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Green synthesis of white-light-emitting ZnSe:Eu2+, Mn2+ quantum dots in an aqueous solution

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Abstract

High-quality ZnSe:Eu, Mn quantum dots (QDs) with white light emitting were synthesized via a green preparation method in an aqueous solution using thioglycolic acid as a stabilizing agent. The composition of the QDs could be flexibly controlled by varying the amount of Eu or Mn cation. The effects of reflux time and Eu2+ ion dopant concentration on the luminescence properties were systematically investigated. The obtained QDs were characterized by photoluminescence spectrometry, X-ray powder diffraction, and high-resolution transmission electron microscopy. The proposed method formed cubic ZnSe:Mn2+, Eu2+ QDs with the maximum emission peak at 460 and 580 nm. In the optimal condition, the quantum yields of ZnSe:Mn2+, Eu2+ QDs could reach 27.68%. The CIE color coordinates were (0.328, 0.334), which agreed with those of pure white light (0.33, 0.33). The results verified that the ZnSe:Mn2+, Eu2+ QDs exhibited potential in light-emitting diode applications.

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Acknowledgements

This work was supported by grants from the Guangxi Natural Science Foundation (2015GXNSFBA139043) and Yulin Normal University Research Grant (2016YJKY15).

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Authors and Affiliations

  1. Guangxi Key Laboratory of Agricultural Products Processing (Cultivating Base), Colleges and Universities Key Laboratory for Efficient Use of Agricultural Resources in the Southeast of Guangxi, College of Chemistry and Food Science, Yulin Normal University, Yulin, 537000, Guangxi, People’s Republic of China

    Rongfang Wang, Xingming Wei, Ronghuan Qin, Pingfang Tao, Liqin Qin & Haichuang Liang

  2. Guangxi Experiment Center of Information Science, Guilin, People’s Republic of China

    Rongfang Wang, Xingming Wei & Pingfang Tao

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  1. Rongfang Wang
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  2. Xingming Wei
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  3. Ronghuan Qin
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  5. Liqin Qin
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  6. Haichuang Liang
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Correspondence to Rongfang Wang.

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Wang, R., Wei, X., Qin, R. et al. Green synthesis of white-light-emitting ZnSe:Eu2+, Mn2+ quantum dots in an aqueous solution. J Mater Sci 52, 6994–6998 (2017). https://doi.org/10.1007/s10853-017-0932-x

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  • DOI: https://doi.org/10.1007/s10853-017-0932-x

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