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首页> 外文期刊>ACS applied materials & interfaces >Ultrastable, Deformable, and Stretchable Luminescent Organic-Inorganic Perovskite Nanocrystal-Polymer Composites for 3D Printing and White Light-Emitting Diodes
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Ultrastable, Deformable, and Stretchable Luminescent Organic-Inorganic Perovskite Nanocrystal-Polymer Composites for 3D Printing and White Light-Emitting Diodes

机译：用于3D印刷和白色发光二极管的无稳压，可变形和可伸缩的发光有机 - 无机钙钛矿纳米晶 - 聚合物复合材料

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摘要

Organic-inorganic perovskite nanocrystals with excellent optoelectronic properties have been utilized in various applications, despite their stability issues. The perovskite materials are sensitive to environments such as polar solvents, moisture, and heat. Thus, they are not used for extrusion three-dimensional (3D) printing, as it is usually conducted in the ambient environment and requires heating to liquefy the printed materials. In this work, 11 thermoplastic polymers conventionally used for extrusion 3D printing were investigated to test their capability as protective encapsulation materials for perovskite nanocrystals. Three of them exhibited good protective properties, and one (polycaprolactone, PCL) of these three could be blended with perovskite nanocrystals to form perovskite nanocrystal-PCL composites, which were deformable and stretchable once heated. Because of the low melting point of PCL, the perovskite nanocrystals maintained their optical properties after 3D printing, and the printed objects were still having fluorescent behavior. Moreover, fluorescent micrometer-sized fibers based on the perovskite nanocrystal-PCL composites could also be simply prepared using cotton candy makers. Perovskite nanocrystal-PCL composite films with different emission wavelengths were incorporated with blue light-emitting diodes (LEDs) to realize white LEDs with Commission Internationale de l'Eclairage chromaticity coordinates of (0.33, 0.33).
机译：尽管其稳定性问题，各种应用中，具有优异的光电性能的有机 - 无机钙钛矿纳米晶体已在各种应用中使用。钙钛矿材料对极性溶剂，水分和热量等环境敏感。因此，它们不用于挤出三维（3D）印刷，因为它通常在周围环境中进行，并且需要加热以液化印刷材料。在这项工作中，研究了常规用于挤出3D印刷的11种热塑性聚合物，以测试它们作为Perovskite纳米晶体的保护性包封材料的能力。其中三种表现出良好的保护性，这三种（聚己内酯，PCL）可以与钙钛矿纳米晶体混合以形成钙钛矿纳米晶-PCL复合材料，这是可变形和拉伸的一旦加热。由于PCL的低熔点，钙钛矿纳米晶体在3D打印后保持其光学性质，并且印刷物体仍具有荧光行为。此外，基于钙钛矿纳米晶体-PCL复合材料的荧光微米尺寸纤维也可以简单地使用棉花糖制造商制备。具有不同发射波长的钙钛矿纳米晶 - PCL复合膜与蓝色发光​​二极管（LED）纳入，以实现具有委员会Internationale De L'EclaReage的白色LED（0.33,0.33）。

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