Dissertations / Theses on the topic 'Polythiophene'
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Dulgerbaki, Cigdem. "Synthesis And Characterization Of Polythiophene/montmorillonite And Polythiophene/polypropylene Composites." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607762/index.pdf.
Full textelectrical conductivities were measured by four probe technique. Since PTP/MMT composites are unprocessable PTP/polypropylene(PP) composites were prepared. Amounts of PTP were changed in the range 2-30 % by weight in the composites. Mechanical properties were investigated by tensile tests. Four probe technique was used for measurement of electrical conductivities. Morphological characterizations were made by SEM. Formation of PTP and its incorporation in PTP/MMT composite were confirmed by FTIR analysis. DSC results showed that PTP does not have any thermal transition in the range 25-300 0C. TGA results showed that PTP/MMT composites have outstanding stability compared to that of PTP. XRD analysis revealed the formation of nanocomposites resulting from intercalation of thiophene in MMT at high MMT contents. Composites were observed as globular particles and clusters in SEM studies. Conductivity values of PTP/MMT composites were in the order of 10-3 S/cm. It is observed that tensile modulus of PTP/PP composites increases by the addition of PTP, but percentage strain at break does not appreciably change. Increasing PTP content increased electrical conductivity.
Stromberg, Christian. "Transportprozesse bei der Bildung und Modifizierung technisch relevanter Polythiophene." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971958092.
Full textSantoso, Handoko Tirto. "Electrochemical processing of polythiophene films with enhanced structural order." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42696.
Full textSchneider, Mareike. "Polythiophene als sensitive Filme in chemischen Sensoren." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2002. http://nbn-resolving.de/urn:nbn:de:swb:14-1042708889359-42815.
Full textDie Arbeit befasst sich mit der Untersuchung von Polythiophenen, einer Gruppe der intrinsisch leitfähigen Polymere, für die Anwendung als sensitive Filme in chemischen Sensoren. Ziel war es dabei, ausgewählte Aspekte des Sensoreinsatzes dieser Polymere zu beleuchten, um Wege zu einer verbesserten Sensorcharakteristik solcher Systeme aufzuzeigen. Der erste Teil der Ergebnisse konzentriert sich auf den Einsatz von Poly(3,4-ethylendioxythiophen) in Sensoren für die Bestimmung von Ionenkonzentrationen in wässrigen Medien. Die elektrochemische Polymerisation auf Schwingquarzen und der potentialinduzierte Ionenaustausch an solchen Polymerfilmen wurden mit Hilfe der elektrochemischen Quarzmikrowaage charakterisiert. Diese beruht auf der Impedanzanalyse von Schwingquarzen in der Nähe ihrer Resonanzfrequenz, was neben der Erfassung der Änderung der Resonanzfrequenz der Quarze auch die Untersuchung des Dämpfungsverhaltens und somit eine halbquantitative Analyse der mechanischen Eigenschaften des Polymerfilmes ermöglicht. Aus den Daten Impedanzanalyse während der Polymerisation wurden mit einem neuen Berechnungsmodells, das viskoelastische und rauhigkeitsinduzierte Einflüsse berücksichtigt, die Polymermasse und vertikale und laterale Rauhigkeitsparameter bestimmt. Der Einfluss des Substituenten auf die Morphologie und das elektrochemische Verhalten in organischen Elektrolyten ist durch Vergleichsuntersuchungen an Poly(2,2?