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 77 for “"Conjugated polymer"”.
-
A conjugated polymer plastic gel
We present a gel route to process highly oriented conjugated polymer films and fibers. The incorporation of hexafluoroisopropanol, a strong and stable dipolar group, to the polythiophene backbone enhances the solubility and especially, the hydrogen bond forming capabilities of the polymer. This …
-
Carbon Nitride and Conjugated Polymer Composite Materials
… individually and as composites with the organic conjugated polymers polybithiophene (PBT) and poly(3-hextlthiophene) (P3HT). At low nitrogen content, the film structure was dominated by graphitic sp2 percolation networks, whereas at higher nitrogen contents CNx films started to demonstrate …
-
Triplet exciton dynamics in conjugated polymer films
… knowledge of the excited state dynamics in conjugated polymers is necessary for efficient use of these novel materials. Triplet excitons are believed to play an important role in conjugated polymer-based device operation. Triplet excitons are also believed to play a primary role in …
-
Conjugated polymer based materials via the incorporation of polymerizable units
Since the discovery of conducting polymers (CPs), efforts have focused on synthesizing CPs with improved processability, and finding new applications for the unique conjugated structure of CPs. This Thesis details the development of new CP based materials by block copolymerization and/or …
-
SPECTROSCOPIC, IMAGING, AND DOPING STUDIES OF PUSH-PULL CONJUGATED POLYMER SOLAR CELLS
… is needed to propel the use of PCPDTBT and other conjugated molecules into widespread use in solar cells. The research presented herein is aimed at improving our understanding of the electronic processes that allow PCPDTBT to outperform its homopolymer counterparts in OPV devices. Electronic …
-
Controlling the architectures and optical properties of conjugated polymer aggregates and films
The semiconducting properties of conjugated polymers are finding use in various optoelectronic applications, including chemical sensors and light-emitting diodes. In this thesis, we investigate aggregation in conjugated polymers and how it affects the optical properties of these organic materials. …
-
Designing conjugated polymer-based functional materials via the incorporation of supramolecular complexities
… engineering is the creation of molecule- or polymer- based devices that mimic the integrated functions of their macroscopic (and often inorganic) counterparts. Because of their unique photophysical and/or redox properties, supramolecular systems and conjugated polymers (CPs) have emerged as …
-
Conjugated Polymer Brushes (Poly(3-hexylthiophene) brushes): new electro- and photo-active molecular architectures
… to screen 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 …
-
The Hall Effect for Probing Conjugated Polymer Charge Transport in High Carrier Density Regimes
Conjugated polymer semiconductors hold much promise when it comes to their potential for novel applications. Their ability to form uniform films from solution is generally thought to be of high value to industry, opening up the possibilities promised by large area electronics manufacturing. Probing …
-
Thermoelectric Properties and Transport of Semicrystalline Conjugated Polymer and Single-Wall Carbon Nanotube Composites
Research into carbon nanotubes (CNT):polymer composites for thermoelectric applications have greatly expanded in recent years, aiming to combine the high power factor of CNT networks and the low thermal conductivity of polymer matrix. Many attempts have been made on achieving the …
-
Electrolyte Dependence on the Electrochemical and Optoelectronic Activity of a Conjugated Polymer in Organic Solvents
… on the redox and charge transport properties of conjugated polymers. Many high-performance electroactive polymers are hydrophobic and require processing in organic solvents. As such, these materials are characterized in nonaqueous electrolyte systems to evaluate fundamental electrochemical …
-
Influence of Solvent Additives on Stability, Performance and Morphology of Conjugated Polymer/Fullerene Based Organic Bulk Heterojunction Solar Cells
<p>Organic bulk heterojunction solar cells use polymer thin film technology which is cost effective, flexible and easily processable. P3HT:PCBM bulk heterojunction solar cell is most widely studied organic solar cell. Solvent additives have been shown to enhance power conversion efficiency, but its …
-
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
In block-selective solvent, the rod-coil block copolymers can form various micellar structures. With block copolymers that contain a conjugated polymer block, the conformation of the conjugated polymer can be reflected by spectral changes in the solution. Therefore, it is of interest to study the …
-
Supramolecular assemblies of conjugated sensory polymers and the optimization of transport properties
… the role of chemical structure of a sensory polymer in the selectivity of a conjugated polymer-based fluorescent sensor has been examined. In two different sensory systems for the detection of potassium ions and a nitroaromatic explosive TNT, respectively, key chemical design parameters …
-
Applications of Single-Walled Carbon Nanotubes in Organic Electronics
… sorting of semiconducting SWNTs using π-conjugated polymers is an effective and efficient technique to enrich large quantities of ultra-pure semiconducting SWNTs. Following semiconducting enrichment, SWNTs can be incorporated into electronic devices. This thesis focuses on the enrichment …
-
The design and synthesis of benzodithiophene-containing poly(arylene ethynylene)s
… overview of the properties and applications of conjugated polymers, with a particular focus on poly(arylene ethynylene)s. We discuss the synthesis and photophysical properties of poly(arylene ethynylene)s, as well as their behavior in the solid state and at the air-water interface. We also …
-
Probing Convergence in Orthogonal Conjugated Catalysis by T4 Lysozyme Utilizing Biophysical Characterization
<p>Conjugated polymers have become highly attractive as they afford unique material properties that make them promising for a wide range of applications, such as photovoltaics and drug delivery systems. However, these conjugated polymers require extensive synthetic steps involving hazardous organic …
-
Grafted poly(phenylene-ethynylene) : optical and optoelectronic applications
Poly(phenylene-ethynylene) (PPE), a fully conjugated polymer system, exhibits high solution state quantum yields, narrow emission profiles, and wide band gaps allowing for blue emission, making them ideal candidates for display applications. Unfortunately, PPEs have received little attention in …
-
Thermally responsive polymers and their applications
This thesis focuses on development of polymeric materials that can alter their functions according to temperature changes. We chose poly(N-isopropylacrylamide) (polyNIPA) as a platform, which phase-separates from water upon heating. The thermally responsive properties and applications of polyNIPA …
Page 1 of 4