研究目的
To develop water-triggered transient light emitting devices to address the issue of electronic-wastes from lighting and display products.
研究成果
The fabricated dissolvable and flexible light emitting fibers exhibit bright, uniform, omnidirectional light emission with excellent flexibility and mechanical stability. Multicolor emission is achievable in a single fiber. The fibers dissolve completely in water within 180 minutes, using nontoxic materials, offering a promising solution to reduce electronic waste from lighting and display products.
研究不足
The devices require high voltages (around 100 V to 300 V) for operation, which may limit portability. The dissolution time is up to 180 minutes, which might be slow for some applications. The use of AgNWs could involve cost and scalability issues.
1：Experimental Design and Method Selection:
An all-solution processing method was used to fabricate dissolvable and flexible light emitting fibers with a core–shell structure. The design rationale was to create devices that can disintegrate in water to reduce e-waste.
2：Sample Selection and Data Sources:
Silver nanowires (AgNWs), polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), and inorganic phosphor particles (ZnS:Cu and ZnS:Cu,Mn) were selected as materials. Samples were fabricated using dip-coating processes.
3：List of Experimental Equipment and Materials:
Equipment included a dip-coating setup, scanning electron microscope (SEM) for morphology characterization, and optoelectronic measurement tools. Materials included AgNWs, PVA fibers, PVP, ZnS:Cu, ZnS:Cu,Mn, ethanol solvent.
4：Experimental Procedures and Operational Workflow:
The inner electrode was coated by dipping a PVA fiber in AgNW ethanol suspension. The electroluminescent layer was deposited by immersing the conductive fiber in a phosphor-PVP mixture. The outer electrode was similarly coated. Multicolor emission was achieved by selective coating. Dissolution tests were conducted in deionized water.
5：Data Analysis Methods:
SEM was used for morphological analysis. Luminance and emission spectra were measured under varying voltages and frequencies. Data were analyzed using standard equations for electroluminescence.
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