Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Electrochemical doping"”.
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Electrical and Optical Probing of Extremely Large Planar Polymer Light-Emitting Electrochemical Cells
Polymer light-emitting electrochemical cells (LECs) are unique solid-state light-emitting devices operating on the principle of in situ electrochemical doping and the formation of a p-n junction. Compared to conventional polymer light-emitting diodes, LECs possess some favorable device …
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Investigating physical properties of novel carbon-based materials
… of the material change in the presence of metal doping (in the case of carbon aerogels) and. electrochemical doping (in the case of carbon nanotubes). In addition, we present the results of Raman spectroscopy performed on high thermal conductivity graphitic foarns, which consist of a weblike …
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Role of polythiophene- based interlayers from electrochemical processes on organic light-emitting diodes
… are obtained by the electropolymerization or the electrochemical doping/dedoping of a spin-coated layer. Their electrical properties and energetics are tailored by electrochemical adjustment of their doping levels in order to improve the hole-injection from the anode as well as the performance of …
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Evaluations of single walled carbon nanotubes using resonance Raman spectroscopy
… the Fermi level of SWNT bundles is raised by electrochemical doping and Raman spectra are collected in situ. It is determined that for the G-band of SWNTs, the dependence of frequency on Fermi energy is /[beta][sub]G = 271cm⁻¹ per hole per C-atom for metallic SWNTs with d[sub]f …
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Charge Transport in Field-Effect and Ion-Gel Gated Conjugated Polymers
… but also examine the effect of chalcogens upon doping. It is considered that interchain interactions are enhanced by introducing a single chalcogen atom into the backbone of the polymer. As a result, the doped samples adopt better electrical properties. In our opinion, the enhanced properties …
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Simulation der Nanostrukturbildung in Alkali-dotierten Fullerenschichten
… temperature among organic superconductors. A new electrochemical method of synthesis of potassium and rubidium fullerides has been recently developed by Professor Dunsch and coworkers in the department of electrochemistry and conductive polymers at IFW Dresden. The process of electrochemical …
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The Bilayer Polymer Light-Emitting Electrochemical Cells
Polymer light-emitting electrochemical cells (LECs) are solid-state polymer devices that form light-emitting p-n junctions in situ from electrochemical doping, which occurs under an applied voltage or current bias. LECs typically consist of a combination of a luminescent polymer, an electrolyte …
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Polymer Light-Emitting Electrochemical Cells Enhanced with Bipolar Electrode Arrays: In Situ Doping and Formation of Multiple p-n Junctions
Polymer light-emitting electrochemical cells (PLECs) are organic solid-state light-emitting devices operating on in situ electrochemical doping and p-n junction formation in a mixed conductor active layer. PLECs have been extensively researched for their attractive device characteristics and …
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Light Emission and Charge Transport in Reverse Biased Polymer Junctions
… Among organic electronic devices, light-emitting electrochemical cells (LECs) are unique in that they possess a true p-n junction formed by in situ electrochemical doping reactions. Similar to an inorganic p-n junction LED in many aspects, LECs have some very desirable device characteristics such …
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The synthesis and testing of fast switching, novel conjugated polymers for electrochromic applications
… a reversible colour transformation switch upon electrochemical doping, such as colour bleaching transformations. Herein, this thesis discusses how organic chemistry facilitates the advantage of structurally modifying monomeric heterocyclics to fine tune materials with interesting optical and …
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Thermoelectric and charge transport properties in doped and aligned conjugated polymers
… through methodologies such as ion-exchange doping, high-temperature rubbing and electrochemical doping. Central to this investigation is a deepened comprehension of the transport physics and the modelling of temperature dependence in doped conjugated polymers, pivotal for unlocking their …
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Electroluminescence in ion gel gated organic polymer semiconductor transistors
… (CMS) study we show that there is a prominent electrochemical doping occurring with gate voltages. Further, owing to the movement of ions with voltages, irrespective of the location of electrodes, we show that the ion gel, bilayer planar devices emit light in Vds > Eg/e regime (without any gate …
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Thermoelectric Properties of Organic Polymers
… design, uniaxial alignment, and advanced doping techniques. This dissertation explores the relationship between the enhanced thermoelectric properties and the structure of organic polymers. It delves into both innovative new materials systems and established typical materials. First it …
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Interfacial Properties of Graphene for (Opto)Electronic Devices
… that I studied in this thesis is the controlled doping of SLG up to 2 eV using electrochemical doping. I transferred SLG on a conductive oxide and electrochemically gated SLG via an ionic liquid by applying a bias voltage between SLG and another conductive oxide. This doping technique paves the …