Luminescence properties of dysprosium doped calcium magnesium silicate phosphor by solid state reaction method
Luminescence properties of dysprosium doped calcium magnesium silicate phosphor by solid state reaction method
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DOI：
10.1016/j.jallcom.2015.06.011
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发表时间：
2015-11
影响因子：
6.2
通讯作者：
I. P. Sahu;P. Chandrakar;R. Baghel;D. P. Bisen;N. Brahme;R. Tamrakar
中科院分区：
文献类型：
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作者：
I. P. Sahu;P. Chandrakar;R. Baghel;D. P. Bisen;N. Brahme;R. Tamrakar
采用固相反应法制备了掺镝钙镁硅酸盐(CaMgSi2O6：Dy3+)白光荧光粉。烧结后的荧光粉的晶体结构为单斜晶系，空间群为C2/c。用EDX分析了烧结后CaMgSi2O6：Dy3+荧光粉的化学成分。所制备的CaMgSi2O6：Dy3+荧光粉在352nm光激发下，由于Dy3+离子的the4F9/2→6H15/2，4F9/2→6H13/2，4F9/2→6H11/2transitions，在蓝(470 Nm)、黄(570 Nm)和红(675 Nm)处记录了相应的发射光谱。这三种发射的组合构成了白光，经国际L委员会(CIE)的色坐标图确认。探讨了白光长余辉发光材料CaMgSi2O6：Dy3+的可能机制。对余辉性能的研究表明，荧光粉具有快速和缓慢的衰减过程。机械发光强度峰值随活塞运动冲击速度的增加而线性增加。因此，本研究表明，在制备的CaMgSi2O6：Dy3+荧光粉中产生ML的原因是局域压电致电子轰击模型。
Dysprosium doped calcium magnesium silicate (CaMgSi2O6:Dy3+) white light emitting phosphor was synthesized by solid state reaction process. The crystal structure of sintered phosphor was monoclinic structure with space group C2/c. Chemical composition of the sintered CaMgSi2O6:Dy3+phosphor was confirmed by EDX. The prepared CaMgSi2O6:Dy3+phosphor was excited from 352 nm and their corresponding emission spectra were recorded at blue (470 nm), yellow (570 nm) and red (675 nm) line due to the4F9/2→6H15/2,4F9/2→6H13/2,4F9/2→6H11/2transitions of Dy3+ions. The combination of these three emissions constituted as white light confirmed by the Commission Internationale de L'Eclairage (CIE) chromatic coordinate diagram. The possible mechanism of the white light emitting long lasting CaMgSi2O6:Dy3+phosphor was also investigated. Investigation on afterglow property show that phosphor held fast and slow decay process. The peak of mechanoluminescence (ML) intensity increases linearly with increasing impact velocity of the moving piston. Thus the present investigation indicates that the local piezoelectricity-induced electron bombardment model is responsible to produce ML in prepared CaMgSi2O6:Dy3+phosphor.