Nanosheet-Based Microspheres of Eu3+-doped ZnO with Efficient Energy Transfer from ZnO to Eu3+ at Room Temperature

Authors

  • X. Zeng,

    1. Key Laboratory of Materials Physics, Institute of Solid state Physics, Graduate School of the Chinese Academy of Science, Chinese Academy of Sciences, P. O. Box 1129, Hefei 230031 (P. R. China)
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  • J. Yuan,

    1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (P. R. China)
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  • Z. Wang,

    1. Key Laboratory of Materials Physics, Institute of Solid state Physics, Graduate School of the Chinese Academy of Science, Chinese Academy of Sciences, P. O. Box 1129, Hefei 230031 (P. R. China)
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  • L. Zhang

    1. Key Laboratory of Materials Physics, Institute of Solid state Physics, Graduate School of the Chinese Academy of Science, Chinese Academy of Sciences, P. O. Box 1129, Hefei 230031 (P. R. China)
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  • This work was financially supported by the National Major Project of Fundamental Research: Nanomaterials and Nanostructures (Grant no. 2005CB623603) and the Natural Science Foundation of China (Grant No. 10304018). We also thank Dr. C. H. Ye and Dr. H. B. Zeng for helpful discussions and advice. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

original image

Nanosheet-based microspheres of ZnO:Eu (see figure) are fabricated via pyrolysis of Zn5(OH)6(CO3)2 hierarchical microspheres. Efficient ZnO→Eu3+ energy transfer is observed, which is attributed to surface defects at the nonpolar [11?00] surface of a ZnO nanosheet that couples with Eu3+ and stabilizes the Eu2+ trap level just below the conduction band of ZnO.

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