发光学报, 2017, 38 (11): 1429, 网络出版: 2017-12-25   

通过改变基质阳离子半径使O2-→Eu3+电荷迁移带红移

Red shift of 2-→Eu3+ Charge Transfer Band by Changing The Host Cationic Radiu
作者单位
1 吉林建筑大学 材料科学与工程学院, 吉林 长春 130118
2 中国科学院长春应用化学研究所 稀土资源利用国家重点实验室, 吉林 长春 130022
摘要
采用高温固相法在1 300 ℃合成了A0.98Nb2O6∶Eu0.02(A=Ca,Sr,Ba)荧光粉。X射线衍射(XRD)的结果表明烧结后得到的产物为纯相。利用稳态荧光光谱(PL)和漫反射光谱(DRS)对A0.98Nb2O6∶Eu0.02(A=Ca,Sr,Ba)的发光性质进行了研究。结果表明A0.98Nb2O6∶Eu0.02(A=Ca,Sr,Ba)荧光粉可以发射Eu3+的特征红光, 光强度按CaNb2O6>SrNb2O6>BaNb2O6从大到小排列。激发光谱中可以观察到Eu3+离子的电荷转移跃迁(CT)和f-f跃迁吸收。其中CT吸收峰因基质阳离子半径的增大而发生了较大程度的红移, 从270 nm红移到了330 nm。
Abstract
The phosphors with general molecular formula A0.98Nb2O6∶Eu0.02(A=Ca, Sr, Ba) were prepared by the high-temperature solid state reaction technique. X-ray diffraction (XRD) results reveal that the obtained products are pure phase. The luminescence properties of A0.98Nb2O6∶Eu0.02(A=Ca, Sr, Ba) were investigated by photoluminescence spectra(PL) and diffuse reflection spectra(DRS). A0.98Nb2O6∶Eu0.02(A=Ca, Sr, Ba) phosphors can exhibit the characteristic red emission of Eu3+, and PL intensities of A0.98Nb2O6∶Eu0.02are in the order of CaNb2O6>SrNb2O6>BaNb2O6. The charge transfer transition(CT) and f-f transition absorption of Eu3 + can be observed in the excitation spectra. With the increase of the host cationic radius, the CT band shows large red shift from 270 to 330 nm.
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王洪杰, 吕玲玲, 张粟, 冯婧, 庞然, 姜丽宏, 李达, 李成宇. 通过改变基质阳离子半径使O2-→Eu3+电荷迁移带红移[J]. 发光学报, 2017, 38(11): 1429. WANG Hong-jie, LYU Ling-ling, ZHANG Su, FENG Jing, PANG Ran, JIANG Li-hong, LI Da, LI Cheng-yu. Red shift of 2-→Eu3+ Charge Transfer Band by Changing The Host Cationic Radiu[J]. Chinese Journal of Luminescence, 2017, 38(11): 1429.

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