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Preparation and formation mechanism of strong violet luminescent CdS quantum dots by using a ligand exchange strategy

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Abstract

A simple and general method has been proposed for preparing strong violet emitting CdS quantum dots, in which a ligand exchange strategy was applied to surface passivation and functionalization with good reproducibility. The resulting quantum dots showed a visible violet luminescence with emission peak centered near 423 nm and photoluminescence quantum yields reached over 30%. Additionally, different mercapto-compounds used as ligands can make different functionalized surfaces, favoring quantum dots dispersion in different media and their further applications. It was observed that the band edge emission has the main contribution to the bright violet luminescence.

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Acknowledgments

The authors are grateful for the financial support from National Natural Science Foundation of China (Contract No.20575002).

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Authors and Affiliations

  1. College of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids, Anhui Normal University, Wuhu, 241000, P. R. China

    Tian-Long Zhang, Yun-Sheng Xia, Xue-Lian Diao & Chang-Qing Zhu

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  1. Tian-Long Zhang
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  2. Yun-Sheng Xia
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  3. Xue-Lian Diao
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  4. Chang-Qing Zhu
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Correspondence to Chang-Qing Zhu.

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Zhang, TL., Xia, YS., Diao, XL. et al. Preparation and formation mechanism of strong violet luminescent CdS quantum dots by using a ligand exchange strategy. J Nanopart Res 10, 59–67 (2008). https://doi.org/10.1007/s11051-007-9221-y

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  • DOI: https://doi.org/10.1007/s11051-007-9221-y

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