-bithiophen) illustriert. Die Sensormessungen erfolgten in wässrigen Modellelektrolyten mit unterschiedlich großen Anionen (LiClO4, NaClO4, NaNO3, Natriumtoluolsulfonat). Für die potentialabhängige Ionenaustauschreaktion konnte ein Einbau von Anionen bei der Oxidation des Polymers, der mit einem Ausstoß von Lösungsmittel verbunden war, nachgewiesen werden. Bei Reduktion des Polymers war der umgekehrte Vorgang zu beobachten. Kationen waren nicht nachweislich an den Austauschprozessen beteiligt. Als Sensorsignal wurde aus der bei Einbau der Ionen geflossenen Ladung und der reaktionsbedingten Masseänderung die ausgetauschte molare Masse und die inkorporierte Ionenmenge bestimmt. Die ausgetauschte molare Masse ergab für die unterschiedlichen Ionenspezies typische Werte, was eine Identifizierung der jeweiligen Analyten erlaubt. Die berechnete Analytmenge belegte eine erhöhte Empfindlichkeit für das in der Polymerisation verwendete Anion (Perchlorat) und eine geringe Empfindlichkeit für große Anionen (Toluolsulfonat) Für dünne, weniger poröse Filme war das Austauschverhältnis von Anion und Lösungsmittel annähernd proportional zu den Molekülgrößen der beteiligten Spezies. Ein zweiter Schwerpunkt der Arbeit war die Weiterentwicklung eines Verfahrens zur oxidativ?chemischen Abscheidung von Polythiophenfilmen unter Nutzung haftvermittelnder Substanzen. Dafür wurde die Filmqualität experimentell optimiert und Methoden zur strukturierten Abscheidung entwickelt. Zur Strukturierung der Polymerfilme wurden Methoden zur lokalen Aufbringung des Haftvermittlers auf Basis einer Maskierung des Substrates mit photostrukturierbaren Lackmasken bzw. auf Basis des Mikrokontaktdruckes der Haftvermittlerlösung entwickelt. Mit der Maskentechnik konnten Strukturen im Submikrometerbereich, mit dem Mikrokontaktdruck im Mikrometerbereich, erzielt werden. Der Nachweis der Sensitivität der chemisch polymerisierten Polythiophenfilme wurde für redoxaktive Gase mit Hilfe von Leitfähigkeitssensoren erbracht, und die Reaktionskinetik in Abhängigkeit von Feuchte und Temperatur untersucht
Seidler, N. "Polythiophene nanofibres for optoelectronic applications." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1456569/.
Full textGraves, Colin G. "Electrically conductive adhesives based on polythiophene." Thesis, Anglia Ruskin University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410803.
Full textSimmons, Martin Richard. "Processable forms of polypyrrole and polythiophene." Thesis, University of Sussex, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336326.
Full textWinkels, Stephan. "Polymerisation und Abscheidung von Kompositmaterialien aus kolloidaler Lösung." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=959856749.
Full textAllard, Dirk. "Strukturierte halbleitende Thiophene." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=96993811X.
Full textChirvase, Dana. "Electrical characterization of organic devices case study ; polythiophene-fullerene based solar cells /." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97400734X.
Full textLowe, Jimmy K. L. "Synthesis, properties, and photolithography of polythiophene derivatives." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0019/NQ37728.pdf.
Full textShuttle, Christopher G. "Recombination dynamics in polythiophene : fullerene solar cells." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/4652.
Full textAnjos, Tânia Gomes. "Electrochemical and spectroelectrochemical studies on polythiophene derivatives." Thesis, Bangor University, 2006. https://research.bangor.ac.uk/portal/en/theses/electrochemical-and-spectroelectrochemical-studies-on-polythiophene-derivatives(d0af607b-ec5f-4137-aa29-7791600b6815).html.
Full textBodenstedt, Kurt. "Synthesis and Electron Transfer Studies of Supramolecular Triads." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849639/.
Full textWilliams, Gwion Owain. "Conducting polymers for use in supercapacitors : an electrochemical and spectroelectrochemical investigation into low bandgap thiophene derivatives." Thesis, Bangor University, 1999. https://research.bangor.ac.uk/portal/en/theses/conducting-polymers-for-use-in-supercapacitors--an-electrochemical-and-spectroelectrochemical-investigation-into-low-bandgap-thiophene-derivatives(08b98553-6f0c-42ad-9d48-1fc6274f2bbd).html.
Full textHampton, Mark D. "Polythiophene nanowires for use in organic electronic applications." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/45399/.
