Electrochromic and photovoltaic applications of benzotriazole bearing donor acceptor type conjugated polymers

Download

index.pdf

Date

2010

Author

Baran, Derya

Metadata

Show full item record

Item Usage Stats

281
views

92
downloads

Organic semi-conductors are of great interest since these compounds can be utilized as active layers in many device applications such as ECDs, LEDs and solar cells. Incorporating the benzotriazole units into the polymer backbone enhances the optical properties of donor units. Hexyl thiophene and pyrrole are commonly used as electron donor materials. Benzotriazole can be coupled to hexyl thiophene or pyrrole to yield materials which can be polymerized to give donor acceptor type polymers. These materials are promising components in fast switching polymeric electrochromic devices and highly efficient photovoltaic devices. During thesis studies,poly(2-dodecyl-4,7-bis(4-hexylthiophen-2-yl)-2H-benzo[d][1,2,3]triazole) (PHTBT) and poly(2-dodecyl-4,7-di(1H-pyrrol-2-yl)- 2H- benzo [d] [1,2,3] triazole) (PPyBT) will be synthesized via N-alkylation, bromination, stannylation and Stille coupling reactions. Electrochromic and photovoltaic properties of the polymers will be investigated in detail.

Subject Keywords

Chemistry.

URI

http://etd.lib.metu.edu.tr/upload/2/12611593/index.pdf
https://hdl.handle.net/11511/19384

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Flexible organic photovoltaics from zinc oxide nanowires grown on transparent and conducting single walled carbon nanotube thin films Ünalan, Hüsnü Emrah; Kuo, Daniel; Parekh, Bhavin; Amaratunga, Gehan; Chhowalla, Manish (Royal Society of Chemistry (RSC), 2008-01-01) The fabrication of flexible organic photovoltaics (OPVs) which utilize transparent and conducting single walled carbon nanotube (SWNT) thin films as current collecting electrodes on plastic substrates in zinc oxide nanowire (ZnO NW)/poly(3-hexylthiophene) (P3HT) bulk heterojunction photovoltaic devices is reported. The bulk heterojunctions for exciton dissociation are created by directly growing ZnO nanowires from solution on the SWNT electrodes and spin coating the P3HT polymer. A maximum OPV power convers...
A new NIR absorbing DPP-based polymer for thick organic solar cells Oklem, Gulce; Song, Xin; Toppare, Levent Kamil; Baran, Derya; Günbaş, Emrullah Görkem (Royal Society of Chemistry (RSC), 2018-03-28) Sunlight covers a broad spectrum from ultra-violet to infrared, and low band gap materials are required to utilize the near infrared region (NIR) for better photon harvesting in organic solar cells. It has been shown that copolymers comprising diketopyrrolopyrrole-based acceptors and simple donors (thiophene or furan) achieve an absorption maximum at around 800 nm. In this study, selenophene was coupled with a diketopyrrolopyrrole based acceptor to yield a polymer (PFDPPSe) with an absorption maximum at 830...
Preparation and characterization of magnetic nanoparticles Küçük, Burcu; Volkan, Mürvet; Department of Chemistry (2009) Magnetite (Fe3O4) and Maghemite (γ-Fe2O3) are well-known iron oxide phases among magnetic nanoparticles due to their magnetic properties, chemical stability, and nontoxicity. They have gained acceptance in several fields of application of nanomaterials such as magnetic recording systems, magnetic refrigeration, magneto-optical devices, magnetic resonance imaging, magnetic separation techniques and separation and purification of biological molecules. Recently, there is a growing interest in the synthesis of ...
A theoretical mechanistic study on electrical conductivity enhancement of DMSO treated PEDOT:PSS Yıldırım, Erol; Yong, Xue; Tan, Teck Leong; Zhu, Qiang; Xu, Jianwei; Ouyang, Jianyong; Wang, Jian-Sheng; Yang, Shuo-Wang (Royal Society of Chemistry (RSC), 2018-05-21) Conductive polymers have been attracting attention for decades due to their promising applications in photovoltaic cells and thermoelectrics. Among them, poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is the most extensively studied one with the features of high water dispersibility, transparency and thermal stability as well as having relatively high electrical conductivity (EC). Nevertheless, the EC of as-prepared PEDOT:PSS is still unsatisfactory for real applications. Experimental...
Electrochromic performance and ion sensitivity of a terthienyl based fluorescent polymer Atilgan, Nurdan; CİHANER, ATİLLA; Önal, Ahmet Muhtar (Elsevier BV, 2010-04-01) A novel terthienyl based fluorescent polymer bearing strong electron-withdrawing substituents directly attached to the 3,4-positions of the central thiophene ring was synthesized by electrochemical polymerization of diethyl 2,5-di(3,4-ethylenedioxythiophen-2-yl)thiophene-3,4-dicarboxylate. The corresponding polymer was characterized by cyclic voltammetry, FT-IR and UV-vis spectroscopy. The polymer has a well-defined redox process (E-p,E-1/2 = 0.74 V) and demonstrates a reversible electrochromic behavior; li...

Citation Formats

D. Baran, “Electrochromic and photovoltaic applications of benzotriazole bearing donor acceptor type conjugated polymers,” M.S. - Master of Science, Middle East Technical University, 2010.