| High efficiency energy transfer in Ce, Tb co-doped silica prepared by sol-gel method HAAS Ahmed, OM Ntwaeaborwa, RE Kroon Journal of luminescence 135, 15-19, 2013 | 45 | 2013 |
| Effect of Ga3+ doping on the photoluminescence properties of Y3Al5-xGaxO12: Bi3+ phosphor A Yousif, V Kumar, HAAS Ahmed, S Som, LL Noto, OM Ntwaeaborwa, ... ECS Journal of Solid State Science and Technology 3 (11), R222, 2014 | 44 | 2014 |
| Luminescence properties of Bi doped La2O3 powder phosphor BM Jaffar, HC Swart, HAAS Ahmed, A Yousif, RE Kroon Journal of Luminescence 209, 217-224, 2019 | 36 | 2019 |
| The energy transfer mechanism in Ce, Tb co-doped LaF3 nanoparticles HAAS Ahmed, OM Ntwaeaborwa, RE Kroon Current applied physics 13 (7), 1264-1268, 2013 | 27 | 2013 |
| Ce decay curves in Ce, Tb co-doped LaF3 and the energy transfer mechanism RE Kroon, HC Swart, OM Ntwaeaborwa, HAAS Ahmed Physica B: Condensed Matter 439, 83-87, 2014 | 20 | 2014 |
| Luminescence and electron degradation properties of Bi doped CaO phosphor A Yousif, RE Kroon, E Coetsee, OM Ntwaeaborwa, HAAS Ahmed, ... Applied Surface Science 356, 1064-1069, 2015 | 19 | 2015 |
| Stability of Bi doped La2O3 powder phosphor and PMMA composites BM Jaffar, HC Swart, HAAS Ahmed, A Yousif, RE Kroon Journal of Physics and Chemistry of Solids 131, 156-163, 2019 | 18 | 2019 |
| 5D3→ 7FJ emission of Tb doped sol–gel silica HAAS Ahmed, OM Ntwaeaborwa, MA Gusowski, JR Botha, RE Kroon Physica B: Condensed Matter 407 (10), 1653-1655, 2012 | 17 | 2012 |
| Luminescence from Ce in sol–gel SiO2 RE Kroon, HAAS Ahmed, OM Ntwaeaborwa, LF Koao, IM Nagpure, ... Physica B: Condensed Matter 407 (10), 1595-1598, 2012 | 16 | 2012 |
| Photoluminescence, thermoluminescence, and cathodoluminescence of optimized cubic Gd2O3: Bi phosphor powder MHM Abdelrehman, RE Kroon, A Yousif, HAA Seed Ahmed, HC Swart Journal of Vacuum Science & Technology A 38 (6), 2020 | 12 | 2020 |
| Luminescence properties and cathodoluminescence degradation of Bi doped SrO powder MHM Abdelrehman, RE Kroon, A Yousif, HAA Seed Ahmed, HC Swart Journal of Vacuum Science & Technology B 37 (1), 2019 | 12 | 2019 |
| Cathodoluminescence degradation of Bi doped La2O3 and La2O2S phosphor powders BM Jaffar, HC Swart, HAAS Ahmed, A Yousif, RE Kroon Physica B: Condensed Matter 574, 411659, 2019 | 11 | 2019 |
| Optical properties and stability of Bi doped La2O2S BM Jaffar, HC Swart, HAAS Ahmed, A Yousif, RE Kroon Optical Materials 95, 109260, 2019 | 10 | 2019 |
| Concentration quenching of Eu2+ doped Ca2BO3Cl HAAS Ahmed, HC Swart, P Bergman, RE Kroon Materials Research Bulletin 75, 47-50, 2016 | 9 | 2016 |
| Comparative study of the luminescence of Bi doped LaOCl and LaOBr phosphor powders BM Jaffar, HC Swart, HAAS Ahmed, A Yousif, RE Kroon Journal of Luminescence 250, 119050, 2022 | 7 | 2022 |
| Interaction mechanism for energy transfer from Ce to Tb ions in silica HAAS Ahmed, WS Chae, OM Ntwaeaborwa, RE Kroon Physica B: Condensed Matter 480, 100-104, 2016 | 6 | 2016 |
| Effect of background atmosphere and substrate temperature on SrO: Bi3+ (0.2 mol%) thin films produced using pulsed laser deposition with different lasers MHM Abdelrehman, V Craciun, RE Kroon, A Yousif, HAAS Ahmed, ... Physica B: Condensed Matter 581, 411757, 2020 | 4 | 2020 |
| Luminescence of alternating SiO2: Tb and SiO2: Ce thin films produced by sol-gel spin coating HAAS Ahmed, A Yousif, HC Swart, RE Kroon Materials Today: Proceedings 2 (7), 4111-4117, 2015 | 4 | 2015 |
| Luminescence properties of Bi doped LaOF phosphor powder BM Jaffar, HC Swart, HAAS Ahmed, A Yousif, RE Kroon Optical Materials 135, 113367, 2023 | 3 | 2023 |
| Effect of annealing on the Ce3+/Ce4+ ratio measured by XPS in luminescent SiO2:Ce REK HAA Seed Ahmed, WD Roos, OM ntwaeborwa, HC Swart South African Institute of Physics, 280 - 284, 2011 | 3* | 2011 |
