IMPROVING THE OPTOELECTRONIC PROPERTIES OF CONDUCTING POLYMER VIA POLYOXOMETALATE

A composite film formed by combining the polyoxometalate and the conducting polymer can contribute greatly to the improvement of the optoelectronic properties of the conducting polymers thanks to the strong electrostatic interaction between them. In the present work, CT, namely 2,4,6-tris((9H-carbazol-2-yl)oxy)-s-triazine has been synthesized from one step reaction of s-triazine and 2-hydroxycarbazole. The electropolymerization of POM/CT was carried out onto ITO-glass surface in 0.1 M tetrabutylammonium hexafluorophosphate (TBAPF 6 )/acetonitrile (ACN) solution. The composite film displays enhanced electrochromic performance by incorporation of POM into the PCT film. The electrochromic and electrochemical property of the composite film is significantly improved, which results in an optical contrast of 59% at 670 nm and stability maintain 91% of its initial electroactivity at the end of the 300 cycles. These results indicate the important role of POMs in improving optoelectronic properties of PCT to expand  application  of electrochromic devices.