Hong, Ji Ho Lee, Ja Yeon Kang, Ji Ho Lee, Joon Yup Jang, Ho Seong Cho, Seong-Yong Kim, Dong Hun 2024-01-19T11:00:26Z 2024-01-19T11:00:26Z 2022-11-04 2022-11 0272-8842 https://pubs.kist.re.kr/handle/201004/114412 The development of highly efficient and stable red phosphors fabricated using cost-effective and simple mass -production methods is essential for applications in future displays and lighting devices. Herein, we investigate the phase formation, microstructures, and luminescence properties of Sr3Al2O6:Eu powders synthesized using a solid-state reaction process. Single-phase Sr3Al2O6:Eu phosphors exhibiting excellent photoluminescence with color-tunable orange-red and red colors under different excitation wavelengths were successfully synthesized. The optimal Eu doping concentration of Sr3Al2O6, yielding strong photoluminescence with phase stability, was 5 at. %, with the concentration quenching point determined by systematic exploration. The addition of H3BO3 as a flux significantly affected the grain size and improved the emission intensity of the synthesized (Sr0.95Eu0.05)3Al2O6 phosphors up to 12.5 wt %, while secondary phases were formed at higher flux concen-trations. The photoluminescence intensities of the 5D0 -> 7F1 and 5D0 -> 7F2 transitions of 12.5 wt % H3BO3 added (Sr0.95Eu0.05)3Al2O6 increased by 3.4 and 4.2 times compared with the flux-free powders under the 394 nm-wavelength excitation, while the decay time decreased from 7.35 to 5.40 ms. Our report of the enhanced pho-toluminescence intensity and shortened decay time of (Sr0.95Eu0.05)3Al2O6 phosphors following the flux addition is promising for production of single-phase phosphors emitting multi-colors, which is needed for optical devices activated by various excitation frequencies. English Pergamon Press Ltd. Microstructure and photoluminescence of Eu-doped Sr3Al2O6 phosphors calcined with and without H3BO3 flux Article 10.1016/j.ceramint.2022.07.216 1 Ceramics International, v.48, no.22, pp.32886 - 32893 Ceramics International 48 22 32886 32893 N scie scopus 000869665500003 Materials Science, Ceramics Materials Science Article RED-EMITTING PHOSPHOR LUMINESCENT PROPERTIES ENERGY-TRANSFER WHITE-LEDS BEHAVIOR B2O3 NA CA Solid-state reaction synthesis Oxide based phosphors Eu-doped strontium aluminates Europium oxide Boric acid flux Decay time