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 20 of 23 for “"Transparent electrodes"”.
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Hybrid materials for flexible, transparent electrodes
… Vapour Deposited graphene hybrid for flexible, transparent heaters. The transfer of graphene – a key step in the fabrication of the hybrid- was first optimised with a Failure Modes and Effects Analysis method to ensure a graphene layer free from mechanical defects (< 2%). The novel electrode was …
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Ultra-thin transparent electrodes for energy applications
… unique feature of being contemporarily optically transparent and electrically conducting, Transparent Conductive Oxides (TCOs) play a fundamental role in many technologies: communications, information, energy, buildings. Up to now, the most diffused material in the TCO s family was indium tin …
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Graphene as transparent electrodes for solar cells
… chemical vapor deposition (CVD) graphene as the transparent conductor in photovoltaic devices. Transparent conducting oxides currently dominate the transparent conductor market but suffer drawbacks that make them unsuitable certain applications. Graphene is mechanically robust, chemically inert, …
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Alternative transparent electrodes for organic light emitting diodes
… methods which could be presented for transparent electrode materials because indium tin oxide (ITO), a widely used material as a transparent electrode for OLEDs, is less than optimal due to its high element price. In this work, alternative transparent electrodes for OLEDs as a …
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Development of Solution-Processed Stable Silver Nanowire Networks for Transparent Electrodes
The continued use of indium tin oxide (ITO) as a transparent electrode for next generation optoelectronic devices will face severe challenges, including the scarcity of raw materials, high cost of processing, and lack of mechanical flexibility. Emerging transparent electrodes composed of …
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Fully Solution Processed PEDOT:PSS and Silver Nanowire Semi-Transparent Electrodes for Thin Film Solar Cells
… integrated photovoltaics (BIPV), such as semitransparent organic solar cells (OSC) for power generating windows, is a promising method for implementing renewable energy under the looming threat of depleting fossil fuels. OSC require a solution processed transparent electrode to be cost …
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Structure-property engineering and device fabrication of conjugated polymers by chemical vapor deposition
… conducting thin film can be used as flexible and transparent electrodes in many electronic devices. Previously, the key problem limiting the electrical conductivity of PEDOT is the difficulty of maintaining a high carrier mobility simultaneously with a high carrier density in this polymer.
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Transparent Conductors based on Ag Nanolayer embedded in Semiconductor Oxides
… and characterization of ultrathin TCO/Ag/TCO transparent electrodes. The study, is also focused on the optimization of structural, optical and electrical properties for several applications. The thesis is organized as follows: Chapter 1: it introduces the optoelectronic devices and their …
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Synthesis of mono-to-multi-layer graphene for transparent electrode applications
In this thesis, mono-to-multilayer graphene for transparent electrode applications was synthesized by Atmospheric Pressure Chemical Vapor Deposition (APCVD) and the key factors that determine the electrical and optical properties of the graphene were isolated. This work involves optimizing APCVD …
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Investigation of doped ZnO by Molecular Beam Epitaxy for n- and p-type Conductivity
… currently dominant ITO in industries as n-type transparent electrodes and the difficulty in achieving reliable and reproducible p-type ZnO. On the one hand, n-type ZnO heavily doped with Al or Ga (AZO or GZO) is the most promising to replace ITO due to the low cost, abundant material resources, …
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Smoothing silver nanowires for optoelectronic applications
… processing. The composite is flexible, optically transparent, surface smooth, atmospherically stable and conductive, proving itself as a potential replacement for traditional transparent electrodes.
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Development of an electronic paper prototype on bacterial cellulose using electrochromic systems
… The whole system was then cased between transparent electrodes in three different device structures. Upon application of switching potentials (2-6V); a reversible color change was demonstrated down to a standard pixel sized area (~100μm²). The major advantages of such a prototype are its …
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Single layer graphene as a stable and transparent electrode for the measurement of non-aqueous electrogenerated chemiluminescence and charge transfer inverse photoemission
… (SLG) obtained by chemical vapor deposition as a transparent electrode material for use in coupled electrochemical and spectroscopic experiments in non-aqueous media through electrogenerated chemiluminescence (ECL). SLG was used with classical ECL luminophores, rubrene, …
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Polymers via chemical vapor deposition and their application to organic photovoltaics
… within vacuum-processed OPVs, including as a transparent anode, as an anode buffer layer on ITO transparent electrodes, and as a cathode buffer layer in electrically inverted devices. By using in situ shadow masking, the oCVD PEDOT electrodes are vapor-patterned over large areas to …
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Density functional theory investigations of graphene-based heterostructures
… high-performance, low-power electronics, and as transparent electrodes. The present study employs Density Functional Theory (DFT) to identify the atomic and electronic structure of graphene (Gr) on three different types of substrates: transition metals (nickel, palladium), insulators (hBN) and …
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Novel solution processing and characterization of aligned carbon nanotube materials for rapid composition-property relationship determination and additive manufacturing
… fabric, and polycarbonate. We prepare flexible transparent electrodes with properties matching the performance obtained when using superacid solvents. Additionally, pToS gently solidifies upon exposure to ambient moisture, enabling 3D-printing neat structures with commercially available …
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Next generation optoelectronic devices for energy applications utilising metal oxides, bismuth oxyhalides and lead halide perovskites
… light. By stacking LHP devices (with transparent electrodes on both sides) over silicon bottom cells, tandem photovoltaics with efficiencies exceeding silicon single-junction devices can be achieved. But a critical challenge is that the transparent top electrode is grown by sputter …
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Growth Study and Characterization of TiO2 Based Thin Films for Low Temperature Synthesis of Transparent Conductive Films
Transparent conductive oxides (TCOs) are of increasing importance for displays, photovoltaics, architectural and window glass technologies. The most utilized TCOs are tin-doped indium oxide (ITO), which is suffering from scarcity, lower transmittance in the near infrared region, poor chemical …
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Towards high performance graphene nanoelectronics: materials, contacts and interfaces
… Å). Some of these applications include flexible transparent electrodes, heat spreaders and fast analog devices and integrated circuits. These large-scale implementations require the ability to inexpensively fabricate wafer-scale pristine graphene sheets with optimized, reliable, and reproducible …
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Structure and properties of transparent conductive ZnO films grown by pulsed laser deposition (PLD)
… layer for GaN‐based devices, visible‐range transparent electrodes for solar cell and flat panel displays, surface acoustic wave devices, piezoelectric and piezooptic devices, gas sensors for oxygen, and integrated optical devices such as optical waveguides. Furthermore, ZnO is nontoxic and …
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