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Facile plasma-induced fabrication of fluorescent carbon dots toward high-performance white LEDs

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Abstract

In this study, we report a facile plasma-induced method to fabricate photoluminescent carbon dots (CDs) using acrylamide as the precursor in few minutes. The Fourier transform infrared spectra, UV–Vis absorption spectra, photoluminescence, fluorescent lifetime, and transmission electron microscopy of the as-prepared CDs were investigated thoroughly. The CDs have a narrow size distribution of 3–4 nm and exhibit strong blue fluorescence with quantum yield of ~6 %. More importantly, we explored the CDs as color converters along with CdTe quantum dots to generate white light-emitting diodes (LEDs) using a UV-LED chip as the excitation light source. Compared with the conventional YAG:Ce phosphor-based white LEDs, this resulted LED emitted white light with a higher color rendering index up to 87, which may find their potential in optoelectronic device.

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Acknowledgements

This study was supported by the National High Technology Research and Development Program of China (863 Program) (2012AA030313), the National Natural Science Foundation of China (21076103 and 21006046), the Specialized Research Fund for the Doctoral Program of Higher Education of China (20093221120002 and 20103221110001), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

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Authors and Affiliations

  1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, 5 Xin Mofan Road, Nanjing, 210009, People’s Republic of China

    Chen-Xiong Li, Chao Yu, Cai-Feng Wang & Su Chen

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  1. Chen-Xiong Li
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  2. Chao Yu
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  3. Cai-Feng Wang
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  4. Su Chen
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Correspondence to Su Chen.

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Li, CX., Yu, C., Wang, CF. et al. Facile plasma-induced fabrication of fluorescent carbon dots toward high-performance white LEDs. J Mater Sci 48, 6307–6311 (2013). https://doi.org/10.1007/s10853-013-7430-6

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  • DOI: https://doi.org/10.1007/s10853-013-7430-6

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