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首页> 外文期刊>RSC Advances >Introducing carbon dots to moderate the blue emission from zinc vanadium oxide hydroxide hydrate nanoplates
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Introducing carbon dots to moderate the blue emission from zinc vanadium oxide hydroxide hydrate nanoplates

机译：引入碳点以中度氧化锌氧化锌氢氧化物水合物纳米烯醇化板的蓝色排放

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摘要

The relative intensity of the blue component of the total emission from light-emitting diodes (LEDs) can be an important factor when assessing their biological safety. Carbon quantum dots (CQDs) are compatible with many materials and present a high density of multiple surface states; the incorporation of such CQDs thus offers a route to modifying the emission from a given LED matrix. Here we report the fabrication of stable CQD/zinc pyrovanadate (Zn-3(OH)(2)V(2)O(7)2H(2)O) nanoplate composites via a facile hydrothermal route. Structural and morphological analyses confirm that the nanoplates are hexagonal phase and grew normal to the [0001] direction. X-ray photoemission spectroscopy, Raman and infrared spectroscopy demonstrate that the CQDs combine with nanoplates via surface carbon-oxygen bonds. Wavelength resolved photoluminescence measurements show that the relative intensity of the blue (2.93 eV) component of the emission associated with the nanoplates is significantly reduced by incorporating CQDs. We suggest that this reduction arises as a result of preferential trapping of the higher energy photoelectrons by surface defects on the CQDs.
机译：在发光二极管（LED）的总排放的蓝色成分的相对强度可以是评估其生物安全性时的重要因素。碳量子点（CQDS）与许多材料兼容，并且具有高密度的多个表面状态;因此，该等CQD的纳入提供了从给定的LED矩阵改变发射的路线。在这里，我们通过容易水热途径报告稳定CQD /锌吡烷酸盐（Zn-3（OH）（2）瓦（2）O（2）O）纳米层组合材料的制备。结构和形态学分析证实纳米板是六边形相位，并在垂直于[0001]方向。 X射线照相激光体，拉曼和红外光谱证明CQDS通过表面碳 - 氧键与纳米板相结合。波长分辨的光致发光测量表明，通过掺入CQDS，显着降低了与纳米板相关的发射的蓝色（2.93eV）组分的相对强度。我们建议由于CQD上的表面缺陷优先捕获较高能量光电子而产生的这种减少。

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  • 来源
    《RSC Advances》 |2018年第37期|共6页
  • 作者

    Huang Peng; Yuan Guodong; Wei Tongbo; Li Jinmin; Ashfold Michael N. R.;

  • 作者单位

    Chinese Acad Sci Inst Semicond Res &

    Dev Ctr Solid State Lighting Beijing Peoples R China;

    Chinese Acad Sci Inst Semicond Res &

    Dev Ctr Solid State Lighting Beijing Peoples R China;

    Chinese Acad Sci Inst Semicond Res &

    Dev Ctr Solid State Lighting Beijing Peoples R China;

    Chinese Acad Sci Inst Semicond Res &

    Dev Ctr Solid State Lighting Beijing Peoples R China;

    Univ Bristol Sch Chem Bristol BS8 1TS Avon England;

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  • 正文语种 eng
  • 中图分类 化学;
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