Syntheses of new multifunctional donor acceptor type polymers for electrochromic and organic solar cell applications /

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2016

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Özdemir Hacıoğlu, Şerife

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Combining donor and acceptor moieties in the polymer backbone enhances D–A interactions and helps in developing the most efficient polymers for various applications. Besides obtaining low band gap polymers, the D–A approach is also useful in producing polymers with improved optical, mechanical and electronic properties. Changing both or either of the donor/acceptor groups is an effective method to design these alternating systems. For this purpose different acceptors units such as; benzothiodiazole, benzotriazole, quinoxaline and benzimidazole were coupled with different donor units but the desired properties could not be combined up to now. In this thesis firstly it is aimed to design a new acceptor unit which is the combination of benzotriazole and quinoxaline units (triazoloquinoxaline unit). After synthesis of this new acceptor unit, it was coupled with donor units and electrochemical and spectroelectrochemical characterization were performed. Furthermore affect of π bridge on electrochemical behaviors were also investigated via synthesizing benzotriazole and triphenylamine bearing random copolymers. Cyclic Voltammetry (CV) and UV–Vis-NIR spectrohotometer were used to investigate electrochemical behaviors of the the monomers and conducting polymers. Finally while triazoloquinoxaline derivatives were used for electrochromic device applications, triphenylamine bearing copolymers were used for organic solar cell applications as donor materials.

Subject Keywords

Solar cells., Benzotriazole., Triphenylamine., Conducting polymers., Electrochromic devices.

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http://etd.lib.metu.edu.tr/upload/12620372/index.pdf
https://hdl.handle.net/11511/26117

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Ş. Özdemir Hacıoğlu, “Syntheses of new multifunctional donor acceptor type polymers for electrochromic and organic solar cell applications /,” Ph.D. - Doctoral Program, Middle East Technical University, 2016.