三氯化铈掺杂聚苯胺电致变色器件的制备与表征

利用恒电位法在ITO导电玻璃表面制备了三氯化铈掺杂聚苯胺薄膜,该薄膜比未掺杂三氯化铈的薄膜更加光滑致密、附着力更好,用该薄膜组装成了电致变色器件,器件具有深蓝色–蓝色–蓝绿色–黄绿色–浅黄色的颜色变化。     

WO3电变色材料的氢化技术研究

全固态电变色器件制作工艺复杂,氢化（或锂化）工艺是制备WO3电变色器件的关键技术。本文主要论述氢化工艺的制备方法、工艺过程及实验结果等。     

纳米WO3薄膜的制备方法及其研究现状

综述了纳米ＷＯ３薄膜的各种制备方法,评价了其优缺点,对纳米ＷＯ３的研究和应用现状作了简概述,并提出了纳米ＷＯ３薄膜的发展前景。     

掺杂PEO的WO3电致变色薄膜的研究

通过沈胶－凝胶方法,采用正交设计研究制备出了掺杂PEO的WO3电致变色薄膜,并利用电化学循环伏安装置、分光光度计、X－Ray衍射进行了相关的性能测试,指出掺杂一定量的PEO可使氧化钨薄膜离子、电子传导率加快,薄膜响应速度加快,同时也使薄膜的变色性能提高。     

4,4’-联苯二甲酸酯类化合物的电致变色性能及器件

以联苯为原料合成了6种4,4’-联苯二甲酸酯类化合物,通过核磁、红外对其结构进行了确认,并使用电化学工作站和紫外光谱对其电化学性质作了初步研究。组装了以4,4’-联苯二甲酸酯为电致变色材料的简易EC器件,当施加3.0V电压时器件显示黄绿色,而施加3.6V电压时显示为洋红色,实现了从无色到三原色的转变。而且,4,4’-联苯二甲酸酯合成操作简单,成本低廉,是一类新型的电致变色材料。     

Visualization Recording and Storage of Pressure Distribution through a Smart Matrix Based on the Piezotronic Effect

Pressure sensors that can both directly visualize and record applied pressure/stress are essential for e‐skin and medical/health monitoring. Here, using a WO₃‐film electrochromic device (ECD) array (10 × 10 pixels) and a ZnO‐nanowire‐matrix pressure sensor (ZPS), a pressure visualization and recording (PVR) system with a spatial resolution of 500 µm is developed. The distribution of external pressures can be recorded through the piezotronic effect from the ZPS and directly expressed by color changes in the ECD. Applying a local pressure can generate piezoelectric polarization charges at the two ends of the ZnO nanowires, which leads to the tuning of the current to be transported through the system and thus the color of the WO₃ film. The coloration and bleaching process in the ECD component show good cyclic stability, and over 85% of the color contrast is maintained after 300 cycles. In this PVR system, the applied pressure can be recorded without the assistance of a computer because of the color memory effect of the WO₃ material. Such systems are promising for applications in human‐electronic interfaces, military applications, and smart robots.     

Reflecting electrochromic devices

Unstructured all-solid-state thin-film electrochromic devices (ASTFEDs) with variable reflectance have been developed on the basis of hydrogen-tungsten bronzes. The characteristic compounds of these systems are a transparent electrode (ITO), an electrochromic WO₃-layer, solid-state ion-conducting layers (‘electrolytes’), an integrated reflecting layer, and a hydrogen-storing layer. The total thickness of such structures is only a few microns. They are enclosed between the substrate glass and a second glass plate and are thus protected from the environment. Different modes of construction are presented and compared, the electrochemistry of the thin-layer cells is discussed, the tasks and characteristics of the thin-film arrangements and their important features are shown, and possible applications are briefly described.     

溅射氧化镍薄膜的电致变色特性

本文采用直流反应溅射获得了具有良好电色特性的ＮｉＯｘ薄膜。薄膜的电色特性强烈地受到制备条件的影响，在低溅射电压和高溅射压力下制得的薄膜电色效果最佳。典型的ＮｉＯｘ电色薄膜厚２００ｎｍ，可见光透过率变化范围在６３２．８ｎｍ处可达４８％，着色及退色响应时间为５～１０ｓ。Ｘ射线衍射表明薄膜呈非晶态。ＸＰＳ显示Ｎｉ￣（３＋）在电色过程中起着色心作用。红外反射谱证实电色过程有ＯＨ基的参与。