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首页> 外文期刊>Nanotechnology >Enhancing the thermal dissipation of a light-converting composite for quantum dot-based white light-emitting diodes through electrospinning nanofibers
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Enhancing the thermal dissipation of a light-converting composite for quantum dot-based white light-emitting diodes through electrospinning nanofibers

机译：通过静电纺丝纳米纤维增强量子点基白色发光二极管的光转换复合材料的热耗散

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摘要

Quantum dots (QDs) have been developed as one of the most promising light-converting materials for white light-emitting diodes (LEDs). In current QD-based LED packaging structures, composites of QDs and polymers are used as light-converting layers. However, the ultralow thermal conductivity of such composites seriously hinders the dissipation of QD-generating heat. In this paper, we demonstrate a method to enhance the thermal dissipation of QD-polymer composites through electrospinning polymer nanofibers. QD-polymer films embedded by electrospun nanofibers were prepared. Benefitting from aligned polymer chains in the electrospun nanofibers, the through-panel and in-panel thermal conductivities of the proposed QD-polymer film increased by 39.9% and 423.1%, respectively, compared to traditional QD-polymer film. The proposed and traditional QD-polymer films were both packaged on chip on board (CoB) LEDs for experimental comparison. Compared to traditional QD-polymer film, the luminous flux and luminous efficiency of the LEDs were increased by up to 51.8% and 42.9% by the proposed QD-polymer film under a current of 800 mA, respectively. With an increase in the driving current from 20-800 mA, the correlated color temperature (CCT) variation decreased by 72.7%. The maximum temperatures in the QD-polymer films were reduced from 419 K-411 K under a driving current of 200 mA.
机译：量子点（QDS）已被开发为白色发光二极管（LED）最有前景的光转换材料之一。在基于QD的LED封装结构中，QD和聚合物的复合材料用作光转换层。然而，这种复合材料的超级导热率严重阻碍了QD发热的耗散。在本文中，我们证明了一种通过静电纺丝聚合物纳米纤维增强QD聚合物复合材料的热耗散的方法。制备嵌入电纺纳米纤维的QD聚合物膜。与传统的QD聚合物薄膜相比，所提出的QD聚合物膜的通孔和内部导热率的益处聚体纳米纤维中的对齐聚合物链中的益处和面板内导管分别增加了39.9％和423.1％。所提出的和传统的QD聚合物薄膜均在芯片（COB）LED上包装，用于实验比较。与传统的QD-聚合物膜相比，LED的发光通量和发光效率分别在800mA的电流下提出了高达51.8％和42.9％。随着20-800mA的驱动电流的增加，相关的色温（CCT）变化降低了72.7％。在200mA的驱动电流下，QD-聚合物膜中的最大温度从419k-411k降低。

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  • 来源
    《Nanotechnology》 |2017年第26期|共10页
  • 作者

    Zheng Huai; Lei Xiang; Cheng Ting; Liu Sheng; Zeng Xiaoliang; Sun Rong;

  • 作者单位

    Wuhan Univ Sch Power &

    Mech Engn Hubei Key Lab Waterjet Theory &

    New Technol Wuhan 430072 Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Mech Sci &

    Engn Wuhan 430074 Peoples R China;

    Wuhan Univ Sch Power &

    Mech Engn Hubei Key Lab Waterjet Theory &

    New Technol Wuhan 430072 Peoples R China;

    Wuhan Univ Sch Power &

    Mech Engn Hubei Key Lab Waterjet Theory &

    New Technol Wuhan 430072 Peoples R China;

    Univ Chinese Acad Sci Shenzhen Coll Adv Technol Shenzhen 518055 Peoples R China;

    Univ Chinese Acad Sci Shenzhen Coll Adv Technol Shenzhen 518055 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    light-emitting diodes; electrospun nanofibers; quantum dot; thermal conductivity;

    机译：发光二极管;电纺纳米纤维;量子点;导热系数;

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