge carriers in FET. These parameters depend on phase structure of CuPc thin film, and characteristics of our FET are comparable with values of other authors. CuPc is commercially available macro cyclic metal complex that can be easily obtained in large quantity and high purity. Together with other phthalocyanine derivatives, the chemically and thermally stable CuPc has wide applications in dye processing, spectral sensitization, chemical sensors, and optical data storage [3-4]. The semiconducting behavior of metal phthalocyanines was first observed in 1948 and they have since attracted great interest in advancement of protptype organic semiconductors. Among the metal substituted phthalocyanines CuPc has been found superior properties [5-7], such as phenomena of field dependent and wavelength-dependent efficiency in an organic static induction transistors, and stabilizing role of CuPc layer on a highly stable organic electroluminescent device based on thin film Alq, and indicated a very weak interaction between CuPc and Au at the interface. In general, phthalocyanine materials can exist in several crystalline polymorphs, including a-, p -, x-and y - structure, and the most well known are the thermally metastable a- and p - [8-10], Phthalocyanine films deposited at room temperature usually consist of a-phase crystallites (at sublimation pressure of less than 10 Pa). At higher deposition pressures or at substrate temperature above 210°C, the p -phase directly obtained [11], Although it is well known that a-phase crystallites undergo a phase transformation into P -phase by treatment in various organic suspension media [12,13] or during annealing at higher temperatures [14,15], only some authors describe the nature of the a—>p phase transformation of copper phthalocyanine thin films with a thickness of less than 100 nm [8,14-15].

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McCulloch, Iain, Clare Bailey, Kristijonas Genevicius, Martin Heeney, Maxim Shkunov, David Sparrowe, Steven Tierney et al. „Designing solution-processable air-stable liquid crystalline crosslinkable semiconductors“. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364, Nr. 1847 (22.08.2006): 2779–87. http://dx.doi.org/10.1098/rsta.2006.1854.

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Organic electronics technology, in which at least the semiconducting component of the integrated circuit is an organic material, offers the potential for fabrication of electronic products by low-cost printing technologies, such as ink jet, gravure offset lithography and flexography. The products will typically be of lower performance than those using the present state of the art single crystal or polysilicon transistors, but comparable to amorphous silicon. A range of prototypes are under development, including rollable electrophoretic displays, active matrix liquid crystal (LC) displays, flexible organic light emitting diode displays, low frequency radio frequency identification tag and other low performance electronics. Organic semiconductors that offer both electrical performance and stability with respect to storage and operation under ambient conditions are required. This work describes the development of reactive mesogen semiconductors, which form large crosslinked LC domains on polymerization within mesophases. These crosslinked domains offer mechanical stability and are inert to solvent exposure in further processing steps. Reactive mesogens containing conjugated aromatic cores, designed to facilitate charge transport and provide good oxidative stability, were prepared and their liquid crystalline properties evaluated. The organization and alignment of the mesogens, both before and after crosslinking, were probed by grazing incidence wide-angle X-ray scattering of thin films. Both time-of-flight and field effect transistor devices were prepared and their electrical characterization reported.

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Jones, Leighton, Xujun Luo, Algy Kazlauciunas und Long Lin. „A bifunctional smart material: the synthesis of a metal-free black pigment for optoelectronic applications from an organic semiconducting molecular rod“. Pigment & Resin Technology 47, Nr. 1 (02.01.2018): 14–28. http://dx.doi.org/10.1108/prt-02-2017-0014.

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Purpose This paper aims to synthesise and evaluate the properties of a novel smart material consisting of a metal-free organic black pigment with a unique chromophore for bifunctional applications in optoelectronics. Design/methodology/approach A robust and highly efficient organic reaction, namely, a double [2 + 2] cycloaddition, was deployed to transform a rod-like structure for charge-transfer applications to a strongly conjugated light-absorbing molecule for both optical and electronic applications. Findings The synthesis and characterisation of an air-stable metal-free black pigment is reported, which contains an unconventional donor–acceptor panchromatic chromophore with an absorption window spanning 600 nm; the compound was synthetically converted from an organic semiconducting molecular rod and retains strong charge-transfer properties. The chromophore comprises tetracyanoquinodimethane adduct on either side of a dithienothiophenyl core, capped with hexyl thiophenes that ensure solubility in common organic solvents. Its propensity to form excellent thin films on different substrates such as glass and paper, with a total opacity in organic solvent, gives it the potential for wide-ranging applications in organic optoelectronics. Research limitations/implications The synthetic chemistry and fundamental properties are investigated in the present study, with more detailed treatments and analysis to be soon developed. One leading smart material is presented, with further derivatives under investigation. Practical implications The work presented shows the possibility of converting structures from one application to another with relative ease, but how they retain properties for both, using well-known and facile conditions. Originality/value The structures are novel and an enhanced air-stable organic panchromatic chromophore is reported for processing in common organic solvents.

