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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Transparent and Light-Emitting Epoxy Nanocomposites Containing ZnO Quantum Dots as Encapsulating Materials for Solid State Lighting
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Transparent and Light-Emitting Epoxy Nanocomposites Containing ZnO Quantum Dots as Encapsulating Materials for Solid State Lighting

机译：包含ZnO量子点的透明和发光环氧树脂纳米复合材料，作为固态照明的封装材料

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摘要

Polymer nanocomposites are usually made by incorporating dried nanoparticles into polymer matrices. This would easily lead to aggregation of nanoparticles and then would readily bring about opaqueness for nanocomposites based on functionally transparent polymers. In this work, preparation of highly transparent ZnO quantum dots (ZnO-QDs)/epoxy nanocomposites that can emit intense luminescence was reported for the first time by uniformly dispersing ZnO quantum dots in a transparent epoxy resin via a direct dispersion method. The direct dispersion of ZnO quantum dots without drying in the epoxy matrix could effectively avoid aggregation of fine quantum dots and showed a good dispersity of ZnO-QDs in the epoxy matrix. Such materials showed a high transparency in the visible region and exited a broad emission spectrum peaked at 442 nm. On the other hand, in traditional solid state lighting emission diodes, semiconductor quantum dots are used as phosphors that are attached to the die of the lighting emission diode (LED) lamps for emitting luminescence. In this work, the as-prepared ZnO-QDs/epoxy nanocomposites were successfully employed as packaging materials for solid state lighting emission diodes in which conventional phosphors are not required while the nanocomposite encapsulating materials are responsible for emitting luminescence and thus the encapsulated LED lamps have an innovative structure. Consequently, the as-prepared ZnO-QDs/epoxy nanocomposites are promising for use as novel encapsulating materials in LED technology due to the much simplified encapsulating process.
机译：聚合物纳米复合材料通常是通过将干燥的纳米颗粒掺入聚合物基体中制成的。这将容易导致纳米颗粒的聚集，然后容易导致基于功能透明聚合物的纳米复合材料的不透明性。在这项工作中，首次报道了通过直接分散法将ZnO量子点均匀分散在透明环氧树脂中，制备出可以发出强烈发光的高透明ZnO量子点（ZnO-QDs）/环氧树脂纳米复合材料的方法。 ZnO量子点直接分散而不在环氧树脂基质中干燥可以有效地避免细量子点的聚集，并显示出ZnO-QDs在环氧树脂基质中的良好分散性。这样的材料在可见光区域显示出高透明性，并且退出了在442 nm处达到峰值的宽发射光谱。另一方面，在传统的固态发光二极管中，半导体量子点用作附接到发光二极管（LED）灯的管芯上的用于发光的磷光体。在这项工作中，所制备的ZnO-QDs /环氧树脂纳米复合材料被成功地用作固态照明发光二极管的包装材料，其中不需要常规的荧光粉，而纳米复合材料封装的材料负责发光，因此封装的LED灯具有创新的结构。因此，由于大大简化了封装工艺，因此制备的ZnO-QDs /环氧纳米复合材料有望在LED技术中用作新型封装材料。

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