Search Results - "Ntwaeaborwa, O M"

Rare Earth Doped Zinc Oxide Nanophosphor Powder: A Future Material for Solid State Lighting and Solar Cells by Kumar, Vinod, Ntwaeaborwa, O. M, Soga, T, Dutta, Viresh, Swart, H. C

“…A comprehensive review of up-conversion (UP) and down-conversion (DC) or down shifting of rare earth (RE) doped zinc oxide (ZnO) nanophosphors is presented…”
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Effect of annealing on the structural, morphological and photoluminescence properties of ZnO thin films prepared by spin coating by Kumar, Vinod, Kumar, Vijay, Som, S., Yousif, A., Singh, Neetu, Ntwaeaborwa, O.M., Kapoor, Avinashi, Swart, H.C.

“…[Display omitted] •ZnO thin films were deposited by a spin coating technique on Si substrates.•Grain growth was observed with an increase in annealing time at…”
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Optimization of the electron transport in quantum dot light-emitting diodes by codoping ZnO with gallium (Ga) and magnesium (Mg) by Kim, Hong Hee, Kumi, David O, Kim, Kiwoong, Park, Donghee, Yi, Yeonjin, Cho, So Hye, Park, Cheolmin, Ntwaeaborwa, O. M, Choi, Won Kook

“…In our study, to optimize the electron-hole balance through controlling the electron transport layer (ETL) in the QD-LEDs, four materials (ZnO, ZnGaO, ZnMgO,…”
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Influence of ultrasonication times on the tunable colour emission of ZnO nanophosphors for lighting applications by Kumar, Vinod, Swart, H.C., Gohain, Mukut, Kumar, Vijay, Som, S., Bezuindenhoudt, B.C.B., Ntwaeaborwa, O.M.

“…•ZnO nanophosphors (NPr) were synthesized by sonochemical method.•A combination of UV and green light emission were observed.•O1s XPS peaks consist of two…”
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Effect of Br+6 ions on the structural, morphological and luminescent properties of ZnO/Si thin films by Kumar, Vinod, Singh, Fouran, Ntwaeaborwa, O.M., Swart, H.C.

“…•UV and blue-green light emitting ZnO films were synthesized by RF magnetron sputtering.•ZnO films were irradiated by 80meV Br+6 ions at various ion…”
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Effects of Pb2+ ions concentration on the structure and PL intensity of Pb-doped ZnAl2O4 nanocrystals synthesized using sol–gel process by Motloung, S. V., Dejene, F. B., Swart, H. C., Ntwaeaborwa, O. M.

“…Undoped and Pb 2+ -doped ultrafine cubic zinc aluminate (ZnAl 2 O 4 ) hosts were successfully prepared at a relatively low temperature (~80 °C) using the…”
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Role of swift heavy ions irradiation on the emission of boron doped ZnO thin films for near white light application by Kumar, Vinod, Kumar, Vijay, Som, S., Purohit, L.P., Ntwaeaborwa, O.M., Swart, H.C.

“…[Display omitted] •ZnO:B thin film irradiated by 80MeV Br6+ ions.•Compressive to tensile stress was observed with increase in fluences.•Oxygen related defect…”
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Synthesis, spectral and surface investigation of NaSrBO3: Sm3+ phosphor for full color down conversion in LEDs by Kumar, Vinay, Bedyal, A.K., Pitale, Shreyas S., Ntwaeaborwa, O.M., Swart, H.C.

“…► Suitability of present phosphors as a down conversion phosphor to fill the “yellow gap” has been explored. ► Special attention was given to check its utility…”
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Afterglow enhancement with In3+ codoping in CaTiO3:Pr3+ red phosphor by Noto, L.L., Pitale, S.S., Gusowki, M.A., Terblans, J.J., Ntwaeaborwa, O.M., Swart, H.C.

“…CaTiO3:Pr3+ phosphor with a single red emission peak of around 613nm was co-doped with In3+ to charge compensate in the lattice sites where a trivalent ion…”
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Effects of particle morphology of ZnO buffer layer on the performance of organic solar cell devices by Mbule, P.S., Kim, T.H., Kim, B.S., Swart, H.C., Ntwaeaborwa, O.M.