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Mirka, Brendan, Nicole Rice, Phillip Williams, Mathieu Tousignant, Nicholas Boileau, William Bodnaryk, Darryl Fong, Alex Adronov und Benoit Lessard. „Influence of Excess Conjugated Wrapping Polymer in Semiconducting Single-Walled Carbon Nanotube Dispersions“. ECS Meeting Abstracts MA2023-01, Nr. 10 (28.08.2023): 1214. http://dx.doi.org/10.1149/ma2023-01101214mtgabs.

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Single-walled carbon nanotubes (SWNTs) are promising nanomaterials for incorporation into organic electronic devices (OEDs), with the potential to fabricate flexible devices while exploiting inexpensive solution-processing techniques. As-synthesized SWNTs are insoluble and comprised of a mixture of metallic and semiconducting SWNTs (sc-SWNTs), necessitating dispersal and purification before integration into OEDs. Refinement of conjugated polymer extraction techniques has allowed for the isolation of sc-SWNTs from metallic in a reproducible and scalable manner. The availability of highly-pure sc-SWNT materials has facilitated the production of thin-film transistors (TFTs) with very high charge carrier mobilities, outperforming organic small molecule and polymer semiconductors. However, the realization of commercial OED applications of polymer-sorted sc-SWNTs have not yet been achieved, partially due to the prohibitive time and materials costs associated with purifying sc-SWNTs. Current protocols for dispersing sc-SWNTs with conjugated polymers involve three broad steps: (1) dispersion of bulk SWNT material, (2) removal of non-dispersed carbonaceous materials, and (3) removal of excess polymer through filtration or centrifugation. The final step of removal of excess polymer is time-consuming and wasteful, but viewed as necessary for preparing high-performing TFTs, as the conjugated polymer has much lower performance compared to SWNTs. In this study we performed the first systematic investigation of the effect of excess polymer on SWNT TFT performance. Three SWNT concentrations were investigated, with varying ratios of excess polymer added to each. TFT device performance was monitored using several metrics, including: mobility, threshold voltage, on/off ratios and hysteresis. Characterization of large numbers of replicate TFT devices determined that below a threshold amount of excess polymer the presence of excess polymer did not have a negative impact on device performance. Detailed analysis of the sc-SWNT films through Raman spectroscopy and atomic force microscopy (AFM) confirmed that a simple rinsing step was sufficient to remove all the unbound conjugated polymer from the substrate surface without affecting the sc-SWNT network. The volume of solvent required for the rinsing step was substantially lower than that required for filtration or centrifugation steps. Furthermore, at higher SWNT concentrations the excess polymer prevented nanotube bundling, resulting in moderate improvements in both mobility and on/off ratios. Our results were reproducible for two different conjugated polymer sc-SWNT systems, demonstrating the versatility of this procedure.

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Iwamoto, Mitsumasa. „Nanometric electrostatic interfacial phenomena in organic semiconducting thin films“. Journal of Materials Chemistry 10, Nr. 1 (2000): 99–106. http://dx.doi.org/10.1039/a903004b.

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Dissertationen zum Thema "Processing of organic semiconducting thin films"

Liu, Xiao. „Elaboration and characterization of organic semiconducting thin films for optoelectronics“. Electronic Thesis or Diss., Sorbonne université, 2020. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2020SORUS205.pdf.

