Synthesis, electrochemical characterization and organic solar cell applications of selenophene containing conjugated polymers

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Fen Edebiyat Fakültesi, Kimya Bölümü, Türkiye

Tezin Onay Tarihi: 2017

Öğrenci: MUSTAFA YAŞA

Danışman: LEVENT KAMİL TOPPARE

Özet:

Donor-Acceptor (D-A) type conjugated polymers are very popular for potential applications such as organic light emitting diodes, solar cells, electrochromic devices and organic field effect transistors. In literature, cyclopentadithiophene and its derivatives are commonly used electron donor units for organic solar cells. The incorporation of selenium atom into polymer backbone results in low band gap polymers as compared to sulfur and oxygen counterparts. In this study, selenophene containing conjugated polymers were synthesized via Suzuki and Stille polycondensation reactions. Polymers were used as active layers for organic solar cells. Electrochemical and spectroelectrochemical characterizations and also organic solar cell application of these polymers were performed. For the structural analysis, Nuclear Magnetic Resonance Spectroscopy (NMR) and Gel Permeation Chromatography (GPC) techniques were used. Cyclic voltammetry (CV) were used to determine electrochemical properties of the polymers. The I-V characteristics of cells were investigated under AM 1.5 G illuminations. The effects of thermal and solvent annealing on morphology were also determined.