Systematic studies of side chains on optoelectronic properties of 3,4-dioxythiophene-based polymers

Electrochromic;Dioxythiophene;Side chains

Ochieng, Melony Achieng ; Reynolds, John R. Chemistry and Biochemistry Wilkinson, Angus P. Barefield, E. Kent Tsukruk, Vladimir El-Sayed, Mostafa ; Reynolds, John R.

University:Georgia Institute of Technology

Department:Chemistry and Biochemistry

关键词: Electrochromic;    Dioxythiophene;    Side chains;   

Others  :  https://smartech.gatech.edu/bitstream/1853/62667/1/OCHIENG-DISSERTATION-2019.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

In the past three decades, solution-processable cathodically coloring π-conjugated polymers, specifically those based on dioxythiophene (XDOT), have received significant attention as an active layer in electrochromic devices (ECDs), due to their facile chemical modification, low oxidation potentials, high optical contrast, and solution processability. While a lot of research has focused on the conjugate backbone very few studies have focused on understanding the effects of side chains on optoelectronic properties. Thus, systematic investigations into the effects of side chains on the optoelectronic properties of electrochromic polymers are needed. In this dissertation, a series of XDOT polymers with varying side chains are synthesized and the changes in redox nd optoelectronic properties are correlated to side chain functionality. Specifically, this dissertation highlights how side chains affect solubility, optical gap/color, ionization potential, electrochromic contrast, switching speeds, and switching stability when alkyl or oligoether side chains are attached to an XDOT backbone. Furthermore, new design guidelines for future materials and the challenges in establishing structure-prosperity relationships in XDOTs are presented.