Full textVijayakumar, Vishnu. "Highly oriented conducting polythiophene films for thermoelectric applications." Thesis, Strasbourg, 2020. http://www.theses.fr/2020STRAE004.
Full textThe aim of this thesis is to develop new polymeric thermoelectric (TE) materials based on oriented polythiophene (PBTTT) films. High-temperature rubbing produces oriented films of controlled orientation and crystallinity. Various doping methods with suitable dopants (F4TCNQ, F6TCNNQ and FeCl3) produced enhanced TE properties along the rubbing direction. A combination of polarized UV-Vis-NIR spectroscopy and TEM uncovered the amount and orientation of dopants intercalated in the crystals of PBTTT. The diffusion coefficient of dopants is correlated to the length of alkyl side chains : PBTTT with C12 side chains shows the best TE properties because of a fast and effective diffusion of dopants in the polymer films. Finally, we evaluated the impact of dopant (geometry, electronegativity) on the TE properties. Doping oriented PBTTT with FeCl3 helped reach record electrical conductivity of 2×105 S/cm and TE power factors of 1 mW/mK2
Putnam, Daniel. "Investigation of degradation in polythiophene-fullerene based solar cells." [Ames, Iowa : Iowa State University], 2010. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1476338.
Full textSarkar, Parantap. "The ceramidonine and perkin approaches to aromatic nanoribbons." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14555/document.
Full textGraphene nanoribbons (GNRs) are promising materials for organic electronics, as they bridge the gap betweensingle-stranded conjugated polymers and carbon nanotubes. Two different synthetic approaches to GNRs aredeveloped and evaluated. The first approach is based on the acid-promoted cyclisation of arylaminoanthraquinonesto ceramidonines. Tetraazaarenes with two ceramidonine units are obtained, but the approachis found to be appropriate only to such small systems. The second approach is based on the condensation ofarylacetic acids with arenecarboxaldehydes or arylglyoxylic acids, followed either by quinone-assistedoxidative cyclodehydrogenation or palladium-catalysed dehydrodebromination to yield carboxy-substitutedelongated arenes. The quinone-based variant is found to be limited to reactive substrates such as thiophenederivatives and offers the perspective of partially rigidified carboxy-substituted poly(arenodithiophenes). Thepalladium-based variant is found to be more general, opening the prospect of obtaining a variety of ribbontypestructures with tunable electronic properties
Oguz, Gulcan. "Pyrolysis Mass Spectrometric Analysis Of Copolymer Of Polyacrylonitrile And Polythiophene." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605057/index.pdf.
Full textevolution of HCN, monomer, low molecular weight oligomers due to random chain cleavages are followed by cyclization and dehydrogenation reactions yielding crosslinked and unsaturated segments. Pyrolysis of the treated polyacrylonitrile films indicated decrease in the yields of monomer and oligomers, and increase in the amount of products stabilized by cyclization reactions were detected. Polythiophene degrades in two steps
the loss of the dopant and degradation of polymer backbone. The evolution profiles of polythiophene based products from polythiophene/polyacrylonitrile showed nearly identical trends with those recorded during the pyrolysis of pure polythiophene. However, evolution of HCN and the degradation products due to the homolytic cleavages of the polymer backbone continued through out the pyrolysis indicating a significant increase in their production. Furthermore, the yield of thermal degradation products associated with decomposition of the unsaturated cyclic imine segments decreased. A careful analysis of the data pointed out presence of mixed dimers confirming copolymer formation. In the second part of this work, a poly(acrylonitrile-co-butadiene) sample involving monomer units having quite similar molecular weights have been analyzed to investigate the limits of the pyrolysis mass spectrometry technique. Pyrolysis of aged poly(acrylonitrile-co-butadiene) indicated oxidative degradation of the sample. Keywords: conducting copolymer, polyacrylonitrile, polythiophene, polybutadiene, direct pyrolysis mass spectrometry
OLINGA, EDSON THOMAS. "Synthese et etude de copolymeres comportant des sequences de polythiophene." Université Louis Pasteur (Strasbourg) (1971-2008), 1992. http://www.theses.fr/1992STR13192.