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Ce travail de thèse a pour but l’élaboration et la caractérisation de film minces semi-conducteurs à partir de différents matériaux p-conjugués (DAL1, BTBT, C8-BTBT-C8, C10-PBT etd iI(T2)2) pour des applications en optoélectronique. L’objectif général a porté sur l’optimisation de leurs méthodes de fabrication, de manière à améliorer les performances des composants électroniques correspondant (transistors à effet de champs et diodes électroluminescentes organiques)
This PhD work aims at the elaboration and characterization of organic semiconducting thin films based on different π-conjugated materials (DAL1, BTBT, C8-BTBT-C8, C10-PBT and iI(T2)2) for organic optoelectronics applications. The general goal is to optimize their fabrication methods in order to maximize their device performances of the corresponding optoelectronic devices (Organic field effect transistors and Organic light emitting diodes)

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Al-Mohamad, Ali. „The preparation and measurement of organic thin films and applications to electronic devices“. Thesis, University of Salford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.255247.

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Pingel, Patrick. „Morphology, charge transport properties, and molecular doping of thiophene-based organic semiconducting thin films“. Phd thesis, Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2014/6980/.

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Organic semiconductors combine the benefits of organic materials, i.e., low-cost production, mechanical flexibility, lightweight, and robustness, with the fundamental semiconductor properties light absorption, emission, and electrical conductivity. This class of material has several advantages over conventional inorganic semiconductors that have led, for instance, to the commercialization of organic light-emitting diodes which can nowadays be found in the displays of TVs and smartphones. Moreover, organic semiconductors will possibly lead to new electronic applications which rely on the unique mechanical and electrical properties of these materials. In order to push the development and the success of organic semiconductors forward, it is essential to understand the fundamental processes in these materials. This thesis concentrates on understanding how the charge transport in thiophene-based semiconductor layers depends on the layer morphology and how the charge transport properties can be intentionally modified by doping these layers with a strong electron acceptor. By means of optical spectroscopy, the layer morphologies of poly(3-hexylthiophene), P3HT, P3HT-fullerene bulk heterojunction blends, and oligomeric polyquaterthiophene, oligo-PQT-12, are studied as a function of temperature, molecular weight, and processing conditions. The analyses rely on the decomposition of the absorption contributions from the ordered and the disordered parts of the layers. The ordered-phase spectra are analyzed using Spano’s model. It is figured out that the fraction of aggregated chains and the interconnectivity of these domains is fundamental to a high charge carrier mobility. In P3HT layers, such structures can be grown with high-molecular weight, long P3HT chains. Low and medium molecular weight P3HT layers do also contain a significant amount of chain aggregates with high intragrain mobility; however, intergranular connectivity and, therefore, efficient macroscopic charge transport are absent. In P3HT-fullerene blend layers, a highly crystalline morphology that favors the hole transport and the solar cell efficiency can be induced by annealing procedures and the choice of a high-boiling point processing solvent. Based on scanning near-field and polarization optical microscopy, the morphology of oligo-PQT-12 layers is found to be highly crystalline which explains the rather high field-effect mobility in this material as compared to low molecular weight polythiophene fractions. On the other hand, crystalline dislocations and grain boundaries are