新型K_2CaP_2O_7:Ce~(3+),Tb~(3+)蓝-绿色荧光粉的能量传递机理及其热稳定性能研究
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- 英文论文题名：The energy transfer and thermal stability of a blue-green color tunable K_2CaP_2O_7:Ce~(3+),Tb~(3+) phosphor
- 论文作者：丁一 ; 王鲁香 ; 徐梦姣 ; 贾殿赠
- 英文论文作者：Yi Ding ; Luxiang Wang ; Mengjiao Xu ; Dianzeng Jia ; Institute of Applied Chemistry ; Xinjiang University
- 年：2016
- 作者机构：新疆大学应用化学研究所;
- 论文关键词：稀土 ; 发光材料 ; 能量传递
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十七分会：光化学
- 语种：中文
- 分类号：TQ422
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十七分会 ; 光化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：2
- 文件大小：254k
- 原文格式：D
- 会议级别：全国
摘要
由于无机稀土发光材料具有发光强度高,发光谱带窄,性质稳定等优点,已被广泛应用于多种领域。本文采用传统高温固相法制备出新型Ce~(3+),Tb~(3+)共同掺杂的K_2Ca P_2O_7(KCPO)荧光粉,并采用X射线衍射、荧光光谱、衰减曲线、荧光热稳定性能测定对材料进行了相关表征。KCPO:Ce~(3+),Tb~(3+)的荧光光谱展现出Ce~(3+)和Tb~(3+)的特征激发和发射峰。通过改变KCPO:Ce~(3+),Tb~(3+)中Tb~(3+)离子的浓度,样品在紫外激发下可实现由蓝到绿的颜色变化。由寿命衰减曲线分析发现,这种变化是由于Ce~(3+)和Tb~(3+)之间存在有效的能量传递,其能量传递效率高达82.51%。通过计算,推导出能量传递的机理为偶极-偶四极相互作用。此外,在77K到673K的温度下,材料表现出优异的热稳定性能。综上特点,KCPO:Ce~(3+),Tb~(3+)用作近紫外光激发的蓝-绿色发光材料具有十分广阔的应用潜能。
Novel blue-green emitting Ce~(3+)- and Tb~(3+)-activated K_2 Ca P_2O_7(KCPO) phosphors were synthesized by a solid state reaction method. The X-ray diffraction, luminescence spectroscopy, decay time and fluorescent thermal stabilitytests have been used to characterize the obtained samples. The KCPO:Ce~(3+),Tb~(3+) luminescence spectra show broad emission band of Ce~(3+) ions and characteristic emission line of Tb~(3+) ion transition. The color variation of the light emitting from blue to green under UV excitation can be realized by tailoring the Tb~(3+) doping level in KCPO:Ce~(3+). Besides, Ce~(3+) ions obviously intensify Tb~(3+) ion emission through an efficient energy transfer process, which was confirmed from decay curves. The energy transfer efficiency was determined to be 82.51%. A resonant type mechanism via the dipole–quadrupole interaction can be proposed for energy transfer. As a whole, the KCPO:Ce~(3+),Tb~(3+) phosphor exhibits excellent performance in the temperature range from 77 K to 673 K, indicating the phosphors are promising candidates for solid-state lighting.
Novel blue-green emitting Ce~(3+)- and Tb~(3+)-activated K_2 Ca P_2O_7(KCPO) phosphors were synthesized by a solid state reaction method. The X-ray diffraction, luminescence spectroscopy, decay time and fluorescent thermal stabilitytests have been used to characterize the obtained samples. The KCPO:Ce~(3+),Tb~(3+) luminescence spectra show broad emission band of Ce~(3+) ions and characteristic emission line of Tb~(3+) ion transition. The color variation of the light emitting from blue to green under UV excitation can be realized by tailoring the Tb~(3+) doping level in KCPO:Ce~(3+). Besides, Ce~(3+) ions obviously intensify Tb~(3+) ion emission through an efficient energy transfer process, which was confirmed from decay curves. The energy transfer efficiency was determined to be 82.51%. A resonant type mechanism via the dipole–quadrupole interaction can be proposed for energy transfer. As a whole, the KCPO:Ce~(3+),Tb~(3+) phosphor exhibits excellent performance in the temperature range from 77 K to 673 K, indicating the phosphors are promising candidates for solid-state lighting.
引文
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