Tb3+/Eu3+共掺YF3纳米玻璃陶瓷：结构、变色发光与温度传感特性

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Tb3+/Eu3+共掺杂的YF3纳米嵌入式玻璃陶瓷是一种新颖的复合材料，其制备过程采用了熔融淬火和后续加热工艺。这种透明大块玻璃陶瓷的核心是含有正交晶相的β-YF3纳米晶粒，这些纳米晶粒作为稀土离子（Tb3+和Eu3+）的有效载体。Tb3+和Eu3+的选择性共掺杂使得这种材料具有独特的光致发光性能。元素映射技术在扫描透射电子显微镜（STEM）中发挥了关键作用，通过分析元素分布，科学家们确认了活性中心（稀土离子）在YF3晶体结构中的均匀分布。这表明了玻璃陶瓷内部良好的能量传递效率，特别是在Tb3+到Eu3+的能量转移过程中。与传统的玻璃基质相比，这种共掺杂体系显示出显著增强的能量传递效果，这对于实现颜色可调发光具有重要意义。研究人员通过调整Eu3+的掺杂浓度，实现了线性温度依赖性的荧光特性。Tb3+：5 D4→7 F5跃迁与Eu3+：5 D0→7 F4跃迁之间的强度比随着温度的变化而变化，从而赋予了玻璃陶瓷随温度变化的色彩调控能力，这对于潜在的应用在固态照明领域具有吸引力，如LED或显示器件。此外，由于Tb3+/Eu3+共掺杂玻璃陶瓷的光学性质，它还被看作是一个有前景的光学温度传感器。其对温度敏感的荧光响应使其能够实时监测环境或设备的温度变化，这对于工业过程控制、环境监测和热成像等领域具有实际价值。 Tb3+/Eu3+：YF3纳米嵌入式玻璃陶瓷的制备和表征结果不仅揭示了新型光致发光材料的可能性，也展示了其在温度传感方面的潜在应用，有望推动固态照明和温度测量技术的发展。

3þ

/Eu

3þ

:YF

nanophase embedded glass ceramics: Structural

characterization, tunable luminescence and temperature sensing

behavior

Daqin Chen

, Zhongyi Wang

, Yang Zhou

, Ping Huang

, Zhenguo Ji

College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, PR China

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on The Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002,

PR China

article info

Article history:

Received 10 May 2015

Received in revised form

1 June 2015

Accepted 2 June 2015

Available online 10 June 2015

Keywords:

Glass ceramics

Nanocrystals

Luminescence

Rare earth ions

Optical temperature sensor

abstract

3þ

/Eu

3þ

co-doped transparent bulk glass ceramics containing orthorhombic

-YF

nanocrystals were

successfully synthesized by melt-quenching and subsequent heating. The partition of the active centers

into the YF

crystalline lattice was conﬁrmed by elemental mapping in the scanning transmission

electron microscope, emission spectra and decay curves. As a consequence, Tb

3þ

/ Eu

3þ

energy transfer

was demonstrated to be more efﬁcient in the glass ceramic than in the precursor glass, which resulted in

color tunable luminescence by simply modifying Eu

3þ

content and induced the linearly temperature-

dependent ﬂuorescence intensity ratio between the Tb

3þ

transition and the Eu

3þ

one in the Tb

3þ

/Eu

3þ

co-doped glass ceramic. It is expected that the investigated glass ceramic

might be a promising candidate for solid-state lighting as well as optical temperature sensor.

1. Introduction

Rare earth (RE

3þ

) ions doped optical materials have attracted

great attentions for their promising applications in laser, solid-state

lighting, optical telecommunication, sensor, biolabel and solar cells

etc [1e8]. In order to achieve desirable optical performance, the

host materials, where RE

3þ

ions reside, should be appropriately

selected because the radiative/nonradiative transitions as well as

energy transfer of RE

3þ

ions are highly dependent on the envi-

ronment surrounding them [9e12]. So far, transparent inorganic

materials, such as single crystal and transparent ceramics, have

been widely used as the host for RE

3þ

ions owing to their suitable

crystalline environment and high ability to transmit light [13,14].

Unfortunately, technical challenges, including complicated and

time-consuming procedures to avoid porosity, limited composi-

tions, segregation of doping agents, etc, remain to produce these

transparent materials [15].

In fact, glass-ceramic (GC) technology can be used to avoid these

obstacles of both single crystals and transparent ceramics. GCs are a

kind of composite materials consisting of both crystalline and

glassy phases, which are fabricated by a routine melt-quenching

way followed by subsequent glass crystallization treatment

[16e24]. High transparency can be realized by controlling the size

of the precipitated nanocrystals (NCs) smaller than the visible light

wavelength or matching the refractive indexes between NCs and

glassy hosts [25]. One of key factors for the efﬁcient luminescence

of GC is the preferential partition of the optically active centers into

the precipitated crystalline phase. In this case, this kind of com-

posites may combine the favorable properties from both crystals

and glasses, i.e., special crystal ﬁeld environments for optically

active dopants and high mechanical, chemical stabilities as well as

easy-fabrication.

In the present work, we report the structural characterization,

energy transfer (ET), tunable luminescence and temperature

sensing behavior of Tb

3þ

/Eu

3þ

co-doped GCs containing ortho-

rhombic YF

NCs. The selection of Tb

3þ

and Eu

3þ

as activators has

recently received considerable interests for possible applications in

white light emitting diodes (WLEDs) and temperature sensors,

owing to their tunable luminescence with the help of energy

transfer from Tb

3þ

to Eu

3þ

[26e30]. As for as we known, it is the

* Corresponding authors.

E-mail addresses: dqchen@hdu.edu.cn (D. Chen), phuang@fjirsm.ac.cn

(P. Huang), jizg@hdu.edu.cn (Z. Ji).

Contents lists available at ScienceDirect

Journal of Alloys and Compounds

journal homepage: http://www.elsevier.com/locate/jalcom

http://dx.doi.org/10.1016/j.jallcom.2015.06.030

Journal of Alloys and Compounds 646 (2015) 339e344

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