Na+, Li+, Bi3+掺杂CaWO4:Eu3+荧光粉的制备及发光特性

doi:10.7503/cjcu20170406

高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (1): 25.doi: 10.7503/cjcu20170406

• 研究论文: 无机化学 • 上一篇下一篇

Na⁺, Li⁺, Bi³⁺掺杂CaWO₄:Eu³⁺荧光粉的制备及发光特性

王林香^1,^2,³()

1. 新疆师范大学物理与电子工程学院, 乌鲁木齐 830054
2. 新疆矿物发光及其微结构重点实验室, 乌鲁木齐 830054
3. 新型光源与微纳光学重点实验室, 乌鲁木齐 830054

收稿日期:2017-06-25 出版日期:2018-01-10 发布日期:2017-12-19
作者简介:联系人简介: 王林香, 女, 博士, 副教授, 主要从事纳米发光材料的制备和性能研究. E-mail:wanglinxiang23@126.com
基金资助:
新疆维吾尔自治区自然科学基金(批准号: 2017D01A60)和新疆师范大学新型光源与微纳光学重点实验室项目(批准号: XJNUSYS092017B04)资助

Preparation and Luminescence Properties of Na⁺, Li⁺, Bi³⁺Doped CaWO₄:Eu³⁺ Phosphors^†

WANG Linxiang^1,^2,^3,^*()

1. College of Physics and Electronic Engineering, Urumqi 830054, China
2. Key Laboratory of Novel Luminescent Materials and Nanostructures of Xinjiang, Urumqi 830054, China
3. Key Laboratory of Novel Light Source and Micro/Nano-Optics, Xinjiang Normal University, Urumqi 830054, China

Received:2017-06-25 Online:2018-01-10 Published:2017-12-19
Contact: WANG Linxiang E-mail:wanglinxiang23@126.com
Supported by:
† Supported by the Natrural Science Foundation of Xinjiang Uygur Autonomous, China(No.2017D01A60) and the Foundation of Key Laboratory of Novel Light Source and Micro/Nano-Optics of Xinjiang Normal University, China(No.XJNUSYS092017B04)

摘要/Abstract

摘要：

采用微波辅助加热法合成了Na⁺, Li⁺, Bi³⁺掺杂的CaWO₄:Eu³⁺荧光粉. 利用X射线衍射仪和扫描电子显微镜对样品的微观结构进行了表征, 利用荧光分光光度仪对样品的激发光谱、发射光谱和能级寿命进行了测试和分析. 结果表明, 掺杂浓度(摩尔分数)均为3.75%的Eu³⁺, Na⁺, Li⁺, Bi³⁺掺杂的CaWO₄均保持了基质的四方晶相结构. Na⁺, Li⁺, Bi³⁺单掺杂或共掺杂后的样品比CaWO₄:Eu³⁺样品颗粒度分别有不同程度的增加. 在393 nm光激发下, 掺杂Eu³⁺, Na⁺及掺杂Eu³⁺, Li⁺样品的发光强度比CaWO₄:Eu³⁺的发光强度分别提高了1.8倍和1.2倍, 共掺杂Eu³⁺, Li⁺, Na⁺及Eu³⁺, Li⁺, Bi³⁺的样品发光均有所减弱. 在254和393 nm光激发下, 掺杂Li⁺的CaWO₄:Eu³⁺样品的荧光寿命最短. 同一样品在393 nm光激发下的荧光寿命短于254 nm光激发下的荧光寿命.

关键词: 微波辅助加热法, CaWO4:Eu3+, 发光特性, 能级寿命

Abstract:

Na⁺, Li⁺, Bi³⁺ doped CaWO₄:Eu³⁺ phosphors were synthesized by microwave-assisted heating solid state reaction method. The microstructures of the sampless were characterized by XRD and SEM. The excitation spectra, emission spectra and energy levels of the samples were detected and analyzed by fluorescence spectrophotometer. The results showed that the samples all kept the tetragonal matrix. Compared with the particle size of CaWO₄:Eu³⁺phosphor, the size of Na⁺, Li⁺, Bi³⁺ doped or codoped CaWO₄:Eu³⁺ phosphors all increased. Under 393 nm excitation, the luminescence intensities of samples doped with Na⁺ and Li⁺ are 1.8 and 1.2 times that of undoped these ions, and the luminescence intensities all decreased for the sample codoped with Li⁺, Na⁺ and the sample codoped with Li⁺, Bi³⁺. Under 254 and 393 nm excitation, the lifetime of the sample doped with Li⁺ was the shortest in all samples. For the same sample, the energy level lifetime under the 393 nm excitation was shorter than that under the 254 nm excitation.

Key words: Microwave-assisted heating method, CaWO4:Eu3+, Luminescence property, Energy level lifetime

TrendMD:

王林香. Na⁺, Li⁺, Bi³⁺掺杂CaWO₄:Eu³⁺荧光粉的制备及发光特性. 高等学校化学学报, 2018, 39(1): 25.

WANG Linxiang. Preparation and Luminescence Properties of Na⁺, Li⁺, Bi³⁺Doped CaWO₄:Eu³⁺ Phosphors^†. Chem. J. Chinese Universities, 2018, 39(1): 25.

图/表 7

Fig.1 XRD patterns of as-synthesized CaWO4:Eu3+(a), CaWO4:Eu3+, Na+(b), CaWO4:Eu3+, Li+ (c), CaWO4:Eu3+, Li+, Na+ (d) and CaWO4:Eu3+, Li+, Bi3+ (e)

Fig.2 SEM images of as-synthesized CaWO4:Eu3+ (A), CaWO4:Eu3+, Na+(B), CaWO4:Eu3+, Li+(C), CaWO4:Eu3+, Li+, Na+(D) and CaWO4:Eu3+, Li+, Bi3+(E)

Fig.3 Excitation(A) and emission(B) spectra of CaWO4:Eu3+ sample

Fig.4 Energy level transition of Eu3+ in CaWO4 matrix

Fig.5 Excitation(A) and emission(B) spectra of as-synthesized CaWO4:Eu3+ (a), CaWO4:Eu3+, Na+(b), CaWO4:Eu3+, Li+(c), CaWO4:Eu3+, Li+, Na+(d) and CaWO4:Eu3+, Li+, Bi3+ (e)

Fig.6 Fluorescence decay curves of 5D0→7F2 level of Eu3+ of as-synthesized CaWO4:Eu3+ (A),CaWO4:Eu3+, Na+(B), CaWO4:Eu3+, Li+ (C), CaWO4:Eu3+, Li+, Na+(D) and CaWO4:Eu3+, Li+, Bi3+(E)(λex=254, 393 nm)

Table 1 5D0 energy level lifetime of samples

λ_ex /nm	Lifetime/μs
λ_ex /nm	Sample 1	Sample 2	Sample 3	Sample 4	Sample 5
254	584	583	458	595	598
393	448	465	292	323	322

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Na⁺, Li⁺, Bi³⁺掺杂CaWO₄:Eu³⁺荧光粉的制备及发光特性

Preparation and Luminescence Properties of Na⁺, Li⁺, Bi³⁺Doped CaWO₄:Eu³⁺ Phosphors^†

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