A methodology is presented to develop tungsten-oxide based inks for screen-printing. Different amounts of tungsten oxide have been grown by co-precipitation on the surface of conducting microparticles. These modified particles have been formulated into inks, and electrodes have been screen-printed. The work describes the characterization of the materials using a range of techniques including XRD, SEM, as well as electrochemical and spectroscopic techniques. Thermal treatment of the co-precipited oxides changes their crystalline structure, increasing bandgap (from 2.48 eV to 2.87 eV) and worsening their electrochromic performance. Structures printed with untreated WO-based materials display contrast ratios as high as 90 % in reflectance, and colour efficiencies between 30 and 40 cm C. Another important aspect is the pH stability of the oxide up to pH = 6.

中文翻译：

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电致变色丝网印刷三氧化钨电极


提出了一种开发用于丝网印刷的氧化钨基油墨的方法。通过共沉淀在导电微粒的表面生长了不同量的氧化钨。这些改性颗粒已被配制为墨水，并且电极已被丝网印刷。这项工作描述了使用一系列技术（包括 XRD、SEM 以及电化学和光谱技术）对材料进行表征。共沉淀氧化物的热处理改变了它们的晶体结构，增加了带隙（从 2.48 eV 到 2.87 eV）并恶化了它们的电致变色性能。使用未经处理的 WO 基材料打印的结构显示出高达 90% 的反射对比度，以及 30 至 40 cm C 之间的色彩效率。另一个重要方面是氧化物的 pH 稳定性高达 pH = 6。