Eu3+ as optical probe of the structure in amorphous and nanocrystalline ZnO sol-gel films

E. Terán-Hinojosa; J. A. García-Macedo; G. Valverde-Aguilar

doi:10.1117/12.929114

15 October 2012 Eu³⁺ as optical probe of the structure in amorphous and nanocrystalline ZnO sol-gel films

E. Terán-Hinojosa, J. A. García-Macedo, G. Valverde-Aguilar

Proceedings Volume 8456, Nanophotonic Materials IX; 845603 (2012) https://doi.org/10.1117/12.929114
Event: SPIE NanoScience + Engineering, 2012, San Diego, California, United States

Abstract

Amorphous and nanocrystalline Eu³⁺-doped ZnO thin films were synthesized by the sol–gel process. The films were spin-coated on glass substrates. The samples were annealed at 500°C for 1 hour to produce a nanocrystalline ZnO/Eu³⁺ films. The samples were characterized using UV-Vis absorption and infrared spectroscopy. A crystalline phase, wurtzite, was detected by X-ray diffraction. A spectroscopic study of the Eu³⁺ impurity in function of the heat treatment provided to the ZnO matrix was done. Results of emission and excitation studies at room temperature of Eu³⁺ inserted in the ZnO matrix are presented. For amorphous and nanocrystalline samples, the relative ratio of the ⁷F₂/⁷F₁ transitions was calculated. The evolution of this ratio was interpreted in terms of the Eu³⁺ symmetry site change when the nanocrystalline ZnO films. This fact was confirmed measuring the Eu³⁺ lifetimes.

Citation Download Citation

E. Terán-Hinojosa, J. A. García-Macedo, and G. Valverde-Aguilar "Eu³⁺ as optical probe of the structure in amorphous and nanocrystalline ZnO sol-gel films", Proc. SPIE 8456, Nanophotonic Materials IX, 845603 (15 October 2012); https://doi.org/10.1117/12.929114

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