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首页> 外文期刊>Nanotechnology >Emitting color tunable carbon dots by adjusting solvent towards light-emitting devices
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Emitting color tunable carbon dots by adjusting solvent towards light-emitting devices

机译：通过将溶剂调节朝向发光器件来发射颜色可调碳点

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摘要

Carbon dots (CDs), one of the most significant classes of carbon-based nanophosphors, have attracted extensive attention in recent years. However, few attempts have been reported for realizing CDs with tunable emissions, especially for obtaining the red-light emissions with high photoluminescence quantum yields. Herein, we synthesized CDs with different chromatic blue, green and red emissions by facilely changing the reaction solvent during hydrothermal conditions. The photoluminescence quantum yields of 34%, 19% and 47% for the blue, green and red emissions, respectively, were achieved. Furthermore, the solid-state CD/PVA composite films were constructed through mixing the CDs with PVA polymer, in which the self-quenching of photoluminescence of CDs had been successfully avoided benefiting from the formation of hydrogen bonds between the CDs and PVA molecules. Finally, the warm white light emitting diode (WLED) was fabricated by integrating CD/PVA film on a UV-LED chip. The WLED exhibited the Commission International de l'Eclairage coordinates (CIE) of (0.38, 0.34), correlated color temperature of 3913 K and color rendering index of 91, respectively, which were comparable with the commercial WLEDs.
机译：碳点（CDS）是最重要的碳基纳米膦群中的一种，近年来引起了广泛的关注。然而，据报道，利用可调谐排放的CD来报告几次尝试，特别是用于获得具有高光致发光量子产量的红光发射。在此，通过在水热条件下施法改变反应溶剂，我们合成具有不同色蓝，绿色和红色排放的CD。达到了蓝色，绿色和红色排放的34％，19％和47％的光致发光量子产率为34％，19％和47％。此外，通过将Cds与PVA聚合物混合来构建固态Cd / PVA复合膜，其中已经成功地避免了Cds和PVA分子之间的氢键的形成，从而使Cds的光致发光的自猝灭。最后，通过将CD / PVA膜整合在UV-LED芯片上来制造暖白光二极管（WLED）。 WLED展示了（0.38,0.34）的委员会国际de l'Eclairage（CIE），相关色温为3913 k和91的显色指数，与商业WLED相当。

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  • 来源
    《Nanotechnology》 |2018年第8期|共7页
  • 作者

    Zhu Jinyang; Bai Xue; Bai Jialin; Pan Gencai; Zhu Yongsheng; Zhai Yue; Shao He; Chen Xu; Dong Biao; Zhang Hanzhuang; Song Hongwei;

  • 作者单位

    Jilin Univ State Key Lab Integrated Optoelect Coll Elect Sci &

    Engn 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ State Key Lab Integrated Optoelect Coll Elect Sci &

    Engn 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Phys Changchun 130012 Jilin Peoples R China;

    Jilin Univ State Key Lab Integrated Optoelect Coll Elect Sci &

    Engn 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Nanyang Normal Univ Coll Phys &

    Elect Engn Nanyang 73061 Peoples R China;

    Jilin Univ State Key Lab Integrated Optoelect Coll Elect Sci &

    Engn 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ State Key Lab Integrated Optoelect Coll Elect Sci &

    Engn 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ State Key Lab Integrated Optoelect Coll Elect Sci &

    Engn 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ State Key Lab Integrated Optoelect Coll Elect Sci &

    Engn 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Phys Changchun 130012 Jilin Peoples R China;

    Jilin Univ State Key Lab Integrated Optoelect Coll Elect Sci &

    Engn 2699 Qianjin St Changchun 130012 Jilin 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

    solvothermal; chromatic luminescence; surface states; solid films; WLEDs;

    机译：溶剂;色彩发光;表面状态;实体薄膜;WLEDS;

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