Lu C.-H.Godbole S.V.Qureshi M.2019-05-132019-05-13200600214922https://scholars.lib.ntu.edu.tw/handle/123456789/407448The luminescence properties of barium borate phosphate phosphors doped with trivalent terbium ions and the effects of codoping cerium and sodium ions on their emission characteristics were investigated. BaBPO5:Tb 3+ phosphors exhibit intense green emissions upon excitation at 230 nm. The emissions can be assigned to various 5D4 ¡÷ 7FJ (J = 3, 4, 5, and 6) transitions of Tb3+ ions. Excitation in the 200-230 nm range in BaBPO5:Tb3+ is ascribed to spin-allowed transitions. The relatively weak excitation band at 268 nm is attributed to spin-forbidden transitions. The codoping of Ce 3+ ions along with Tb3+ in BaBPO5 results in Tb3+ emissions and the quenching of Ce3+ emissions. Energy transfer from Ce3+ ions to Tb3+ ions increases with an increase in Ce3+ content. The codoping of sodium ions in terbium and cerium ions-doped BaBPO5 phosphors leads to luminescence enhancement. This enhancement is attributed to the reduction in non-radiative losses. These investigations reveal that the phosphors containing Tb 3+, Ce3+, and Na+ ions in the BaBPO 5 host have potential for applications as green phosphors for tricolor lamps. ? 2006 The Japan Society of Applied Physics.BaBPO5Energy transferLuminescence propertiesPhosphors[SDGs]SDG7journal article10.1143/JJAP.45.26062-s2.0-33645720097https://www.scopus.com/inward/record.uri?eid=2-s2.0-33645720097&doi=10.1143%2fJJAP.45.2606&partnerID=40&md5=a4adb7081c08cbaef98dbf4aec4487c1