Luminescence and energy transfer characteristics of Tb3+- and Ce3+-codoped BaBPO5 phosphors

被引：19
作者：
Lu, CH [1 ]
Godbole, SV [1 ]
Qureshi, M [1 ]
机构：
[1] Natl Taiwan Univ, Dept Chem Engn, Elect & Electroopt Ceram Lab, Taipei 10764, Taiwan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2006年 / 45卷 / 4A期
关键词：
phosphors; BaBPO5; luminescence properties; energy transfer;
D O I：
10.1143/JJAP.45.2606
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The 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:Tb3+ phosphors exhibit intense green emissions upon excitation at 230nm. The emissions can be assigned to various D-5(4) -> F-7(J) (J = 31 4, 5, and 6) transitions of Tb3+ ions. Excitation in the 200-230 rim 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 Ce3+ 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 Tb3+, Ce3+, and Na+ ions in the BaBPO5 host have potential for applications as green phosphors for tricolor lamps.
引用
收藏
页码：2606 / 2611
页数：6
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