摘要
研究了不同Eu掺杂浓度对Sr2Al6O11基磷光体发光性能的影响.结果发现,当Eu掺杂浓度低于0.01mol时,在其发射光谱中存在403和493nm的主发射峰,对应着Sr2Al6O11基质中Sr的两种不同位置Sr1和Sr2位.随着Eu掺杂浓度增加,由于能量传递作用,导致403nm的发射峰消失,493nm的发射峰增强.余辉衰减曲线表明,未掺杂Dy的磷光体没有余辉性能,当Eu掺杂量在0.01mol时,余辉性能最好.进一步提高Eu的掺杂量,由于浓度猝灭作用,导致发光性能下降.
The effects of different doping concentration of Eu2+ on the properties of Sr2Al6O11-based phosphor were studied. The results indicate that there are two main emission peaks at 403nm and 493nm existing, in the phosphor, while the doping concentration of Eu2+ is below 0.01mol, which are corresponding to various, Sr1 and Sr2 sites in the Sr2Al6O11 matrix. While increasing the doping concentration of Eu2+, the emission peak of 403nm disappears and the peak of 493nm becomes strong simultaneously due to the energy transfer. between the different Eu2+ centers. Decay curves imply that. the phosphor without co-doping Dy3+ has no long afterglow properties. When the doping concentration of Eu2+ is 0.01mol, the long afterglow is the best in three experimental samples with different Eu2+ contents. The luminescent properties will decrease while increasing the doping concentration of Eu2+ due to the concentration quenching.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第1期225-228,共4页
Journal of Inorganic Materials