identified which clearly limit the charge carrier mobility in oligo-PQT-12 layers. The charge transport properties of organic semiconductors can be widely tuned by molecular doping. Indeed, molecular doping is a key to highly efficient organic light-emitting diodes and solar cells. Despite this vital role, it is still not understood how mobile charge carriers are induced into the bulk semiconductor upon the doping process. This thesis contains a detailed study of the doping mechanism and the electrical properties of P3HT layers which have been p-doped by the strong molecular acceptor tetrafluorotetracyanoquinodimethane, F4TCNQ. The density of doping-induced mobile holes, their mobility, and the electrical conductivity are characterized in a broad range of acceptor concentrations. A long-standing debate on the nature of the charge transfer between P3HT and F4TCNQ is resolved by showing that almost every F4TCNQ acceptor undergoes a full-electron charge transfer with a P3HT site. However, only 5% of these charge transfer pairs can dissociate and induce a mobile hole into P3HT which contributes electrical conduction. Moreover, it is shown that the left-behind F4TCNQ ions broaden the density-of-states distribution for the doping-induced mobile holes, which is due to the longrange Coulomb attraction in the low-permittivity organic semiconductors.
Organische Halbleiter kombinieren die molekulare Vielfalt und Anpassbarkeit, die mechanische Flexibilität und die preisgünstige Herstellung und Verarbeitung von Kunststoffen mit fundamentalen Halbleitereigenschaften wie Lichtabsorption und -emission und elektrischer Leitfähigkeit. Unlängst finden organische Leuchtdioden Anwendung in den Displays von TV-Geräten und Smartphones. Für die weitere Entwicklung und den Erfolg organischer Halbleiter ist das Verständnis derer physikalischer Grundlagen unabdingbar. Ein für viele Bauteile fundamentaler Prozess ist der Transport von Ladungsträgern in der organischen Schicht. Die Ladungstransporteigenschaften werden maßgeblich durch die Struktur dieser Schicht bestimmt, z.B. durch den Grad der molekularen Ordnung, die molekulare Verbindung von kristallinen Domänen und durch Defekte der molekularen Packung. Mittels optischer Spektroskopie werden in dieser Arbeit die temperatur-, molekulargewichts- und lösemittelabhängigen Struktureigenschaften poly- und oligothiophenbasierter Schichten untersucht. Dabei basiert die Analyse der Absorptionsspektren auf der Zerlegung in die spezifischen Anteile geordneten und ungeordneten Materials. Es wird gezeigt, dass sich hohe Ladungsträgerbeweglichkeiten dann erreichen lassen, wenn der Anteil der geordneten Bereiche und deren molekulare Verbindung in den Schichten möglichst hoch und die energetische Unordnung in diesen Bereichen möglichst klein ist. Der Ladungstransport in organischen Halbleitern kann außerdem gezielt beeinflusst werden, indem die Ladungsträgerdichte und die elektrische Leitfähigkeit durch molekulares Dotieren, d.h. durch das Einbringen von Elektronenakzeptoren oder -donatoren, eingestellt werden. Obwohl der Einsatz dotierter Schichten essentiell für effiziente Leuchtdioden und Solarzellen ist, ist der Mechanismus, der zur Erzeugung freier Ladungsträger im organischen Halbleiter führt, derzeit unverstanden. In dieser Arbeit wird der Ladungstransfer zwischen dem prototypischen Elektronendonator P3HT und dem Akzeptor F4TCNQ untersucht. Es wird gezeigt, dass, entgegen verbreiteter Vorstellungen, fast alle F4TCNQ-Akzeptoren einen ganzzahligen Ladungstransfer mit P3HT eingehen, aber nur 5% dieser Paare dissoziieren und einen beweglichen Ladungsträger erzeugen, der zur elektrischen Leitfähigkeit beiträgt. Weiterhin wird gezeigt, dass die zurückgelassenen F4TCNQ-Akzeptorionen Fallenzustände für die beweglichen Ladungsträger darstellen und so die Ladungsträgerbeweglichkeit in P3HT bei schwacher Dotierung absinkt. Die elektrischen Kenngrößen Ladungsträgerkonzentration, Beweglichkeit und Leitfähigkeit von F4TCNQ-dotierten P3HT-Schichten werden in dieser Arbeit erstmals in weiten Bereichen verschiedener Akzeptorkonzentrationen untersucht.

