A facile preparation of SiO 2 /PEDOT core/shell nanoparticle composite film for electrochromic device
- PDF / 6,712,280 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 47 Downloads / 181 Views
A facile preparation of SiO2/PEDOT core/shell nanoparticle composite film for electrochromic device Sihang Zhang1 · Sheng Chen2 · Feng Yang1 · Fei Hu2 · Yinghui Zhao2 · Bin Yan2 · Hao Jiang3 · Ya Cao1 Received: 8 October 2018 / Accepted: 3 January 2019 © Springer Science+Business Media, LLC, part of Springer Nature 2019
Abstract In this paper, we report an electrochromic device (ECD) using novel silica/ poly(3,4-ethylenedioxythiophene) (SiO2/PEDOT) core/shell nanoparticle film as electrode. The S iO2/PEDOT core/shell nanocomposite film was prepared by a facile in situ chemical oxidative polymerization method. Compared with the pure PEDOT film, the S iO2/PEDOT nanocomposite film exhibits shorter response time (1.8 s for bleaching and 1.4 s for coloring), higher coloration efficiency (247.6 cm 2/C) and better cycling stability (sustaining 81.8% of its initial optical contrast after switching 5000 s). The improved electrochromic performances are attributed to the core/shell nanostructures, which can make ion diffusion easier and provide larger surface area for charge-transfer reactions. Moreover, the ECD based on S iO2/PEDOT film also exhibits good electrochromic performances and has potential applications in smart windows, automobile anti-glare rearview mirrors and energy saving displays.
1 Introduction Electrochromism is a reversible optical change in materials upon redox reaction in the presence of external potential [1, 2]. Electrochromic material is utilized to construct electrochromic device (ECD) by assembling a simple sandwichlike configuration [3]. ECD has been widely researched for potential applications in smart windows, electrochromic displays, anti-glare rearview mirrors and military camouflage [4–6], since they possess a variety of advantages, including stable memory effect under open circuit conditions, low power consumption and tunable color depth [7–9]. The main classes of electrochromic materials are: the metal oxides, metal coordination complexes, metal hexacyano metallates and conjugated conducting polymer [10]. * Sheng Chen [email protected] * Ya Cao [email protected] 1
State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
2
Functional Polymer Materials Laboratory, College of Light Industry, Textile and Food Engineering, Sichuan University, Chengdu 610065, China
3
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
Electrochromism was first reported on inorganic oxides films such as tungsten trioxide(WO3) and iridium dioxide(IrO2) by Deb in 1969 [11]. Inorganic metal oxides have been widely used for electrochromic applications in the last several decades. However, the inorganic electrochromic materials suffer from processing, compatibility and performance problems [12]. More recently, conducting polymers have been extensively used for their excellent properties owing to high optical modulation, fast response speed, multiple color possibilit
Data Loading...
