Synthesis of Y2O2SO4 submicron spheres and photoluminescence behaviour with Tb3+ doping

Environmentally benign fabrication of superparamagnetic and photoluminescent Ce,Tb-codoped Fe3O4-gluconate nanocrystals from low-quality iron ore intended for wastewater treatment

“…The Tb-containing metal oxide nanoparticles mainly give a green fluorescence (520-570 nm range), as reported previously. 81,82 However, no prominent peaks for Tb 3+ are observed herein for co-doping. After doping, no major sharp peaks for both Ln 3+ ions can be identified for all doped samples, which may be attributed to the presence of a very low percentage of doping, where the sharp Ln 3+ -associated peaks are submerged inside the broad peak of pure Fe 3 O 4 .…”

Impact of Structural Changes on Energy Transfer in the Anion-Engineered Re3+:Y2O3 Through Low-Temperature Synthesis Approach

“…The charge transfer peak in the excitation and 5 D 0 → 7 F 2 transition in the emission spectrum of Eu 3+ shifted to higher wavelengths (617–618 nm) compared with Y 2 O 3 :Eu 3+ . Low-temperature approaches for Y 2 O 2 SO 4 :Eu 3+ have been reported , ; however, the pure phase Y 2 O 2 SO 4 is only obtained for temperatures above 950 °C. Similarly, hexagonal (trigonal) phase Yb 3+ /Er 3+ doped Y 2 O 2 S was obtained through solid-state flux fusion with sulfur powder at 1150 °C in 1 h with internal quantum yields of green emission and infrared emission of 67 and 97%, respectively .…”