Luminescence enhancement by energy transfer from Ce³⁺ ions in Ba₁.₆Ca₀.₄P₂O₇:Ce³⁺:Tb³⁺ phosphor

• Published in: Current applied physics Vol. 12; no. 1; pp. 299 - 302
• Main Authors: Zhang, Xin-min, Li, Wen-lan, Jang, Kyoung Hyuk, Seo, Hyo Jin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2012; 한국물리학회
• Subjects: energy efficiency; energy transfer; ions; optical properties; photoluminescence; spectroscopy; temperature; wavelengths; 물리학
• ISSN: 1567-1739; 1878-1675
• DOI: 10.1016/j.cap.2011.06.024

The optical properties of Ba₁.₆Ca₀.₄P₂O₇ doped with Ce³⁺ and Tb³⁺ are investigated. Under excitation at 280 nm the emission spectrum of Ba₁.₆Ca₀.₄P₂O₇:Ce³⁺ consists of a peak at 370 nm and a shoulder at the longer wavelength side. The emission spectra of Ba₁.₆Ca₀.₄P₂O₇:Tb³⁺ shows the well-known emission lines due to ⁵D₄–⁷FJ transitions of Tb³⁺. The green emissions of Tb³⁺ ions are enhanced upon UV excitation through energy transfer from Ce³⁺ to Tb³⁺ ions. The efficiency of such an energy transfer is estimated based on spectroscopic data. The dependence of photoluminescence (PL) intensities of Ce³⁺ and Tb³⁺ emissions on Ce³⁺ or Tb³⁺ concentrations in the systems (Ba₁.₆Ca₀.₄P₂O₇:0.04Ce³⁺,xTb³⁺ and Ba₁.₆Ca₀.₄P₂O₇:xCe³⁺,0.04Tb³⁺) and the temperature dependence of PL emission spectra of Ba₁.₆Ca₀.₄P₂O₇:0.06Ce³⁺,0.04Tb³⁺ is also investigated.