Narrow-bandgap polythiophene derivatives

Scheme 15.3 Structures of narrow-bandgap polythiophene derivatives [16, 22, 43]...

Scheme 15.4 Structures of narrow-bandgap polythiophene derivatives cyclopenta[2,1-b 3,4-bf Jdithiophene-4-one (CDT) and dithieno[3,4-b 3, 4 -d]thiophene (DTTI)...

This chapter focuses on the use of polythiophene derivatives [11] as active electrode materials in electrochemical capacitors. First, the concept of electrochemical capacitors is presented in order to highlight the electrochemical properties of polythiophenes that make them suitable for this application. Second, the various wide- and narrow-bandgap derivatives of polythiophenes that have been investigated are discussed. 

A survey of the polythiophene derivatives that have been considered and tested as active electrode material in electrochemical capacitors can be roughly divided between wide- and narrow-bandgap derivatives. The structure of monomers of the corresponding polymers is presented in Schemes 15.1-15.4. 

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