In the past decades, various alternating current electroluminescent (ACEL) devices, especially the flexible ones, have been developed and used in flat panel display, large-scale decorating, logo display lighting, optical signaling, etc. Transparent plastics are usually used as substrates in ACEL devices; however, they are undegradable and may cause serious environmental pollution. Herein, we have developed a flexible transient ACEL device based on transparent fish gelatin (FG) films. The FG films were made from fish scales, which are sustainable, cost-efficient, and eco-friendly. These films could dissolve in water within seconds at 60 °C and degrade completely within 24 days in soil. The transmittance of these FG films was up to 91.1% in the visible spectrum, comparable to that of polyethylene terephthalate (PET) (90.4%). After forming a composite with silver nanowires (Ag NWs), the Ag NWs-FG film showed a transmittance up to 82.3% and a sheet resistance down to 22.4 Ω sq-1. The fabricated ACEL device based on the Ag NWs-FG film exhibited high flexibility and luminance up to 56.0 cd m-2. The device could be dissolved in water within 3 min. Our work demonstrates that the sustainable, flexible, and transparent FG films are a promising alternative for green and degradable substrates in the field of flexible electronics, including foldable displays, wearable devices, and health monitoring.

中文翻译：

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用于柔性电致发光器件的可持续透明鱼明胶薄膜。

在过去的几十年中，各种交流电致发光（ACEL）器件，尤其是柔性器件，被开发并应用于平板显示、大型装饰、标志显示照明、光信号等。透明塑料通常用作基板在 ACEL 设备中；但是，它们是不可降解的，可能会造成严重的环境污染。在这里，我们开发了一种基于透明鱼明胶 (FG) 薄膜的柔性瞬态 ACEL 装置。FG 薄膜由鱼鳞制成，具有可持续性、成本效益和环保性。这些薄膜可以在 60 °C 下几秒钟内溶解在水中，并在 24 天内在土壤中完全降解。这些 FG 薄膜在可见光谱中的透射率高达 91.1%，与聚对苯二甲酸乙二醇酯 (PET) (90.4%) 相当。在与银纳米线 (Ag NWs) 形成复合材料后，Ag NWs-FG 薄膜显示出高达 82.3% 的透射率和低至 22.4 Ω sq-1 的薄层电阻。基于 Ag NWs-FG 薄膜制造的 ACEL 器件表现出高柔韧性和高达 56.0 cd m-2 的亮度。该装置可在 3 分钟内溶解在水中。我们的工作表明，可持续、柔性和透明的 FG 薄膜是柔性电子领域（包括可折叠显示器、可穿戴设备和健康监测）中绿色和可降解基板的有前途的替代品。该装置可在 3 分钟内溶解在水中。我们的工作表明，可持续、柔性和透明的 FG 薄膜是柔性电子领域（包括可折叠显示器、可穿戴设备和健康监测）中绿色和可降解基板的有前途的替代品。该装置可在 3 分钟内溶解在水中。我们的工作表明，可持续、柔性和透明的 FG 薄膜是柔性电子领域（包括可折叠显示器、可穿戴设备和健康监测）中绿色和可降解基板的有前途的替代品。