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 .

Notes

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.

Supplementary material

10854_2018_9103_MOESM1_ESM.doc (266 kb)
Supplementary material 1 (DOC 266 KB)

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Wenzhou UniversityWenzhouChina

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