“…The performance of poly(3-hexyltheopene):[6,6]-phenyl C61-butyric acid methyl ester or P3HT:PCBM based organic solar cell (OSC) devices can be improved by…”
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High efficiency energy transfer in Ce,Tb co-doped silica prepared by sol-gel method by Seed Ahmed, H.A.A., Ntwaeaborwa, O.M., Kroon, R.E.

“…Amorphous Ce,Tb co-doped silica (SiO2) was prepared using the sol-gel method with the aim of studying the energy transfer from Ce to Tb ions. It was initially…”
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Spectral and surface investigations of Mn2+ doped SrZnO2 nanocrystalline phosphors by Bedyal, A. K., Kumar, Vinay, Sharma, Vishal, Pitale, S. S., Coetsee, E., Duvenhage, M. M., Ntwaeaborwa, O. M., Swart, H. C.

“…A yellow light-emitting SrZnO 2 :Mn 2+ nanophosphor was synthesized through a combustion process using metal nitrates as precursors and urea as fuel. The…”
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Synthesis and characterization of BaAl2O4:Eu2+ co-doped with different rare earth ions by Lephoto, M.A., Ntwaeaborwa, O.M., Pitale, Shreyas S., Swart, H.C., Botha, J.R., Mothudi, B.M.

“…Combustion method was used in this study to prepare BaAl2O4:Eu2+ phosphors co-doped with different trivalent rare-earths (Re3+=Dy3+, Nd3+, Gd3+, Sm3+, Ce3+,…”
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Synthesis, Thermal and Spectroscopic Characterization of Caq2 (Calcium 8-Hydroxyquinoline) Organic Phosphor by Nagpure, I. M., Duvenhage, M. M., Pitale, Shreyas S., Ntwaeaborwa, O. M., Terblans, J. J., Swart, H. C.

“…Bluish-green photoluminescence from calcium 8-hydroxyquinolate (Caq 2 ) powder, synthesized by a co-precipitation route, and a blended Caq 2 :PMMA thin film is…”
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Phosphorescent and thermoluminescent properties of SrAl2O4:Eu2+, Dy3+ phosphors prepared by solid state reaction method by Mothudi, B.M., Ntwaeaborwa, O.M., Kumar, A., Sohn, K., Swart, H.C.

“…Long persistent SrAl2O4:Eu2+ phosphors co-doped with Dy3+ were prepared by the solid state reaction method. The main diffraction peaks of the monoclinic…”
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Cathodoluminescent stability of rare earth tantalate phosphors by Noto, L.L., Pitale, S.S., Ntwaeaborwa, O.M., Terblans, J.J., Swart, H.C.

“…Surface chemical changes were probed on the surface of YTaO4:Pr3+ (0.5mol%) and LaTaO4:Pr3+ (0.5mol%) phosphors that were prepared by solid state reaction at…”
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Highly selective NH3 gas sensor based on Au loaded ZnO nanostructures prepared using microwave-assisted method by Shingange, K., Tshabalala, Z.P., Ntwaeaborwa, O.M., Motaung, D.E., Mhlongo, G.H.

“…[Display omitted] ZnO nanorods synthesized using microwave-assisted approach were functionalized with gold (Au) nanoparticles. The Au coverage on the surface…”
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Luminescence characterization and electron beam induced chemical changes on the surface of ZnAl2O4:Mn nanocrystalline phosphor by Pitale, Shreyas S., Kumar, Vinay, Nagpure, I.M., Ntwaeaborwa, O.M., Swart, H.C.

“…▶ Stable green cathodoluminescence (CL) obtained under low voltage electron beam excitation. ▶ Auger and XPS probed chemical changes on the surface of the…”
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PL and CL degradation and characteristics of SrAl2O4: Eu2+,Dy3+ phosphors by Swart, H.C., Terblans, J.J., Ntwaeaborwa, O.M., Kroon, R.E., Mothudi, B.M.

“…Strontium aluminate phosphors are ideal for luminescent infrastructure materials. Their brightness and persistent glow time are much higher than previously…”
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Role of silver doping on the defects related photoluminescence and antibacterial behaviour of zinc oxide nanoparticles by Kumar, Vinod, Prakash, Jai, Singh, Jitendra Pal, Chae, Keun Hwa, Swart, C., Ntwaeaborwa, O.M., Swart, H.C., Dutta, Viresh

“…[Display omitted] •Ag doped ZnO.•Antibacterial study.•XANES and XPS analysis. The Ag doped ZnO (ZnO:Ag) NPs with a hexagonal wurtzite structure were…”
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