Synthesis of SrLu₂O₄:Eu²⁺ red phosphors and their photoluminescence properties

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• 作者：Kyeong-Ho Kim^a ; Eun-Hee Kang^a ; Bo-Kyung Kang^b ; Kyung Pil Kim^b ; Seong-Hyeon Hong^a ; ^{shhong@snu.ac.kr}
• 关键词：Phosphor ; Luminescence ; White light-emitting diode ; SrLu2O4 ; Eu2+
• 刊名：Journal of Luminescence
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：183
• 期：Complete
• 页码：13-16
• 全文大小：840 K
• 卷排序：183

文摘

New red-emitting Eu2+-doped SrLu2O4 phosphors were synthesized by a solid state reaction, and the effects of starting material composition, annealing temperature, and Eu2+ doping concentration on the phase formation and photoluminescence (PL) properties were investigated. A single phase SrLu2O4:Eu2+ phosphor was obtained between 1400 and 1500 °C in Sr-rich condition under 5% H2/N2 atmosphere. As-synthesized SrLu2O4:Eu2+ phosphors exhibited a strong red emission centered at 610 nm under the excitation of λex=450 nm. The highest emission intensity was observed in 0.004 mol Eu-substituted composition, which was ~85% compared to that of commercial (Sr,Ca)AlSiN3:Eu2+ phosphor. SrLu2O4:Eu2+ phosphors showed a strong thermal quenching, which suggests a high potential as an optical temperature sensor.