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Hassan, Aseel Kadhim. „Studies in electronic conduction processes in organic semiconducting thin films of copper phthalocyanine prepared by evaporation“. Thesis, Keele University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306847.

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Roodenko, Ecatherina. „Surface and interface structure of electrochemically grafted ultra-thin organic films on metallic and semiconducting materials“. Berlin mbv, 2008. http://d-nb.info/989679683/04.

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Shihub, Salahedin Ibrahim. „Studies of the electrical and structural properties of organic semiconducting thin films of thermally evaporated cobalt phthalocyanine“. Thesis, Keele University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301164.

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Pingel, Patrick [Verfasser], und Dieter [Akademischer Betreuer] Neher. „Morphology, charge transport properties, and molecular doping of thiophene-based organic semiconducting thin films / Patrick Pingel. Betreuer: Dieter Neher“. Potsdam : Universitätsbibliothek der Universität Potsdam, 2014. http://d-nb.info/1049328426/34.

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Kulkarni, Sachin Shashidhar. „Effect of composition, morphology and semiconducting properties on the efficiency of CuIn₁₋x̳Gax̳Se₂₋y̳Sy̳ thin-film solar cells prepared by rapid thermal processing“. Orlando, Fla. : University of Central Florida, 2008. http://purl.fcla.edu/fcla/etd/CFE0002467.

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Chang, Mincheol. „Processing parameter effects on the molecular ordering and charge transport of poly(3-hexylthiophene) thin films“. Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54281.

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Conjugated polymers have attracted much interest as promising alternatives to inorganic semiconductors, due to their low-temperature, solution-based processability, which may provide for low-cost, large-area electronic device fabrication. However, commercialization of polymer-based electronic devices has been restricted owing to low device performance of solidified thin-films. In order to enhance charge transport of polymer semiconductor thin-films, the self-organization of organic polymer semiconductors into ordered supramolecular assemblies has been achieved by tuning a range of process parameters including film deposition method (spin vs. drop cast), solvent boiling point (low vs. high boiling point), polymer-dielectric interface treatment, and post-deposition processing (solvent vapor or thermal annealing). However, these strategies give rise to limitations for large-scale high-throughput processing due to associated pre- and/or post semiconductor deposition steps. Therefore, in this thesis, we identify alternative processing parameters (i.e., hydrogen bonds between good and poor solvents, UV irradiation to polymer precursor solutions, and combination of sonication and subsequent UV irradiation to polymer precursor solutions) which can contribute to enhancement in charge transport of a model polymer semiconductor, poly(3-hexylthiophene) (P3HT), eliminating the additional pre- and/or post-steps mentioned above. Further, we understand of how the processing parameters effect intra- and intermolecular interactions of the polymer chains, micro- through macroscopic morphologies, and charge transport characteristics of the resultant films.

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Huq, Abul Fatha Md Anisul. „Interfacial and Solvent Processing Control of Phenyl-C61-Butyric Acid Methyl Ester (PCBM) Incorporated Polymer Thin Films“. University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1427746818.

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Bücher zum Thema "Processing of organic semiconducting thin films"

McGuiness, C. L., R. K. Smith, M. E. Anderson, P. S. Weiss und D. L. Allara. Nanolithography using molecular films and processing. Herausgegeben von A. V. Narlikar und Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533060.013.23.

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This article focuses on the use of molecular films as building blocks for nanolithography. More specifically, it reviews efforts aimed at utilizing organic molecular assemblies in overcoming the limitations of lithography, including self-patterning and directed patterning. It considers the methods of patterning self-assembled organic monolayer films through soft-lithographic methods such as microcontact printing and nanoimprint lithography, through direct ‘write’ or ‘machine’ processes with a nanometer-sized tip and through exposure to electron or photon beams. It also discusses efforts to pattern the organic assemblies via the physicochemical self-assembling interactions, including patterning via phase separation of chemically different molecules and insertion of guest adsorbates into host matrices. Furthermore, it examines the efforts that have been made to couple patterned molecular assemblies with inorganic thin-film growth methods to form spatially constrained, three-dimensional thin films. Finally, it describes a hybrid self-assembly/conventional lithography (i.e. molecular rulers) approach to forming nanostructures.

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Buchteile zum Thema "Processing of organic semiconducting thin films"

Park, Hui Joon, und L. Jay Guo. „Processing Technologies of Semiconducting Polymer Composite Thin Films for Photovoltaic Cell Applications“. In Semiconducting Polymer Composites, 171–90. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527648689.ch6.

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Karimov, Khasan, Stefano Bellingeri und Yoshiyuki Abe. „Physical Vapor Transport of CuPc Organic Thin Films in High Gravity“. In Processing by Centrifugation, 99–106. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-0687-4_13.

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Niesen, Thomas P., Joachim Bill und Fritz Aldinger. „Deposition of Titania Thin Films on Different Functionalized Organic Self-Assembled Monolayers“. In Ceramics - Processing, Reliability, Tribology and Wear, 289–94. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607293.ch49.

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Han, Dae-Hee, und Byung-Eun Park. „Paper Transistors with Organic Ferroelectric P(VDF-TrFE) Thin Films Using a Solution Processing Method“. In Topics in Applied Physics, 291–305. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1212-4_14.