Full textDANESH, CAMERON DEAN. "SURFACTANT FORMULATIONS FOR WATER-BASED PROCESSING OF A POLYTHIOPHENE DERIVATIVE." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1058.
Full textEllinger, Stefan. "Neue Synthesestrategie zu alpha- und alpha,omega-substituierten Oligo- und Polythiophenen und deren Selbstorganisation." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:289-vts-57926.
Full textDalgakiran, Sibel. "Design and electrochemical characterizaton of novel functionalized polythiophene and polysiloxane derivatives." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42226.
Full textAk, Metin. "Synthesis Of Polythiophene And Polypyrrole Derivatives And Their Application In Electrochromic Devices." Phd thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12608070/index.pdf.
Full textelectrochromism&rdquo
. In recent years there has been a growing interest in application of conducting polymers in electrochromic devices. Thus, electrochromic properties of the synthesized conducting polymers were investigated by several methods like spectroelectrochemistry, kinetic and colorimetry studies. Spectroelectrochemistry experiments were performed in order to investigate key properties of conjugated polymers such as band gap, maximum absorption wavelength, the intergap states that appear upon doping and evolution of polaron and bipolaron bands. Switching time and optical contrast of the homopolymers and copolymers were evaluated via kinetic studies. Results implied the possible use of these materials in electrochromic devices due to their good electrochromic properties.
Fritsch, Martin [Verfasser]. "Polyfluorene und Polythiophene für das Umwickeln von einwandigen Kohlenstoff-Nanoröhren / Martin Fritsch." Wuppertal : Universitätsbibliothek Wuppertal, 2016. http://d-nb.info/1124474005/34.
Full textVarene, Erwan [Verfasser]. "Exciton and Polaron Dynamics in Thin Oligo- and Polythiophene Films / Erwan Varene." Berlin : Freie Universität Berlin, 2013. http://d-nb.info/1036872521/34.
Full textHeimonen, Johanna. "Synthesis of a polar conjugated polythiophene for 3D-printing of complex coacervates." Thesis, Linköpings universitet, Laboratoriet för organisk elektronik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-177396.
Full textExamensarbetet är utfört vid Institutionen för teknik och naturvetenskap (ITN) vid Tekniska fakulteten, Linköpings universitet
Marinelli, Martina <1991>. "New functional polythiophene based materials: fine-tuning of photovoltaic or chiroptical properties." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amsdottorato.unibo.it/9353/1/Marinelli_Martina_Tesi.pdf.
Full textZhang, Fapei. "Role of polythiophene- based interlayers from electrochemical processes on organic light-emitting diodes." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1075975979500-25235.
Full textTarkuc, Simge. "Synthesis And Characterization Of A New Soluble Polythiophene Derivative And Its Electrochromic Application." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607993/index.pdf.
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* transition, polaron, and bipolaron band formations, respectively. The spectroelectrochemical behavior of the P(PTP-co-EDOT) in comparison to those of the respective homopolymers revealed solid evidence of copolymerization based upon the differences in the spectral signatures. Switching time of the polymers was evaluated by kinetic studies upon measuring the percent transmittance (%T) at the maximum contrast point. As an application, absorption/transmission type electrochromic devices with ITO/homopolymer(copolymer)/gel electrolyte/PEDOT/ITO configuration was constructed, where homopolymer (copolymer) and PEDOT functioned as the anodically and the cathodically coloring layers, respectively. Spectroelectrochemistry, switching ability and open circuit memory of the devices were investigated. The results revealed that these devices have good switching times, reasonable contrasts and optical memories.
Zhang, Fapei. "Role of polythiophene- based interlayers from electrochemical processes on organic light-emitting diodes." Doctoral thesis, Technische Universität Dresden, 2003. https://tud.qucosa.de/id/qucosa%3A24300.
