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Soc. open sci."],"published-print":{"date-parts":[[2022,6]]},"abstract":"<jats:p>\n            The\n            <jats:italic>\u03c4<\/jats:italic>\n            -phase Ba\n            <jats:sub>1.3<\/jats:sub>\n            Ca\n            <jats:sub>\n              0.7-\n              <jats:italic>x<\/jats:italic>\n              -\n              <jats:italic>y<\/jats:italic>\n            <\/jats:sub>\n            SiO\n            <jats:sub>4<\/jats:sub>\n            :\n            <jats:italic>x<\/jats:italic>\n            D\n            <jats:italic>y<\/jats:italic>\n            <jats:sup>3+<\/jats:sup>\n            \/\n            <jats:italic>y<\/jats:italic>\n            Tb\n            <jats:sup>3+<\/jats:sup>\n            phosphors co-doped with D\n            <jats:italic>y<\/jats:italic>\n            <jats:sup>3+<\/jats:sup>\n            (\n            <jats:italic>x<\/jats:italic>\n            = 0.03) and Tb\n            <jats:sup>3+<\/jats:sup>\n            (\n            <jats:italic>y<\/jats:italic>\n            = 0.01\u20130.05) trivalent rare-earth ions were prepared by the gel-combustion method. The structure\u2013property relation of the samples was examined by X-ray diffraction, scanning electron microscopy and spectrophotometer. Here, the effect of Tb\n            <jats:sup>3+<\/jats:sup>\n            's concentration on the spectroscopic properties of Ba\n            <jats:sub>1.3<\/jats:sub>\n            Ca\n            <jats:sub>\n              0.7-\n              <jats:italic>x<\/jats:italic>\n              -\n              <jats:italic>y<\/jats:italic>\n            <\/jats:sub>\n            SiO\n            <jats:sub>4<\/jats:sub>\n            :\n            <jats:italic>x<\/jats:italic>\n            D\n            <jats:italic>y<\/jats:italic>\n            <jats:sup>3+<\/jats:sup>\n            \/\n            <jats:italic>y<\/jats:italic>\n            Tb\n            <jats:sup>3+<\/jats:sup>\n            phosphors was explored by using the photoluminescence excitation, emission and decay curves. Importantly, the photonic energy transfer from (D\n            <jats:italic>y<\/jats:italic>\n            <jats:sup>3+<\/jats:sup>\n            :\n            <jats:sup>4<\/jats:sup>\n            F\n            <jats:sub>9\/2<\/jats:sub>\n            + Tb\n            <jats:sup>3+<\/jats:sup>\n            :\n            <jats:sup>7<\/jats:sup>\n            F\n            <jats:sub>6<\/jats:sub>\n            ) to (D\n            <jats:italic>y<\/jats:italic>\n            <jats:sup>3+<\/jats:sup>\n            :\n            <jats:sup>6<\/jats:sup>\n            H\n            <jats:sub>15\/2<\/jats:sub>\n            + Tb\n            <jats:sup>3+<\/jats:sup>\n            :\n            <jats:sup>5<\/jats:sup>\n            D\n            <jats:sub>4<\/jats:sub>\n            ) was observed, in which the D\n            <jats:italic>y<\/jats:italic>\n            <jats:sup>3+<\/jats:sup>\n            ions act as a light-emitting donor whereas the Tb\n            <jats:sup>3+<\/jats:sup>\n            ions as a light-absorbing acceptor, resulting in an enhanced emission from the co-doped Ba\n            <jats:sub>1.3<\/jats:sub>\n            Ca\n            <jats:sub>\n              0.7-\n              <jats:italic>x<\/jats:italic>\n              -\n              <jats:italic>y<\/jats:italic>\n            <\/jats:sub>\n            SiO\n            <jats:sub>4<\/jats:sub>\n            :\n            <jats:italic>x<\/jats:italic>\n            D\n            <jats:italic>y<\/jats:italic>\n            <jats:sup>3+<\/jats:sup>\n            \/\n            <jats:italic>y<\/jats:italic>\n            Tb\n            <jats:sup>3+<\/jats:sup>\n            (\n            <jats:italic>x<\/jats:italic>\n            = 0.03 and\n            <jats:italic>y<\/jats:italic>\n            = 0.01\u20130.05) phosphors. Finally, the chromaticity coordinates were determined from the measured emission spectra, locating at the green and white light regions. This observation indicates that the characteristic emission colour could be tuned from white to green by varying Tb\n            <jats:sup>3+<\/jats:sup>\n            concentrations under ultraviolet light.\n          <\/jats:p>","DOI":"10.1098\/rsos.220101","type":"journal-article","created":{"date-parts":[[2022,6,15]],"date-time":"2022-06-15T07:06:39Z","timestamp":1655276799000},"update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":6,"title":["Photoluminescence processes in\n            <i>\u03c4<\/i>\n            -phase Ba\n            <sub>1.3<\/sub>\n            Ca\n            <sub>\n              0.7-\n              <i>x<\/i>\n              -\n              <i>y<\/i>\n            <\/sub>\n            SiO\n            <sub>4<\/sub>\n            :\n            <i>x<\/i>\n            D\n            <i>y<\/i>\n            <sup>3+<\/sup>\n            \/\n            <i>y<\/i>\n            Tb\n            <sup>3+<\/sup>\n            phosphors for solid-state lighting"],"prefix":"10.1098","volume":"9","author":[{"given":"Desta R.","family":"Golja","sequence":"first","affiliation":[{"name":"Department of Materials Science and Engineering, Jimma Institute of Technology, Jimma University, P.O. Box 378, Jimma, Ethiopia"},{"name":"Department of Physics, University of the Free State (QwaQwa Campus), P.O. Box 339, Bloemfontein, South Africa"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Menberu M.","family":"Woldemariam","sequence":"additional","affiliation":[{"name":"Department of Physics, Jimma University, P.O. Box 378, Jimma, Ethiopia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Francis B.","family":"Dejene","sequence":"additional","affiliation":[{"name":"Department of Chemical and Physical Sciences, Walter Sisulu University (Mthatha Campus), Private Bag XI UNITRA 5117, South Africa"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7736-6858","authenticated-orcid":true,"given":"Jung Yong","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia"},{"name":"Center of Advanced Materials Science and Engineering, Adama Science and Technology University, P.O. 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