INFLUENCE OF ANNEALING TEMPERATURES ON STRUCTURAL AND OPTICAL PROPERTIES OF ION Er3+ DOPED ZnO/SiO2 NANOCOMPOSITE FILMS

Le Thi Thu Hien; Le My Phuong; Le Thi Hue

Le Thi Thu Hien Department of Basic Science, Hung Yen University of Technology and Education
Le My Phuong Viet Nam Maritime University, Hai Phong, Viet Nam
Le Thi Hue Nguyen Mong Tuan High School, Rung Thong Town, Dong Son District, Thanh Hoa Province

Abstract

In this study, we report the influence of annealing temperature on morphology, microstructures, and optical properties of ion Er3+ doped ZnO–SiO2 nanocomposites thin films. Thin layers of ZnO–SiO2 nanocomposites doped with Er3+ were prepared by sol-gel method and spin-coating process. The structure and morphology of the thin films as a function of annealing temperature were studied and analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM). Upon annealing temperatures at 700 oC, we observed emission peaks at around 1540 nm assigned for the 4I13/2 -4I15/2 transition of Er3+ ions. Energy transfer processes upon photon absorptions within ZnO nanocrystals and Eu3+ ions are discussed via photoluminescence spectrum in the range of excitation wavelength 325 nm.

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