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Showing 1 to 20 of 72 for “"P3HT"”.
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Optimization and characterization of Organic Solar cells based on Regio-P3HT and C66-PCBM blends
… poly (3-hexylthiophene-2, 5- diyl) (region-P3HT) also referred to as P3HT and a fullerene derivative [6, 6] Phenyl-C61-butyric acid methyl ester (C60-PCBM) also referred to as PCBM. The optimization, realization and characterization of these cells were done on both glass and aluminium …
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Optimization and characterization of Organic Solar cells based on Regio-P3HT and C66-PCBM blends
… poly (3-hexylthiophene-2, 5- diyl) (region-P3HT) also referred to as P3HT and a fullerene derivative [6, 6] Phenyl-C61-butyric acid methyl ester (C60-PCBM) also referred to as PCBM. The optimization, realization and characterization of these cells were done on both glass and aluminium …
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Enhancing the Photovoltaic Performance of P3HT/PDIB Silsesquioxane Donor-Acceptor System Using Spray Deposition Fabrication Technique
… acid methyl ester (P3HT:PCBM) system, but the power conversion efficiencies of these devices were not promising with respect to the literature results. Future studies of this project will focus on improving the power conversion efficiency of …
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Optical Spectroscopy Analysis of the Physicochemical Properties of Poly(3-Hexylthiophene) (P3Ht) Solutions Using Various Solvents Towards Controllable Formation of Polymeric Aggregates.
… the conjugated polymer poly(3-hexylthiophene) (P3HT). Even though P3HT in the form of thin films has been thoroughly studied in the past decades, some significant aspects of P3HT solutions have been overlooked by the scientific community, especially the blending procedure and the influence …
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Chain-Growth Polymerization of 3-Hexylthiophene Towards Well-Defined Semiconductor Block Copolymers
… point of this thesis is the control of the P3HT synthesis using Kumada catalyst transfer polymerization (KCTP). Kinetic studies of the active monomer formation via Grignard metathesis revealed that this reaction is rather slow, however, its completion is essential for controlled end groups. …
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Novel Semiconductor Block Copolymers for Organic Electronic Devices: Synthesis, Properties and Applications
… und verwendet, um mehrere Poly(3-hexylthiophen)P3HT-Blöcke mit kontrolliertem Molekulargewicht und niedriger Polydispersität herzustellen. Weiterhin wurde eine einfache und zielgerichtete Eintopfreaktion entwickelt, um P3HT-Makroinitiatoren für die NMRP herzustellen. Ausgehend von diesen …
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Morphology, charge transport properties, and molecular doping of thiophene-based organic semiconducting thin films
… 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 …
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The Physical and Spectroscopic Study of a Series of Poly(3-hexyl thiophene) Homopolymers and Poly(3-hexyl thiophene)-block-Poly(2-hydroxyethyl methacrylate) Diblock Copolymers
… physical properties of poly(3-hexyl thiophene) (P3HT) were studied. Five P3HT samples with different molecular weights were used. We have determined the relationship between physical and spectral properties of this polymer and its molecular weight. In particular, we have found that the refractive …
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Synthese und Charakterisierung von Donor-Brücke-Akzeptor-Molekülen und photoschaltbaren Systemen für Energie- und Elektronentransferuntersuchungen
… wurden neue photoschaltbare Polythienylvinylene (P3HTV) wurden erstmals synthetisiert. Die Systeme enthalten entweder eine alternierende Anordnung von 3-Hexylthienylen-Vinylen- und BTF-Grundbausteinen (Poly(3HTV-alt-BTF)) oder P3HTV-Segmente auf beiden Seiten eines BTF-Photoschalters …
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High pressure spectroscopic studies of organic device materials
… interaction. For polymer bulkheterojunctions of P3HT or PhLPPP with PCBM, the photoluminescence and absorption spectra reveal that the LUMO band-edge off-set increases with pressure. Raman studies under pressure show that the molecular ordering is barely affected by pressure in the pristine P3HT, …
