颜色可调的Li6Gd(BO3)3:Ce(3+), Tb(3+)荧光粉的发光与能量转移
Luminescence and energy transfer of color-tunable Li6Gd(BO3)3:Ce(3+), Tb(3+) phosphor.
作者信息
Chen Peican, Mo Fuwang, Xia Siyu, Wang Guofang, Guan Anxiang, Zhou Liya
机构信息
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Oct 5;149:682-6. doi: 10.1016/j.saa.2015.04.108. Epub 2015 May 11.
A series of novel color-tunable phosphors of Ce(3+), Tb(3+)-codoped Li6Gd(BO3)3 was synthesized through a classic solid-state reaction. The color of these phosphors changes from blue to green by adjusting the ratio of Ce(3+) to Tb(3+). The photoluminescence properties of the synthesized phosphors were investigated, and several major emission bands that belong to Ce(3+) and Tb(3+) ions were irradiated with near ultraviolet light. Moreover, the energy transfer mechanism between Ce(3+) and Tb(3+) in Li6Gd(BO3)3 was explored. The photoluminescence decay curves were performed to validate the energy transfer. The analysis demonstrated that the energy transfer from Ce(3+) to Tb(3+) arose from dipole-dipole interaction with a critical distance of approximately 17.6 Å.
通过经典的固态反应合成了一系列铈（Ce(3+)）、铽（Tb(3+)）共掺杂的Li6Gd(BO3)3新型颜色可调磷光体。通过调整Ce(3+)与Tb(3+)的比例，这些磷光体的颜色从蓝色变为绿色。研究了合成磷光体的光致发光特性，并用近紫外光照射了属于Ce(3+)和Tb(3+)离子的几个主要发射带。此外，还探索了Li6Gd(BO3)3中Ce(3+)和Tb(3+)之间的能量转移机制。通过光致发光衰减曲线验证了能量转移。分析表明，Ce(3+)到Tb(3+)的能量转移源于偶极-偶极相互作用，临界距离约为17.6 Å。
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