Electrofluorochromic devices with organic dyes and conjugated polymers

Electrofluorochromic materials exhibit reversible switch of fluorescence emission by the applied potentials. This unique property is based on the electrochemistry of organic materials. Especially, electrofluorochromic organic dyes and conjugated polymers can be categorized into three types, depending on the distance between the electroactive moiety and the fluorescent core. The electrofluorochromic properties such as working potential, emission color, ON/OFF ratio, stability, and switching efficiency are summarized for each type of material. Also, the working principle of each type is introduced with suitable examples. Finally, some applications of electrofluorochromic materials are presented in the last part of this chapter. Although the reports on applications are still scarce until now, we believe that challenges in display or sensing applications will follow these pioneering researches.