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Electrical and optical characterisation of bulk heterojunction polymer-fullerene solar cells
… of the polymer- poly3(hexyl-thiophene) (P3HT), fullerene - [6,6]-phenyl-C61 butyric acid methyl ester (PCBM), and P3HT:PCBM blends of selected ratios. Interface potential barriers were estimated from Fowler-Nordheim and /or Richardson-Schottky emission theories. In case of ohmic contacts, …
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Design and Characterization of Electrospun Mats with Tailored Morphologies for Enhanced Active Layer Performance in Energy Conversion and Energy Storage Applications
… morphologies in Poly(3-hexafluoro propylene) (P3HT) films with energy storage applications using various electrospinning techniques. Electrospinning in a solvent-saturated atmosphere allows for the design of ribbon architectures with polymer domains on the order of 5-10 um. These ribbon …
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Enhanced Structure and Crystallinity of Semiconducting Polymer Films Through Electrospray Deposition
… of most interest, poly(3-hexylthiophene)(P3HT) standing out as one of the most extensively studied. Applications of P3HT as a p-type semiconductor have been demonstrated in devices like organic solar cells, light emitting diodes and transistors. Improvements in the performance of the …
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Dual Spin-Cast Thermally Interdiffused Polymeric Photovoltaic Devices
… (PCBM) and poly (3-hexylthiophene-2,5-diyl) (P3HT)-PCBM interdiffused devices are studied in detail by varying the thickness of the donor and acceptor layers as well as the annealing conditions for initial polymer layer and the time and temperature of the interdiffusion process. Auger …
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Electronic charge injection and transport in organic field-effect transistors
… in solution processed poly (3-hexylthiophene) (P3HT) field-effect devices. We measured hole transport in P3HT FETs with Au electrodes at submicron channel lengths as a function of gate voltage and a wide range of temperatures. The strongly nonlinear and gate modulated transport is shown to be …
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Functional Nanocomposites Formed by Two-step Back-filling Methods
… a mat of semiconducting poly(3-hexylthiophene) [P3HT] nanowires. P3HT nanowire films are synthesized using a novel method developed as part of this thesis; where P3HT is blended with a sacrificial polymer (polystyrene, PS), leading to spontaneous demixing of the two polymers upon casting, and …
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Development of low-temperature solution-processed colloidal quantum dot-based solar cells
… hybrid device, poly(3-hexylthiophene-2,5-diyl) (P3HT) nanofibers and CdS QDs were employed as electron donors and acceptors, respectively. Crystalline P3HT nanofibers, grown from amorphous P3HT solution, were blended with CdS QDs to form bulk heterojunctions. By adding a large quantity of poor …
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The influence of conformational order on the excited state of organic semiconductors
… untersuchte Polymer Poly(3-hexylthiophen) (P3HT) zeigt die Bedeutung des semikristallinen Verhaltens für Polymersolarzellen und Feldeffekttransistoren auf. Eine gezielte Kontrolle des semikristallinen Verhaltens ermöglicht höhere Energieeffizienzen in Solarzellen sowie hohe …
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Mechanistic Studies of the Structure-Photostability Relationship of Organic Conjugated Polymers
… a wellknown polymer, poly(3-hexylthiophene) (P3HT), and a newly synthesized CP, Poly(3,5- didodecyl-cyclopenta[2,1-b;3,4-b']dithiophen-4-one) (C6-CPDTO). The photodegradation mechanisms were studied through a combination of UV-Vis, PL, FTIR and NMR spectroscopy as well as gel permeation …
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Conjugated Polymer Brushes (Poly(3-hexylthiophene) brushes): new electro- and photo-active molecular architectures
… The process results in an interpenetrated PS-Br/P3HT network, in which relatively short poly(3-hexylthiophene), P3HT grafts emanate from long, cross-linked PS-Br chains. A further method investigated during our work was to covalently graft regioirregular P3HT to substrates modified by …
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