Luminescence and Energy Transfer Characteristics of Tb3+- and Ce3+-Codoped BaBPO5 Phosphors

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概要

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• 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 230 nm. The emissions can be assigned to various $\text{$^{5}$D$_{4}$}\rightarrow\text{$^{7}$F$_{J}$}$ ($J=3$, 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 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.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2006-04-15

著者

• Lu Chung-Hsin

  Electronic and Electro-optical Ceramics Laboratory, Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.

• Lu Chung-Hsin

  Electronic and Electro-optical Ceramics Laboratory, Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan, R.O.C.

• Godbole Shrikant

  Electronic and Electro-optical Ceramics Laboratory, Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan, R.O.C.

• Qureshi Mohammad

  Electronic and Electro-optical Ceramics Laboratory, Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan, R.O.C.

関連論文

• Ferroelectric Lead Zirconate Titanate Thin Films Synthesized via a High-Pressure Crystallization Process
• Synthesis and Characterization of B2O3-Doped Zinc Oxide Thin Films Prepared via RF-Magnetron Sputtering
• Luminescence and Energy Transfer Characteristics of Tb3+- and Ce3+-Codoped BaBPO5 Phosphors

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