Effects of annealing temperature on the structure and photoluminescence properties of the ZnO/ZnAl2O4/Ca5Al6O14/Ca3Al4ZnO10:0.1% Ce3+ mixed-phases nanophosphor prepared by citrate sol–gel process

Please read abstract in the article.The South African National Research Foundation (NRF) Thuthuka Programme and NRF incentive funding for rated researchers (IPRR).https://link.springer.com/journal/3392021-09-28hj2021Physic

The structural, morphological and optical studies on BaAl2O4/MgAl2O4/MgO:x% Gd3+ (0 ≤ x ≤ 1.1) mixed phases synthesized by sol-gel method

DATA AVAILABILITY : Data will be made available on request.Please read abstract in the article.The South African National Research Foundation (NRF) Thuthuka programme, NRF incentive funding for rated researchers (IPRR), SMU Physics department research fund and SMU Electron Microscope Unit.https://www.elsevier.com/locate/physbhj2024PhysicsNon

Effects of varying Alx moles on structure and luminescence properties of ZnAlxO1.5x+1:0.1 mol% Tb3+ nanophosphor prepared using citrate sol–gel method

Please read abstract in the article.http://www.journals.elsevier.com/journal-of-rare-earthshj2023Physic

Effects of varying Sm3+ concentration on the structure, morphology and photoluminescence properties of the BaAl2O4 /CaAl2O4/Ca4Al6O13/Ca3Al2O6:x% Sm3+ (0 ≤ x ≤ 1.9) mixed phases using citrate sol-gel method

DATA AVAILABILITY STATEMENT : Data will be made available on request.Please read abstract in the article.The South African National Research Foundation (NRF) Thuthuka programme, NRF incentive funding for rated researchers (IPRR).http://www.cell.com/heliyonhj2023PhysicsNon

Analysis of Nd3+ concentration on the structure, morphology and photoluminescence of sol-gel Sr3ZnAl2O7 nanophosphor

Neodymium activated strontium zinc aluminate (Sr3ZnAl2O7:x%Nd3+) nanophosphor was synthesized using the sol-gel technique whereby the Nd3+ concentration was varied in the range 0 ≤ x ≤ 2. The effect of Nd3+ concentration on the structure, particle morphology and photoluminescence properties of Sr3ZnAl2O7 were investigated. The X-ray diffraction (XRD) results revealed that all samples resembled the mixture of both ZnAl2O4 and Sr3Al2O6 cubic structures. Nd3+ doping influenced the crystallite sizes of the prepared phosphor materials. The energy dispersive X-ray spectroscopy (EDS) results confirmed the presence of all expected elements in the composition. Scanning electron microscopy (SEM) revealed that as the Nd3+ concentration increased the surface morphology changed to smooth mountain-like structures. The ultraviolet–visible (UV–Vis) diffuse reflection spectroscopy showed that the band gap of Sr3ZnAl2O7 can be tuned from 2.74 to 2.95 eV by increasing the Nd3+ concentration. When the host is excited above the bandgap (374 nm), broad emission attributed to defects occurs with the maximum near 585 nm. Doped samples excited in this manner do not exhibit additional luminescence due to the Nd3+ ions, but in contrast there is a small dip in the defect emission band near 585 nm due to absorption attributed to Nd3+ ions. Characteristic infrared emissions of Nd3+ ions at 885, 1064 and 1340 nm were observed by directly exciting the Nd3+ ions at 585 nm (4I9/2 → 5G5/2 + 2G7/2) and were attributed to 4F3/2 → 4I9/2, 4I11/2 and 4I13/2 transitions, respectively. The Commission Internationale de l’Eclairage (CIE) coordinates results showed that the orange emission colour is from the host. Keywords: Sol-gel, Nd3+ activated, Sr3ZnAl2O7, Photoluminescence, CI

The effects of varying the annealing period on the structure, morphology and optical properties of MgAl2O4:0.1% Mn2+ nanophosphors

Please read abstract in the article.The South African National Research Foundation (NRF) Thuthuka programme and NRF incentive funding for rated researchers (IPRR).https://link.springer.com/journal/339hj2021Physic

Citrate sol-gel synthesis of BaAl2O4:x% Cu2+ (0 ≤ x ≤ 1) nano-phosphors : structural, morphological and photoluminescence properties

Please read abstract in the article.The South African National Research Foundation (NRF) Thuthuka programmehttp://www.elsevier.com/locate/optmat2021-11-01hj2021Physic