摘要
荧光玻璃具有发光中心分布均匀和热稳定好等优点,成为LED领域研究的热点。本研究采用传统的高温熔融淬火法合成了一系列Eu^(3+)掺杂的硼酸盐玻璃,通过荧光光谱手段对其发光性质及热稳定性进行了表征;利用Van Uitert模型对样品中Eu^(3+)的浓度猝灭行为进行了研究。结果表明:样品中Eu^(3+)的浓度猝灭机理为Eu^(3+)离子间的交换作用导致的无辐射能量传递;利用Arrhenius公式对荧光玻璃样品的温度猝灭行为进行了分析。结果表明:样品中Eu^(3+)的发光温度猝灭属于Crossover过程;最后分析了Eu^(3+)与荧光玻璃基质之间的相互作用。
Fluorescent glass has advantages of homogeneous light emission, excellent thermal stability, and stable product quality as compared with traditional phosphors. Therefore, fluorescent glass in the field of LED has become a research hot spot in recent years. In this paper, Eu^3＋ doped borate glasses were synthesized via the conventional melt-quenching technique. The luminescence properties and thermal stability of the fluorescent glass samples were characterized by fluorescence spectra. The doping concentration of RE^（3＋） ions is an important factor influencing the samples＇ luminescent performance. Based on the Van Uitert model, concentration quenching behavior for the prepared glass samples was studied. It is found that the fluorescence quenching of the samples is attributed to the nonradiative energy transfer through cross-relaxation mechanism between energy levels of Eu^3＋. As is known to all, the temperature dependence of fluorescence glass＇ luminescence is also important to the practical applications. The temperature quenching mechanism for the prepared glass samples was analyzed by Arrhenius model, and it was found that the temperature quenching could be ascribed to the crossover model. The activation energy for the prepared glass samples is obtained from fitting processes which is found to be（0.35±0.04） e V. The interaction between Eu^3＋ ion and glass host was also analyzed. The result shows that the interaction between Eu^3＋ ions and the glass host is weak coupling.
作者
闫绍峰
吴中立
吴红梅
廖国进
李煜
刘通
赵莘彬
YAN Shao-Feng WU Zhong-Li WU Hong-Mei LIAO Guo-Jin LI Yu LIU Tong ZHAO Xin-Bin(Faculty of Mechanical Engineering and Automation, Liaoning University of Technology, Jinzhou 121001, China School of Chemical and Environmental Engineering, Liaoning University of Technology, Jinzhou 121001, China)
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2017年第7期765-769,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(21601075)
辽宁工业大学博士启动基金(X2016004)~~
关键词
发光性质
浓度猝灭
温度猝灭
luminescent properties
concentration quenching
temperature quenching
