Nano Archive

Synthesis and photoluminescent properties of rare earth doped ZnO hierarchical microspheres

Zeng, Xiaoyan and Yuan, Junlin and Zhang, Lide (2008) Synthesis and photoluminescent properties of rare earth doped ZnO hierarchical microspheres. JOURNAL OF PHYSICAL CHEMISTRY C, 112 (10). pp. 3503-3508.

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Hierarchical ZnO microspheres constructed by mesoporous quasi-single-crystalline ZnO nanosheets were fabricated by pyrolysis of the microspheres of layered hydroxide zinc carbonate, Zn-5(CO3)(2)(OH)(6), which was the hydrothermal precipitate of zinc nitrate and urea. A growth mechanism of Zn-5(CO3)(2)(OH)(6) microspheres was proposed. During the pyrolysis process, single-crystalline Zn-5(CO3)(2)(OH)(6) nanosheets were transformed into mesoporous quasi-single-crystalline ZnO nanosheets. When the samples were doped with trivalent rare earth ion, RE3+ (RE = Pr, Sm, Tb, Ho, Tm), no ZnO --> RE3+ energy transfer was observed. However, the ZnO:Eu3+ sample showed efficient Eu3+ emissions under UV photon excitation (lambda < 365 nm), which is attributed to energy transfer from photon-generated electron-hole pairs to Eu3+ ions in the surface layer of the ZnO nanosheet.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
Physical Science > Photonics
ID Code:1890
Deposited By:Farnush Anwar
Deposited On:16 Dec 2008 14:08
Last Modified:16 Dec 2008 14:08

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