Synthesis, characterization and judd–ofelt analysis of transparent photo luminence (H-Gd2o3:Eu3+) in hollow nanospheres.

Hollow nanosphere H-Gd₂O₃:Eu³⁺ was fabricated by multi-step chemical incorporated with hole soft mold using glucose. The H-Gd₂O₃: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 (⁵D_o – ⁷F_o), 592 (⁵D_o – ⁷F₁), 611 (⁵D_o – ⁷F₂), 650 (⁵D_o – ⁷F₃), and 692 nm (⁵D_o – ⁷F₄). The luminescence efficiency was calculated based on the Judd–Ofelt theory, the luminescence efficiency of hollow nanosphere H-Gd₂O₃:Eu³⁺ is higher 1.56 than times Gd₂O₃:Eu³⁺ 48.45% which leads for many transparent optical devices. [ABSTRACT FROM AUTHOR]