Au Benedict Wen-Cheun, Chan Kah-Yoong, Sahdan Mohd Zainizan, Chong Abraham Shiau-Iun, Knipp Dietmar
Faculty of Engineering, Multimedia University, Cyberjaya, Selangor, 63100, Malaysia.
Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, Batu Pahat, Johor, 86400, Malaysia.
F1000Res. 2022 Mar 31;11:380. doi: 10.12688/f1000research.73661.2. eCollection 2022.
: In the last decade, there has been much interest in the area of solid polymer electrolyte (SPE) to address the issues of electrolyte leakage and evaporation in electrochromic devices (ECD). ECD is a state-of-the-art technology having the ability to change from transparent state to opaque state under the influence of a small applied voltage for energy saving applications. In this work, tungsten oxide (WO ) films were fabricated via the sol-gel spin-coating method. Subsequently, ECDs were assembled based on SPE and liquid polymer electrolyte (LPE), respectively using indium doped tin oxide (ITO) coated glass as conducting electrodes and WO films as working electrode. Cyclic voltammetry (CV) results revealed reduced ionic conductivity of conducting ions in SPE based ECD (SECD) owing to increased viscosity by addition of PMMA. However, lesser time was required for the colouration process. LPE based ECD (LECD) showed higher colouration efficiency (CE) compared to its SECD counterpart. This is attributed to its larger optical modulation. This work presents a comparison between the performance of LECD and SECD in terms of electrochromic (EC) and optical properties. They were analysed through CV, chronoamperometry (CA) and ultraviolet-visible (UV-Vis) spectrophotometer. Furthermore, this work provides an insight on the employment of solid-state electrolytes in ECDs in view of the persistent leakage and evaporation problems in ECD implementation.
在过去十年中，固态聚合物电解质（SPE）领域备受关注，以解决电致变色器件（ECD）中的电解质泄漏和蒸发问题。ECD是一种先进技术，能够在施加小电压的影响下从透明状态转变为不透明状态，用于节能应用。在这项工作中，通过溶胶 - 凝胶旋涂法制备了氧化钨（WO ）薄膜。随后，分别以掺铟锡氧化物（ITO）涂覆的玻璃作为导电电极，以WO 薄膜作为工作电极，基于SPE和液体聚合物电解质（LPE）组装了ECD。循环伏安法（CV）结果表明，由于添加PMMA导致粘度增加，基于SPE的ECD（SECD）中导电离子的离子电导率降低。然而，显色过程所需时间较短。基于LPE的ECD（LECD）与其对应的SECD相比显示出更高的显色效率（CE）。这归因于其更大的光学调制。这项工作在电致变色（EC）和光学性质方面对LECD和SECD的性能进行了比较。通过CV、计时电流法（CA）和紫外 - 可见（UV - Vis）分光光度计对它们进行了分析。此外，鉴于ECD实施中持续存在的泄漏和蒸发问题，这项工作为固态电解质在ECD中的应用提供了见解。
