Rapid Synthesis and Photoluminescence Properties of Eu-doped ZnO Nanoneedles via Facile Hydrothermal Method

doi:10.1007/s40242-014-4028-8

Abstract

Abstract:

Eu-doped ZnO nanoneedles with different doping concentrations were prepared via the facile hydrothermal method. The crystal structure, morphology and photoluminescence property of the ZnO nanoneedles were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS), photoluminescence spectroscopy(PL) and Raman spectroscopy. The results show that the europium ions are incorporated into the crystal lattice of ZnO matrix in trivalent ions. The nanoneedles are 2—3 μm in length and 100 nm in the tip diameter. PL and Raman measurements indicate that higher Eu³⁺doping concentration may destroy the crystallization of the nanoneedles and decrease the ratio of I_UV/I_DLE, which is mainly due to the more defects in the doped ZnO nanoneedles. And the characteristic red emissions of Eu³⁺ ions are found by the PL spectroscopy with the Eu³⁺ doping concentration increasing, which are attributed to the ⁵D₀→⁷F₀, ⁵D₀→<⁷F₁and ⁵D₀→⁷F₂ transitions.

Key words: ZnO nanoneedle, Hydrothermal method, Europium ion, Crystal structure, Photoluminescence property

LANG Jihui, WANG Jiaying, ZHANG Qi, XU Songsong, HAN Qiang, ZHANG Yan, ZHAI Hongju, CAO Jian, YAN Yongsheng, YANG Jinghai. Rapid Synthesis and Photoluminescence Properties of Eu-doped ZnO Nanoneedles via Facile Hydrothermal Method[J]. Chemical Research in Chinese Universities, 2014, 30(4): 538-542.

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