1. Synthesis, characterization and judd–ofelt analysis of transparent photo luminence (H-Gd2o3:Eu3+) in hollow nanospheres.
- Author
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Lien, Pham Thi, Minh, Ngo Khac Khong, Van Thai, Dang, Huong, Nguyen Thanh, Vu, Nguyen, Khuyen, Hoang Thi, Huong, Tran Thu, Tien, Dinh Manh, Van, Nguyen Duc, and Minh, Le Quoc
- Subjects
X-ray emission spectroscopy ,LUMINESCENCE spectroscopy ,GADOLINIUM ,FOURIER transform infrared spectroscopy ,SCANNING transmission electron microscopy ,OPTICAL devices ,OPTICAL properties ,ULTRAVIOLET-visible spectroscopy - Abstract
Hollow nanosphere H-Gd
2 O3 :Eu3+ was fabricated by multi-step chemical incorporated with hole soft mold using glucose. The H-Gd2 O3 :Eu3+ monodisperse nanosphere was obtained after thermal treatment at 650 °C. The structural, morphological, and luminescence optical properties of fabricated transparent samples were determined by X-ray diffraction, transmission and field-emission scanning electron microscopies, UV–Visible spectroscopy, Fourier transform infrared spectroscopy, photoluminescence spectroscopy, and Brunauer–Emmett–Teller method. The hollow nanospheres with diameter in the range of 80-100 nm, and the thickness of the shell is about 19 nm tightly packed by nanoparticles. The material is strongly luminescent in the red region, peak emissions correspond to transition characteristics such as 580 (5 Do –7 Fo ), 592 (5 Do –7 F1 ), 611 (5 Do –7 F2 ), 650 (5 Do –7 F3 ), and 692 nm (5 Do –7 F4 ). The luminescence efficiency was calculated based on the Judd–Ofelt theory, the luminescence efficiency of hollow nanosphere H-Gd2 O3 :Eu3+ is higher 1.56 than times Gd2 O3 :Eu3+ 48.45% which leads for many transparent optical devices. [ABSTRACT FROM AUTHOR]- Published
- 2023
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