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Red-emitting carbon dots phosphors: a promising red color convertor toward warm white light emitting diodes

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Abstract

Various luminescent carbon materials are artificially synthesized and as admirable fluorescent materials because of the increased research of carbon nanodots (CDs). Herein, a novel solvent-dependent red CDs (rCDs) is introduced through solvothermal method. The as-prepared rCDs remain benzene structure and possess abundant surface function groups that endow them well solubility in various solvents. Furthermore, multicolor luminescence are observed when rCDs are dissolved in different solvents, and the emission wavelength of these materials can be well-tuned from 475 to 624 nm, which presents intensity solvent-dependent properties. Red luminescence carbon phosphors are successfully synthesized by mix rCDs with silica powder. Finally, warm white light emitting diodes (WLEDs) are constructed using rCDs powder with Ce3+: YAG single crystal and blue GaN chips. The results demonstrate that the rCDs can act as red component to modify the correlated color temperature (CCT) and the color rendering index (CRI) of WLEDs .

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Acknowledgements

The authors acknowledge the financial support from National Natural Sciences Foundation of China (Grants No. 51472183). The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Wenzhou University, Wenzhou, China

    Rongrong Yuan, Jianming Liu, Weidong Xiang & Xiaojuan Liang

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  1. Rongrong Yuan
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  2. Jianming Liu
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  3. Weidong Xiang
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  4. Xiaojuan Liang
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Correspondence to Weidong Xiang or Xiaojuan Liang.

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Yuan, R., Liu, J., Xiang, W. et al. Red-emitting carbon dots phosphors: a promising red color convertor toward warm white light emitting diodes. J Mater Sci: Mater Electron 29, 10453–10460 (2018). https://doi.org/10.1007/s10854-018-9103-3

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  • DOI: https://doi.org/10.1007/s10854-018-9103-3

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