Luminescence and thermal-quenching properties of Dy³⁺-doped Ba₂CaWO₆ phosphors

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• 作者：Ruijin Yu^a ; ^c ; Dong Soo Shin^b ; Kiwan Jang^c ; ^{kwjang@changwon.ac.kr" class="auth_mail} ; Yue Guo^d ; Hyeon Mi Noh^d ; Byung Kee Moon^d ; Byung Chun Choi^d ; Jung Hyun Jeong^d ; ^{jhjeong@pknu.ac.kr" class="auth_mail} ; Soung Soo Yi^e
• 关键词：Luminescence ; Ba2CaWO6 ; Dy3+ ; Phosphor ; Tungstate
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：5 May, 2014
• 年：2014
• 卷：125
• 期：Complete
• 页码：458-462
• 全文大小：1381 K

文摘

A series of new double perovskite tungstate Ba₂CaWO₆:xDy³⁺ (0.01 猢?#xA0;x 猢?#xA0;0.15) phosphors were synthesized via solid state reaction process. XRD analysis confirmed the phase formation of Ba₂CaWO₆:Dy³⁺ materials. The photoluminescence excitation and emission spectra, concentration effect, thermal-quenching, and decay property were investigated. The phosphor could be excited by the UV light region from 250 to 400 nm, and it exhibits blue (493 nm) and yellow (584 nm) emission corresponding to ⁴F_9/2-⁶H_15/2 transitions and ⁴F_9/2-⁶H_13/2 transitions, respectively. The optimum dopant concentration of Dy³⁺ ions in Ba₂CaWO₆:xDy³⁺ is around 5 mol% and the critical transfer distance of Dy³⁺ is calculated as 14 脜. The thermal-quenching temperature is 436 K for Ba₂CaWO₆:0.05Dy³⁺. The fluorescence lifetime is also determined in Ba₂CaWO₆:0.05Dy³⁺.