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Shell-thickness dependent optical properties of CdSe/CdS core/shell nanocrystals coated with thiol ligands

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Abstract

Using CdSe/CdS core/shell nanocrystals with 1–10 monolayers of CdS shell as the model system, we studied effects of thiol ligands on optical properties of the nanocrystals. The core/shell nanocrystals with original ligands possessed near unity photoluminescence (PL) quantum yield and single-exponential PL decay dynamics. The effects of thiol ligands on optical properties were found to depend on the shell thickness, environment (with/without oxygen), and excitation power (single- or multi-exciton). Systematic and quantitative results reported in this work should provide necessary information for fundamental understanding and technical applications of quantum dots (QDs) coated with thiol ligands.

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Authors and Affiliations

  1. Center for Chemistry of Novel & High-Performance Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China

    Wanzhen Lin, Yuan Niu, Renyang Meng, Lin Huang, Hujia Cao, Zhenxing Zhang, Haiyan Qin & Xiaogang Peng

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  1. Wanzhen Lin
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  2. Yuan Niu
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  3. Renyang Meng
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  4. Lin Huang
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  6. Zhenxing Zhang
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  8. Xiaogang Peng
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Correspondence to Xiaogang Peng.

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Lin, W., Niu, Y., Meng, R. et al. Shell-thickness dependent optical properties of CdSe/CdS core/shell nanocrystals coated with thiol ligands. Nano Res. 9, 260–271 (2016). https://doi.org/10.1007/s12274-016-1014-0

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  • DOI: https://doi.org/10.1007/s12274-016-1014-0

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