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Bao, Z., und J. A. Rogers. „Thin-film Transistors From Organic Semiconducting Materials, Processing Technologies for“. In Encyclopedia of Materials: Science and Technology, 9319–23. Elsevier, 2001. http://dx.doi.org/10.1016/b0-08-043152-6/01680-6.

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Dziike, Farai, Phylis Makurunje und Refilwe Matshitse. „Biomass Electrospinning: Recycling Materials for Green Economy Applications“. In Electrospinning - Material Technology of the Future [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.103096.

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The development and advancement of electrospinning (ES) presents a unique material technology of the future achieved by fabricating novel nanofibrous materials with multifunctional physical (three-dimensional [3D] structure, nanoscalable sizes) and chemical characteristics (functional groups). Advancing the possibility of preparing various classes of novel organic and inorganic electrospun fiber composites with unique features such as polymer alloys, nanoparticles (NPs), active agents, and devices. This feature gives provision for internal access of the setup parameters such as polymer precursor material, polymer concentration, solvent, and the method of fiber collection that consequentially improves the intrinsic control of the construction mechanism of the final nanofibrous architecture. In synthetic electrospinning, the nanofibrous material processing allows for internal control of the electrospinning mechanism and foster chemical crosslinking to generate covalent connections between polymeric fibers. Comparing technologies according to materials of the future revealed that electrospinning supports the formation of micro-scale and in some cases nano-scale fibers while the formation of thin films is facilitated by the electrospraying system. Recent innovations point to various biomass waste streams that may be used as an alternative source of polymeric materials for application in electrospinning to produce materials for the future.

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Konferenzberichte zum Thema "Processing of organic semiconducting thin films"

Case, William E. „Properties and applications of thin-film phase transition materials“. In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/oam.1985.thn1.

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Thin films of phase transition materials offer high-resolution 2-D formats for switching, recording, and processing optical signals. In most instances, a reversible, physical transformation is accompanied by large changes in both electric and optical properties. Examples cited include organics, rare-earth monochalcogenides, and vanadium dioxide. The external driving or control mechanism for vanadium dioxide is temperature; near 67°C the material changes from semiconducting to metallic behavior. Moreover, injection of energy (~15 mJ/cm2) into a small portion of the film causes the transition to occur only in that local region. The resulting local change may be either removed (dynamic operation) or stored indefinitely (memory operation). These options are possible because the material exhibits hysteresis, i.e., the curve describing the state of the film vs temperature is double valued in the transition region. A number of application concepts based on these unusual film properties are discussed.

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Ko, Seung Hwan, Heng Pan, Costas P. Grigoropoulos und Dimos Poulikakos. „Air Stable High Resolution OFET (Organic Field Effect Transistor) Fabrication Using Inkjet Printing and Low Temperature Selective Laser Sintering Process“. In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15038.

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A novel high resolution OFET (organic field effect transistor) fabrication process has been developed to realize low cost, large area electronics at low processing temperature without use of expensive, high temperature lithography process in vacuum. A drop-on-demand (DOD) ink-jetting system was used to print gold nano-particles suspended in Alpha-Terpineol solvent. Continuous Argon ion laser was irradiated locally to evaporate carrier solvent as well as sinter gold nano-particles in order to fabricate metal source and drain electrodes with high resolution and minimal thermal damage to the substrate. PVP (poly-4-vinylphenol) in Hexanol solvent and air-stable semiconductor polymer (Carboxulate - functionalized Polythiophenes) in 1,2-dichlorobenzene (o-DCB) solvent were spin-coated to form thin film of dielectric layer and semiconducting active layer. All of the processes were carried out in plastic-compatible low temperature, ambient air and atmospheric pressure environment. The OFETs showed good accumulation mode p-channel transistor behavior with carrier mobility of 0.01cm2/V·s and Ion/Ioff ratio of ranging from 103 to 104.

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Belfield, Kevin, Xiaobin Ren, David J. Hagan, Eric W. Stryland, Vladislav Dubikovsky und Edward J. Miesak. „Two-photon photoinitiated polymer processing and microfabrication“. In Organic Thin Films. Washington, D.C.: OSA, 1999. http://dx.doi.org/10.1364/otf.1999.sub2.

