A new green-to-transmissive polymer with electroactive poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) as an interface layer for achieving high-performance electrochromic device |
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| Authors: | Xiaojing Lv Qian Bi Alexey Tameev Yujian Zhang Liang Qian Mi Ouyang Cheng Zhang |
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| Institution: | 1. International Science and Technology Cooperation Base of Energy Materials and Application, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, People's Republic of China;2. The Laboratory for Electronic and Photonic Processes in Polymer Nanomaterials, A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences, Moscow, Russia;3. Department of Materials Chemistry, Huzhou University, Huzhou, People's Republic of China |
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| Abstract: | A new neutral green electrochromic (EC) polymer, namely poly(5,8-bis(2,3-dihydro3,4-B]1,4]dioxin-5-yl)-2,3-dual(4-(hexadecyloxy) phenyl) quinoxaline) (PBOPEQ) was designed and synthesized. PBOPEQ-poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) film was further prepared by electrochemical polymerization on the PEDOT:PSS modified indium tin oxide (ITO) electrode. Scanning electron microscopy images and ultrasonic experiment indicate that PBOPEQ-PEDOT:PSS film shows better film-forming ability and stronger interface adhesive with ITO electrode compared to that of PBOPEQ film. It is worth mentioning that PBOPEQ-PEDOT:PSS film presents more reversible redox characteristic, better optical contrast (~40%) and coloration efficiency (~230 cm2 C−1) at 678 nm, excellent EC stability and memory property (36 hr), which should be ascribed to that the electroactive PEDOT:PSS layer facilitates the charge transfer process and enhances the ion doping/dedoping properties. EC device based on PBOPEQ-PEDOT:PSS film exhibits superior integrated performance such as reversible color change from green to transmissive, optical contrast of 41.0% and switching time less than 1 s. Accordingly, PBOPEQ-PEDOT:PSS is an excellent EC material when combined with electroactive PEDOT:PSS interface layer for achieving high performance device, which shows potential applications in displays, electronic papers, and tags. |
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| Keywords: | conjugated polymer electrochromism interface modification PEDOT:PSS quinoxaline |
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