真空紫外激发下Dy3+掺杂SrB4O7的发光特性研究
20 浏览量
更新于2024-09-06
收藏 404KB PDF 举报
"The luminescence properties of Dy3+ activated SrB4O7 under VUV excitation"
这篇论文探讨了在真空紫外（VUV）激发下掺杂镝离子（Dy3+）的SrB4O7荧光粉的发光特性。苟婧、王育华和李峰等人通过固相反应法成功合成了Dy3+掺杂的SrB4O7，并对其首次进行了详细的研究。他们发现，这种材料在147纳米处的激发光谱中有强烈的吸收，这表明能量可以有效地从基质吸收转移到Dy3+离子的能级，从而使得在VUV激发下，SrB4O7:Dy3+的发光非常有效。
SrB4O7:Dy3+的发光性质在白光领域具有潜在的应用价值，特别是作为无汞灯泡的候选材料。当前，稀土离子激活的荧光粉被广泛应用于各种领域，如荧光灯、显示设备、检测系统、免疫分析和磷光标记的闪烁体等。这些设备中的荧光材料主要通过吸收能量并将其转化为可见光来工作。
在灯具应用中，尤其是在无汞灯的设计中，寻找替代传统水银蒸气的发光材料是至关重要的。Dy3+掺杂的SrB4O7因其在VUV下的高效发光，可能成为一种理想的无汞灯用荧光粉。其在147纳米的强烈吸收表明，它能有效地响应VUV光源，这为设计高效率、环保的照明设备提供了新的可能性。
实验结果显示，Dy3+在SrB4O7基质中的掺杂增强了材料的发光性能。通常，稀土离子如Dy3+具有多个能级，它们可以作为能量传递和转换的中心，通过不同的能级跃迁产生多种颜色的光。在 SrB4O7:Dy3+体系中，Dy3+离子的特定能级跃迁可能导致白光发射，这是由于Dy3+离子在不同激发态之间的多重跃迁，可以覆盖可见光谱的宽范围，从而实现白光发射。
此外，SrB4O7作为基质材料，其化学稳定性好，热导率高，这些特性对于灯具的长期稳定运行至关重要。通过精细调控Dy3+的掺杂浓度和其他辅助激活剂的添加，可以进一步优化其发光性能，以适应不同的应用需求。
这项研究揭示了Dy3+掺杂的SrB4O7在VUV激发下的优异发光特性，对于发展新型无汞照明技术具有重要意义。研究人员还可能通过改变合成条件、调整掺杂比例等方式，进一步提升SrB4O7:Dy3+的发光效率和颜色品质，以满足更加严格的照明标准和市场要求。
http://www.paper.edu.cn
- 1 -
The luminescence properties of Dy
3+
activated
SrB
4
O
7
under VUV excitation
Jing Gou，Yuhua Wang
*
，Feng Li
Department of Material Science，Lanzhou University，Lanzhou （730000）
E-mail：gouj05@lzu.cn，wyh@lzu.edu.cn，fli02@st.lzu.edu.cn
Abstract
Dy
3+
doped SrB
4
O
7
phosphors were synthesized by solid state reaction. The luminescence properties of
white-light SrB
4
O
7
:Dy
3+
under VUV excitation were firstly investigated. According to strong
absorption around 147 nm in excitation spectra, energy can easily be transferred to the energy levels of
Dy
3+
from host absorption, so that the luminescence of SrB
4
O
7
:Dy
3+
under VUV excitation was
effective, and it was potential to be applied to a white lamp-house for mercury-free lamp.