Full textRedeker, Neil. "MORPHOLOGY AND CONFORMATION OF POLYTHIOPHENE DERIVATIVES IN ANISOTROPIC CORE-SHELL NANOCOMPOSITES AND SOLUTION." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1144.
Full textDang, Xuan Dung. "Electrosynthesis and characterization of thin copolymer films based on pyrrole and thiophene derivatives." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1125491701029-31683.
Full textThe copolymerization has been studied as a new strategy to synthesize polymer materials by combining interesting properties of the respective homopolymers. In this dissertation, the work focused on the electrosynthesis and characterization of conducting copolymer films based on pyrrole and thiophene derivatives. A variety of electrochemical, spectroscopic and microscopic techniques such as cyclic voltammetry, electrochemical impedance and photoelectrochemical spectroscopy, electrospray ionization mass spectroscopy, solid state NMR and Raman spectroscopy, thermal analysis and scanning electron microscopy supported the formation of true copolymers of pyrrole with bithiophene and 3-methylthiophene with ethyl-3-thiophene acetate. The analytical results exhibited that random copolymers were produced rather than block copolymers. The electronic and structural characteristics of the copolymer films were intermediate between those of the respective homopolymers and they were dependent on the copolymer composition. In particular, the semiconducting parameters of the copolymer films of pyrrole and bithiophene such as flat band potential, band gap energy and charge carrier density shifted from those of polypyrrole to polybithiophene with increasing bithiophene content of the copolymer films. Such parameters were controlled precisely by alternating either the monomer ratio or the polymerization potential. In addition, the morphological and electronic properties of the functionalized polymers of ethyl-3-thiophene acetate were increased significantly by copolymerization with 3-methylthiophene. The obtained conducting copolymer films were able to be applied in the field of sensoric
Yang, Li. "Terephthalate-Functionalized Conducting Redox Polymers for Energy Storage Applications." Doctoral thesis, Uppsala universitet, Nanoteknologi och funktionella material, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-304628.
Full textClaus, Ron. "Ferrocenylsubstituierte Thiophene." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-82047.
Full textOzyurt, Funda. "Synthesis And Electrochromic Properties Of A Multichromic, Conducting, Soluble Polythiophene Derivative And Its Copolymer." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610630/index.pdf.
Full textvis spectrophotometer and cyclic voltammetry. The polymer revealed three distinctive colors upon doping which indicated that the polymer is multichromic. Tert-butyl group on the pendant phenyl rings and hexyl groups on thiophene enhanced the solution processability of the electrochromic polymer. The electrochemical and spectral properties of the chemically synthesized polymer were investigated via spray coating on ITO glass slides. Electrochemical copolymerization of 2,3-bis(4-tert-butylphenyl)-5,8-bis(4-hexylthiophen-2-yl) quinoxaline (HTQ) with 3,4-ethylenedioxythiophene(EDOT) was performed to fulfill a strategy in achieving fine-tuned electrochromic properties. The copolymer, P(HTQ-co-EDOT) was characterized via detailed studies of cyclic voltammetry and spectroelectrochemistry. Band gap (Eg) of the copolymer was calculated as 1.4 eV and showed 34 % optical contrast with switching times less than 1 second.
Ebadian, Soheil. "Design and fabrication of polythiophene-based organic photovoltaic devices on glass and plastic substrate." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/12120.
Full textLai, Kevin. "The synthesis of novel polythiophene and investigation of their physio-chemical and biosensor properties." Thesis, Kingston University, 2009. http://eprints.kingston.ac.uk/20419/.
Full textZhang, Rong. "Preparation, electroactive properties and field controlled microwave transmission of polythiophene based conducting polymer composites." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398610.
Full textBoufflet, Pierre. "Fluorination as a tool for controlling properties, molecular order and functionality of polythiophene derivatives." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/55242.
Full textMendez, James D. "Conjugated Polymer Networks and Nanocomposites." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1282841324.
