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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Carbon dots with efficient solid-state red-light emission through the step-by-step surface modification towards light-emitting diodes
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Carbon dots with efficient solid-state red-light emission through the step-by-step surface modification towards light-emitting diodes

机译：通过逐步的表面改变朝向发光二极管的逐步改变具有有效固态红光发射的碳点

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摘要

Carbon dots (CDs) have attracted extensive attention over the past decade due to their excellent advantages. However, few attempts have been reported for realizing the long-wavelength emission, especially for obtaining efficient solid-state red emission with high photoluminescence quantum yield (QY). Herein, we developed highly red light emitting CDs by the step-by-step surface modifications of the nitrogen-doped CDs. By introducing hexadecyltrimethyl ammonium bromide to modulate a red CD aqueous solution, the photoluminescence QY increases from 23.2% to 43.6%. Furthermore, we dispersed CDs in a PVP matrix for a solid-state film, where the solid-state quenching was effectively suppressed, and high QY (41.3%) of red light emission was achieved. Taking advantage of the as-prepared red light emitting CDs combining with the reported high quantum yield blue and green light emitting CDs, we realized UV-pumped WLEDs with tunable correlated color temperature from 7879 to 2961 K. Moreover, a high color rendering index (CRI) of 93 for WLEDs was realized, which is superior than the best records for the semiconductor quantum dot based WLEDs. Finally, the red light emitting CDs were demonstrated to have promising application as a red color converter in traditional YAG-based WLEDs to improve their CCT and CRI.
机译：由于其优异的优势，碳点（CDS）在过去十年中引起了广泛的关注。然而，已经报道了很少的尝试来实现长波长排放，特别是用于获得具有高光致发光量子产量（QY）的有效固态的红色发射。在此，我们通过氮气掺杂Cd的逐步表面改性开发出高度红发CD。通过引入红烯基三甲基溴化铵以调节红色Cd水溶液，光致发光Qy从23.2％增加至43.6％。此外，我们在PVP基质中分散CD的固态膜，其中固态猝灭有效地抑制，并且实现了高QY（41.3％）的红色发光。利用与报道的高量子屈服蓝色和绿色发光CD组合的AS制备的红色发光CD，我们实现了从7879到2961 K的可调谐相关色温的UV泵浦WLED。此外，高色渲染指数（实现了93个用于WLED的CRI，其优于基于半导体量子点的最佳记录。最后，证明了红发CD在传统的YAG的WLED中作为红色转换器具有有希望的应用，以改善其CCT和CRI。

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  • 作者

    Zhu Jinyang; Bai Xue; Chen Xu; Xie Zhifeng; Zhu Yongsheng; Pan Gencai; Zhai Yue; Zhang Hanzhuang; Dong Biao; Song Hongwei;

  • 作者单位

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Nanyang Normal Univ Dept Phys Nanyang 473000 Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Phys 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

    Jilin Univ Coll Elect Sci &

    Engn State Key Lab Integrated Optoelect 2699 Qianjin St Changchun 130012 Jilin Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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