Electrochemical and electrochromic properties of diketopyrrolopyrrole-based conjugated polymer

- Films of polymer show highly stable and reversible electrochemical performances.
- Green/transparent switching can be achieved readily.
- The polymer films have a fast response time and high coloration efficiency.

We demonstrate novel high-performance electrochromic polymer (LGC-D148) films which contain a diketopyrrolopyrrole (DPP) as the acceptor and thiophene with 2,5-difluorophenylene-dithiophene as the donor. The polymer films undergo highly reversible and long-term stable electrochemical reactions and exhibit distinctive redox peaks. In situ optical measurements reveal that the LGC-D148 films have green/transparent electrochromism with a fast switching speed and a coloration efficiency of > 900 cm2/C.

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