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Kearns, Patrick, Aaron Massari und Zahara Sohrabpour. „MIXED POLARIZATION VIBRATIONAL SUM FREQUENCY GENERATION SPECTRA OF ORGANIC SEMICONDUCTING THIN FILMS“. In 69th International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2014. http://dx.doi.org/10.15278/isms.2014.tb09.

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Videlot-Ackermann, Christine, Jorg Ackermann, Hugues Brisset, Pascal Raynal, Fabrice Moggia, Frederic Fages, Koji Kawamura und Noriyuki Yoshimoto. „Conducting and semiconducting end-capped oligothiophenes for thin films devices in organic electronics“. In IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics. IEEE, 2006. http://dx.doi.org/10.1109/iecon.2006.347818.

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Krueger, Joerg, und Wolfgang Kautek. „Femtosecond-pulse laser processing of metallic and semiconducting thin films“. In Photonics West '95, herausgegeben von Jan J. Dubowski. SPIE, 1995. http://dx.doi.org/10.1117/12.206276.

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Schoonderbeek, Aart, Maik Bärenklau, Roland Rösch, Burhan Muhsin, Oliver Haupt, Harald Hoppe, Dieter Teckhaus und Uwe Stute. „Laser structuring of thin films for organic solar cells“. In ICALEO® 2010: 29th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2010. http://dx.doi.org/10.2351/1.5061964.

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Benight, Stephanie J., Scott R. Hammond, Lewis E. Johnson und Delwin L. Elder. „Processing of organic electro-optic materials for commercial applications“. In Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVII, herausgegeben von Wounjhang Park, André-Jean Attias und Balaji Panchapakesan. SPIE, 2020. http://dx.doi.org/10.1117/12.2569081.

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Nunzi, Jean-Michel, Stephane Delysse, Nicola Pfeffer und Fabrice Charra. „Organic Thin-Films For Spatial Light Modulation“. In Organic Thin Films for Photonic Applications. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/otfa.1995.mc.4.

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In the field of image and beam processing, there is great need for devices in which a spatial light-intensity profile such as an image can be recorded and transformed into a transmission or a phase retardation profile. A solution in order to process a still increasing volume of information issued from sensors and data banks is indeed to treat it in parallel. And as information is often available as optical images, a simple idea is to pre-process or to compress it prior to acquisition. This is performed using correlation or novelty filtering techniques [1]. A key device in this respect is the optically addressed spatial light modulator (SLM) [2]. It permits the achievement of input functions in optical image processors based on holographic and Fourier optics. The principle of the SLM process is the same as with the more classical silver-halide photography, except that SLM must perform real-time operations. The drawback of silver-halide photography is indeed the delay, larger than a minute, between exposure and processing. Different techniques, with commercially available devices, already permit the achievement of real-time spatial light modulation. They use a juxtaposition of photoconductor and liquid-crystal films in an artificial photorefractive-like sandwich [3]. However, operation with typical pixel densities of 1µm2, beam surfaces of 1cm2 and processing speeds larger than 100MHz is far from being realised with commercial SLMs. It is the reason for considering the performances offered by organic thin films in this respect [4].

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Yamamoto, Tsuyoshi, Shigehiro Teramoto, Akihiro Tagaya, Eisuke Nihei, Takeshi Kinoshita, Yasuhiro Koike, Keisuke Sasaki und Kazuhito Fujii. „Organic Dye-Doped Polymer Optical Fiber Amplifier“. In Organic Thin Films for Photonic Applications. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/otfa.1993.wb.4.

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There has been great interest in development of polymer optical fibers (POFs) for local area networks (LANs), datalinks, applications for automobile and medical applications etc., because of virtues, such as easy processing, handling, low cost and large diameter, enabling high efficiencies of fiber coupling and beam insertion.(1) In those days, highly developed Er3+-doped optical fiber amplifier can obtain much more functional applications. On the other hand, until now, POF system has no amplifying element, so applications of POFs are positioned in hopeless situation. Our proposals and experiment presented in this paper concerning graded-index (GI) Rhodamine B doped POF-Amplifiers (POFA) could give a break-through on such situation. The POFA gave sufficient gain with extremely short length of fiber for its large cross sections. Also, high-power amplification was tried with large core diameter fiber.

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