Development of P and N type donor acceptor conjugated polymers for electrochromic and organic solar cell applications /

Date

2015

Author

Akbaşoğlu Ünlü, Naime

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Donor-acceptor (D-A) approach is highly efficient to obtain p-type and n-type materials with desired intrinsic optical and electrochemical properties. Therefore, in this study a series of p-type and n- type DA type conjugated polymers was synthesized with combination of electron donating and electron-withdrawing heterocyclics to understand the effects of structural modifications on electrochemical, optoelectronic and photovoltaic properties. Synthesized polymers were utilized for electrochromic and organic solar cell applications. Conjugated polymers were synthesized either electrochemical or chemical methods. Syntheses of p-type DA polymers were performed vi from the coupling reaction of benzotriazole with different donor units, i.e, furan, thieno[3,2-b]thiophene, dithienopyrrole, benzodithiophene. Donor units in molecular design are either used directly to couple with BTz or inserted as π-bridging segments to discuss their effect on optical, electrochemical, electrochromic, and optoelectronic properties. N-type conjugated polymers were developed by NDI and ladder type indacenodithiophene (IDT) and indacenodiselenophene (IDSe) units. N-type conjugated polymers were utilized for all polymer solar cell applications to replace fullerene in bulk heterojunction organic solar cell fabrication. Morphological and light intensity dependent photovoltaic studies were conducted that elucidate the possible loss mechanism in the related solar cells.

Subject Keywords

Electrochromic devices., Electrooptical devices., Conjugated polymers., Conducting polymers., Solar cells.

URI

http://etd.lib.metu.edu.tr/upload/12619259/index.pdf
https://hdl.handle.net/11511/25180

Collections

Graduate School of Natural and Applied Sciences, Thesis