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.
Results
Showing 1 to 20 of 44 for “"poly(3-hexylthiophene)"”.
-
Nanoscale studies of CVD graphene and poly(3-hexylthiophene) thin films.
… grown by chemical vapor deposition (CVD) and poly(3-hexylthiophene) (P3HT) thin films, which have great potential for use in transparent solar cells. This work outlines my findings in understanding and characterizing different substrate effects on graphene film growth, particularly useful for …
-
Preparation and Characterization of Single Walled Carbon Nanotubes Poly(3-hexylthiophene) Nanohybrids
… materials in conjunction with semiconducting polymers. Electrical and optical properties of this composite material were investigated and finally a nanostructuring technique able to create thin hybrid films with nanoscale phase separation was developed.
-
Conjugated Polymer Brushes (Poly(3-hexylthiophene) brushes): new electro- and photo-active molecular architectures
… the main methods for the synthesis of conjugated polymers for their suitability in the preparation of conductive polymer brushes. The main focus was put on the grafting of intrinsically soluble substituted regioregular polyalkylthiophenes because of their excellent optoelectronic properties. The …
-
Multi-Scale Assembly Methodologies of Poly(3-Hexylthiophene) Derivative Systems for Enhanced Optoelectronic Anisotropy
<p>Conjugated polymers represent a class of semi-conducting materials with numerous applications in optoelectronic devices, including organic light-emitting diodes, field-effect transistors, and photovoltaics. Because of the numerous advantages of macromolecular systems, including solution …
-
Structure-Function Relationships in Poly(3-hexylthiophene)s Formed via Manipulation of Oxidative Coupling Routes
… focused on the analytical characterization of poly(3-hexylthiophene), a heterocyclic conducting polymer system, with an overall objective of elucidating the effects that the experimental conditions during chemical oxidation using iron(III) chloride as an oxidant impart on the structure of the …
-
Optical Spectroscopy Analysis of the Physicochemical Properties of Poly(3-Hexylthiophene) (P3Ht) Solutions Using Various Solvents Towards Controllable Formation of Polymeric Aggregates.
… understanding of aggregates formed by conjugated polymers is of fundamental importance to consolidate them in the scenario of novel materials for organic technologies. Polymeric aggregates manifest themselves in H- and J-types or in a combination of them, such as HJ-types, and optical techniques …
-
Conducting polymer actuator enhancement through microstructuring
Electroactive conducting polymers, such as polypyrrole, polyaniline, and polythiophenes are currently studied as novel biologically inspired actuators. The actuation mechanisms in these materials are based on the diffusion of ions in and out of the polymer film. Giving ions more access to the …
-
Enhancing the Photovoltaic Performance of P3HT/PDIB Silsesquioxane Donor-Acceptor System Using Spray Deposition Fabrication Technique
… different thickness (1000 nm, 500 nm, 240 nm) of poly(3,4-ethylenedioxythipohene) polystyrene sulfonate (PEDOT.PSS) and active layers are prepared and their photovoltaic performances have been evaluated and compared by plotting the IV curves with respect to each thickness. Maintaining the distance …
-
DESIGN, SYNTHESIS, AND CHARACTERIZATION OF NANOCOMPOSITES TO IMPROVE THE PERFORMANCE OF PHOTOVOLTAIC CELLS
… 4, 9, 10-dianhydride (PTCDA), poly(3-hexylthiophene) (P3HT), multiwalled carbon nanotubes (MWCNTs), multilayer graphene (MuLG), and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM).
-
Fabricataion of Dye Sensitized Solar Cells With Enhanced Energy Conversion Efficiency
… in DSSCs. Secondly, a novel conjugated polymer with unique D-p-A structure has been synthesized and demonstrated as promising sensitizer in DSSCs. Thirdly, high-performance solid-state dye-sensitized solar cells (SDSCs) have been successfully fabricated by using organic dye as sensitizer …
-
Simulation of polymer solar cell characteristics by amps-1d
Simulation of polymer solar cell characteristics is presented in this study. The solar cells are made of materials such as the following: Poly (3-hexylthiophene): [6, 6]-phenyl C61- butyric acid methylester (P3HT: PCBM) and poly[2,1,3-benzothiadiazole-4,7-diyl[4,4- …
-
Synthesis and characterization of conducting polymer actuators
Conducting polymers are known to mechanically respond to electrochemical stimuli and have been utilized as linear actuators. To date, the most successful mechanism for actuation is ionic ingress and egress, though mechanisms based on conformational changes and molecular interactions have also been …
-
Increased Functionality Porous Optical Fiber Structures
… the porous clad fibers. Additionally, conductive poly(3,4-ethylenedioxythiophene)- poly(styrene sulfonate) (PEDOT:PSS) and photoactive polymer blend poly(3- hexylthiophene) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-)6,6)C61 (P3HT: PCBM) were deposited on the fibers using dip coating techniques. …
-
Synthesis of Conjugated Polymers
Conjugated polymers (CPs) are a unique class of materials because they possess the electronic properties of semi-conductors and processability of polymers. Their electronic and optical properties can be controlled by their chemical structures and conjugation length.To enhance the electron affinity …
-
Part I: Strategies for the Synthesis of Monodisperse Polymers and Cyclic Polymers. Part II: Synthesis of Dipyrromethenes and Aza-dipyrromethenes from Aromatic Nitriles
… an introduction to some contemporary problems in polymer chemistry, but also contains what is essentially a mini-review of catalyst transfer polymerization (CTP). This part of the chapter elucidates a number of common misunderstandings of CTP that are present in the literature. It goes onto …
-
Titanium dioxide (TiO2) as buffer layer in organic solar cell device
… and possibility of large area fabrication. Poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) blends is the most efficient fullerene derivative based donor-acceptor copolymer so far. Current conventional organic solar cell (OSC) device consist of active …
-
Electronic charge injection and transport in organic field-effect transistors
… of charge carriers 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 …
-
Functional Nanocomposites Formed by Two-step Back-filling Methods
… addition of organic ligand molecules and polymeric precursor molecules (monomers). Specifically we show that when these organic compounds are added (i.e. back-filled) into the as-deposited, wet EPD NC film, that fracture in the dried film is suppressed and photoluminscent (PL) efficiency …
-
Harnessing Vibrations for Efficient Exciton Dynamics in Semiconducting Energy Materials
… and exciton transport. In self-assembled poly(3-hexylthiophene) nanofibers we observe exceptional exciton transport that cannot be explained with current models of exciton transport, despite low energetic and structural disorder. By directly measuring the excited-state vibrations, we are …
Page 1 of 3