Electrochromism and Electrofluorochromism based on Viologen Derivative with 1,10-Phenanthroline Moiety for Multicolor Large-Area and Patterned Display,Advanced Materials Technologies

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Electrochromism and Electrofluorochromism based on Viologen Derivative with 1,10-Phenanthroline Moiety for Multicolor Large-Area and Patterned Display
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2023-09-19 , DOI: 10.1002/admt.202301092
Yanling Zhuang ₁ , Jianming Li ₁ , Mingye Zhu ₂ , Feiyang Li ₃ , Shujuan Liu ₂ , Qiang Zhao _{1,

2}

Affiliation

Viologens, a typical group of electrochromic materials, show rich color changes under the external electrical stimulus. Recently, some of the viologen derivatives are reported to exhibit good luminescent performance. However, their luminescence colors are difficult to adjust owing to the strong electron-accepting properties of viologens, which seriously hinders their applications in smart light-emitting devices. In this work, the color/emission dual-switchable viologen derivative Phen-vio is designed and synthesized by introducing fluorophore 1,10-phenanthroline into 4,4′-bipyridine, for multicolor large-area and patterned electrochromic/electrofluorochromic devices. Under voltage driving of −2.3 and −2.8 V, the devices exhibited reversible color and fluorescence color changes from light yellow to dark orange to dark blue, and from yellow to orange to green, respectively. Moreover, the devices displayed a high color contrast ratio of up to 77% at 600 nm. More importantly, the driving voltages of the devices do not vary with the change of the device area, which is huge application potential in smart windows and tags.

中文翻译：

基于具有 1,10-菲咯啉部分的紫精衍生物的电致变色和电荧光致变色用于多色大面积和图案显示

紫罗碱是一类典型的电致变色材料，在外部电刺激下表现出丰富的颜色变化。最近，据报道一些紫罗碱衍生物表现出良好的发光性能。然而，由于紫精强的电子接受特性，其发光颜色难以调节，严重阻碍了其在智能发光器件中的应用。本工作通过将荧光团1,10-菲咯啉引入到4,4'-联吡啶中，设计合成了颜色/发射双切换紫精衍生物Phen-vio，用于多色大面积和图案化电致变色/电荧光致变色器件。在-2.3和-2.8 V的电压驱动下，器件表现出可逆的颜色和荧光颜色变化，分别从浅黄色到深橙色到深蓝色，以及从黄色到橙色到绿色。此外，这些设备在 600 nm 处表现出高达 77% 的高色彩对比度。更重要的是，器件的驱动电压不随器件面积的变化而变化，这在智能窗和标签中具有巨大的应用潜力。

更新日期：2023-09-19

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