摘要
利用高温固相法合成了Eu2+掺杂的新型蓝色硼硅酸盐发光玻璃,讨论了不同掺杂浓度下硼硅酸镁玻璃体系中Eu—O键共价性的变化以及氧原子周围不同配位环境对MgO-SiO2-B2O3玻璃发光性能的影响。利用X射线衍射仪和荧光光谱仪对该玻璃体系进行了结构表征和性能测试。在紫外-可见光激发下,Eu2+掺杂硼硅酸镁玻璃的荧光发射光谱明显出现一个较为宽泛的发射谱带。
During the recent decade＇s years, the luminescence properties of divalent europium have attracted more and more interest for its wide emission spectrum ranging from blue to blue-green. As for the rare earth optical glass , the rare earth ion dopants with high brightness and stable performance are always the important point, and Eu^2＋ doped borosilicate glasses also have these properties. Herein, by using the high-temperature solid-phase synthesis method, a typical blue borosilicate glass named MgO · SiO2· B2O3： Eu^2＋ was synthesized. The influence of different Eu^2＋ doped concentrations on the luminescent properties of borosilicate glass was studied. X-ray diffraction and luminescence spectroscopy were used to characterize this glass samples. Excited by the UV light, the emission spectrum of the glass phosphor consists of two bands, peaking at about 460 nm and 500 nm, which are attributed to the covalence property of the Eu--O bond and the different coordination environments around the Eu^2＋ ions in the host lattice. The energy transfer process is accompanied by the loss of energy. In addition, with the concentration of divalent europium ions increasing, fluorescence quenching occurred, so emission intensity of the 500 nm emission band is weaken. The glass phosphor has strong excitation at around 300 -440 nm and emitted a typical bright blue luminescence. And with the mole fraction of doped Eu^2＋ increasing, the peak of emission spectrum shows a red shift, and the intensity remarkably decreased. Thus it could have applications as a blue component in solid-state lighting devices assembled by near-UV light emitting diodes （LED） and with tricolor phosphors.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2011年第2期149-153,共5页
Chinese Journal of Luminescence
基金
中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室科研项目(SKL200912SIC)资助
关键词
蓝光
稀土
硼硅酸盐玻璃
blue emissioin
rare earth
borasilicate glass