Keywords：VUV，phosphor，luminescence，mercury-free lamp
1. Introduction
Nowadays, rare-earth-ion-activated phosphors are applied to various fields, e.g., fluorescent lamps,
display devices, detector systems, immunoassays and scintillates of phosphor marking, etc [1-4]. In
these devices, luminescent materials absorb the energy and then convert it to visible light. However,
there is a challenge in the field of luminescent materials of rare-earths in the vacuum ultraviolet (VUV)
region (λ﹤200 nm, energy ﹥50000 cm
-1
). Rare-earth (RE) ions doped borate-based phosphors has
been applied for various fields, such as plasma display panels (PDP) and visible lasers, because of its
many advantages such as high non-linear optical coefficient and strong absorption in VUV/UV region,
well environment durability, chemical stability and optical properties [4,5]. Besides above excellence
of borate-based phosphors, strontium tetraborate SrB
4
O
7
has more wonderfully value, such as
thermoluminescent dosimetric characteristics, relative lower cost, lower synthesis temperature, relative
easier preparation and nonhygroscopicity, so that it has been investigated applied to ultrafast diagnostic
and pressure optical sensor [6,7] and SrB
4
O
7
:Dy
3+
has been studied using the thermoluminescent
technique to investigate their potential applications for high-dose β-ray dosimetry [8]. Dy
3+
has two
dominant bands in the emission spectrum in many host matrixes such as Ba
3
Gd(PO
4
)
3
,
Mg
2
Gd
8
(SiO
4
)
6
O
2
[9, 11]. The band located at 574 nm (yellow) attributes to the hypersensitive
transition
4
F
9/2
-
6
H
13/2
(△L=2, △J=2), and another band located at 487 nm (blue) corresponds to the
transition
4
F
9/2
-
6
H
15/2
. The intensity of the former varies with the environment more obviously than the
latter’s. In the CIE 1931 chromaticity diagram, the line linking the yellow and blue wavelength cross
the white light region, therefore adjust a suitable yellow-to-blue intensity ratio (Y/B), the chromaticity
coordinates of the phosphor doped with Dy
3+
could be controlled in the white region. There are several
reports about the phosphors with Dy
3+
, which were studied for directly white light produced [9-11]. In
this work, the photoluminescence of SrB
4
O
7
: Dy
3+
is evaluated under the excitation of VUV was firstly
investigated.
2. Experimental
Powder samples Sr
1-x
B
4
O
7
:xDy
3+
, were prepared by solid state reactions. The purities of SrCO
3
,
H
3
BO
3
are A.R., and that of Dy
2
O
3
is better than 99.99%. The doping amount x of Dy
2
O
3
is from 0 to
10%. Stoichiometric amounts of the starting reagents SrCO
3
, H
3
BO
3
and Dy
2
O
3
were thoroughly mixed
and ground together; a 10% excess of the boric acid was used to compensate for the evaporation of the
boric acid at high temperature in solid state reactions. The mixture was heated at 500°C for 2h,
reground and reheated at the temperature of 900°C for 1.5h.
The X-ray powder diffraction (XRD) patterns of all samples were carefully collected in the 2θ range
下载后可阅读完整内容，剩余4页未读，立即下载
2021-02-21 上传
2021-02-09 上传
2020-02-10 上传
2020-03-12 上传
2021-02-09 上传
2021-02-12 上传
2021-02-09 上传
2021-02-10 上传
2021-02-07 上传
2021-02-08 上传
weixin_38690095
- 粉丝: 4
- 资源: 914
我的内容管理
展开
最新资源
- Android圆角进度条控件的设计与应用
- mui框架实现带侧边栏的响应式布局
- Android仿知乎横线直线进度条实现教程
- SSM选课系统实现：Spring+SpringMVC+MyBatis源码剖析
- 使用JavaScript开发的流星待办事项应用
- Google Code Jam 2015竞赛回顾与Java编程实践
- Angular 2与NW.js集成：通过Webpack和Gulp构建环境详解
- OneDayTripPlanner：数字化城市旅游活动规划助手
- TinySTM 轻量级原子操作库的详细介绍与安装指南
- 模拟PHP序列化:JavaScript实现序列化与反序列化技术
- ***进销存系统全面功能介绍与开发指南
- 掌握Clojure命名空间的正确重新加载技巧
- 免费获取VMD模态分解Matlab源代码与案例数据
- BuglyEasyToUnity最新更新优化：简化Unity开发者接入流程
- Android学生俱乐部项目任务2解析与实践
- 掌握Elixir语言构建高效分布式网络爬虫
