Fully biodegradable electrochromic display for disposable patch

IF 12.3 1区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Se-Hun Kang, Ju-Yong Lee, Joo-Hyeon Park, Sung-Geun Choi, Sang-Ho Oh, Young-Chang Joo, Seung-Kyun Kang
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Abstract

Flexible and biodegradable electronics have emerged as a promising solution for escalating electronic waste issue caused by the rapid development of skin patch electronics. Fully biodegradable displays are essential for visualizing biological/physical/chemical/electrochemical signals measured by a wide range of skin patch electronics. Here we propose fully biodegradable electrochromic display providing low operating voltage and low power consumption. The biodegradable transparent conductive electrode was fabricated by transferring free-standing tungsten nanomesh onto poly lactic-co-glycolic acid substrate using electrospinning templating, minimizing damage to the substrate. Electrochromic layer was tungsten oxide which is biodegradable, and a ferrocyanide/ferricyanide redox agent was utilized as a counter electrode reaction to enhance operational stability in an aqueous electrolyte by reducing operating voltage and side reactions. This display successfully visualized diverse signals from various biodegradable electronics such as UV sensors and electrochemical transistors, and finally underwent eco-friendly degradation in phosphate-buffered saline or soil under mild conditions.

Abstract Image

Abstract Image

用于一次性贴片的完全可生物降解的电致变色显示屏
随着皮肤贴片电子设备的快速发展,柔性可生物降解电子设备已成为解决日益严重的电子垃圾问题的一种可行方案。完全可生物降解的显示屏对于可视化各种皮肤贴片电子设备测量到的生物/物理/化学/电化学信号至关重要。在此,我们提出了可完全生物降解的电致变色显示屏,它具有低工作电压和低功耗的特点。这种可生物降解的透明导电电极是利用电纺丝模板将独立的钨纳米网转移到聚乳酸-共聚乙酸基底上制成的,从而最大限度地减少了对基底的损害。电致变色层是可生物降解的氧化钨,并使用了亚铁氰化物/铁氰化物氧化还原剂作为反电极反应,通过降低工作电压和副反应来增强在水性电解质中的工作稳定性。这种显示屏成功地将紫外线传感器和电化学晶体管等各种可生物降解电子器件发出的各种信号可视化,并最终在磷酸盐缓冲盐水或土壤中进行了温和条件下的生态友好降解。
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来源期刊
CiteScore
17.10
自引率
4.80%
发文量
91
审稿时长
6 weeks
期刊介绍: npj Flexible Electronics is an online-only and open access journal, which publishes high-quality papers related to flexible electronic systems, including plastic electronics and emerging materials, new device design and fabrication technologies, and applications.
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