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Microwave synthesis of Cu-doped ternary ZnCdS quantum dots with composition-controllable photoluminescence

  • Published:
Wuhan University Journal of Natural Sciences

Abstract

Bright Cu-doped ternary ZnCdS quantum dots (ZnCdS: Cu QDs) with varied Cd concentrations were synthesized in aqueous solution by using a convenient microwave method. These ternary QDs could be directly dispersed in water solution. By regulating the Cd2+ concentration from 0 to 50% (mole fraction of the cations), the photoluminescence excitation (PLE) peak of such ZnCdS:Cu QDs could be continuously redshifted from 320 nm to 380 nm, while their photoluminescence (PL) peak was redshifted from 490 nm to 580 nm, exhibiting multicolor Cu-related emissions. Furthermore, the quantum yield of the ZnCdS:Cu QDs could reach as high as 12% by regulating the Cu doping concentration. These ZnCdS:Cu ternary QDs with kind surface conditions and good composition-controllable optical properties may have potential application in many areas such as sensing, bioimaging, and light-emitting diodes.

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Authors and Affiliations

  1. School of Physics and Technology/Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Wuhan University, Wuhan, 430072, Hubei, China

    Yuezhou Yang, Shan Liang, Xuefeng Yu & Ququan Wang

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  1. Yuezhou Yang
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  2. Shan Liang
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  3. Xuefeng Yu
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  4. Ququan Wang
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Corresponding author

Correspondence to Xuefeng Yu.

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Foundation item: Supported by the National Natural Science Foundation of China (10904119)

Biography: YANG Yuezhou, male, Master candidate, research direction: quantum optics.

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Yang, Y., Liang, S., Yu, X. et al. Microwave synthesis of Cu-doped ternary ZnCdS quantum dots with composition-controllable photoluminescence. Wuhan Univ. J. Nat. Sci. 17, 217–222 (2012). https://doi.org/10.1007/s11859-012-0831-6

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  • DOI: https://doi.org/10.1007/s11859-012-0831-6

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