Synthesis, characterization and judd–ofelt analysis of transparent photo luminence (H-Gd 2 o 3 :Eu 3+ ) in hollow nanospheres

Hollow nanosphere H-Gd 2 O 3 :Eu 3+ was fabricated by multi-step chemical incorporated with hole soft mold using glucose. The H-Gd 2 O 3 :Eu 3+ 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 D o – 7 F o ), 592 ( 5 D o – 7 F 1 ), 611 ( 5 D o – 7 F 2 ), 650 ( 5 D o – 7 F 3 ), and 692 nm ( 5 D o – 7 F 4 ). The luminescence efficiency was calculated based on the Judd–Ofelt theory, the luminescence efficiency of hollow nanosphere H-Gd 2 O 3 :Eu 3+ is higher 1.56 than times Gd 2 O 3 :Eu 3+ 48.45% which leads for many transparent optical devices.