Full textZacca-Fadous, Maria-José. "Synthèse des matériaux hybrides organiques-inorganiques pour l’application dans l’énergie et l’environnement." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS221/document.
Full textThe field of organic-inorganic hybrid materials takes much more importance day by day. This thesis project addresses the benefits of such materials and summarizes the materials used in two areas, energy and environment.Π-conjugated materials based on poly (3-hexylthiophene) (P3HT) and silica were synthesized and characterized. We showed that the organization obtained thanks to self-assembly of the alkylenes chains and during the sol-gel process promote a regioregular polymerization of thiophenes units.On the other hand, organized (mesoporous and lamellar) hybrid materials functionalized with amines or carboxylic acids groups were synthesized and characterized. By chemichal modifications zwitterionic materials were and used for ions extractions from water. The results show that the layered materials containig sodium ions are the most effective for the cations extraction. These same materials were tested as catalysts for epoxidation which opened several perspectives on the subject
Zessin, Johanna [Verfasser], Michael [Gutachter] Mertig, and Brigitte [Gutachter] Voit. "DNA Origami-Templated Synthesis of Semiconducting Polythiophene Filaments / Johanna Zessin ; Gutachter: Michael Mertig, Brigitte Voit." Dresden : Technische Universität Dresden, 2019. http://d-nb.info/1231847255/34.
Full textKiriy, Nataliya. "Thiophene Based Semiconductors: Synthesis and Characterizations." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1141840200043-85237.
Full textNambiar, Rakesh R. "Designing new architectures for controlling solid state properties of conjugated polymers." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33935.
Full textUnur, Ece. "Synthesis Of Thiophene Capped Polytetrahydrofuran Conducting Copolymers." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/4/1144625/index.pdf.
Full textHuang, Lung-Sheng, and 黃隆昇. "Synthesis of polythiophene with conductivity." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/qf42v5.
Full text國立臺北科技大學
有機高分子研究所
98
Polythiophene is an important polymer, which can be used as OLED, feed effect transition, and solar-cells. In this experiment, poly(3,4-ethylenedioxythiophene) is synthesized. Their physical propertise are investigated by FTIR, UV, and NMR. The thermal stability is improved by silane treatment. The reason for increasing the thermal stability is the crosslinking reation occurred after the silan freatments. On the other hand, the PEDOT conductivity is studied by changing the solvent, doping material. The structure properties relationships is elucidated in this study.
FANG, YI-CHIN, and 方怡欽. "The Optical Properties of Polythiophene Derivatives." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/46081947068728243848.
Full text國立高雄應用科技大學
化學工程與材料工程系博碩士班
101
In this study, the Halogen dance reaction was adopted convert 2,5 phase 3-hexylthiophene into 2,4 phase 3-hexylthiophene, then using the Suzuki coupling reaction and Kumada coupling reaction to allow 2,4 phase 3-hexylthiophene copolymerize with several aromatics (fluorene and EDOT…etc) to obtain three type polymer (PF24)、(P3HT24HT)、(PEDOT24HT) whose absorbance and emission characteristics of the polymer solution and film were measured. Charactered by 1H-NMR spectroscopy, the Halogen dance reaction was successfully performed. From UV-visible absorption spectrometer (UV-vis), we learned that absorption peaks went on red shift when polymer solution was dried and became film, From UV-visible absorption spectrometer (UV-vis) and Photoluminescence spectrometer(PL) mix spectra, we learned that 2,4 phase 3-hexylthiophene series polymer had better stokes shift than 2,5 phase 3-hexylthiophene series polymer. Charactered by Mass spectroscopy, 2,4 phase 3-hexylthiophene series polymer had low molecular weight. Charactered by thermal gravimetric analyzer(TGA), 2,4 phase 3-hexylthiophene series polymer had not better thermal stability.
Bondarev, Dmitrij. "Syntéza a charakterizace konjugovaných polymerů obsahujících fluorenové a thiofenové jednotky." Doctoral thesis, 2013. http://www.nusl.cz/ntk/nusl-322203.
Full text