Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 44
·16670-16678
·
IF 8.067
Peishan Shao,Puxian Xiong,Yao Xiao,Qianyi Chen,Yongsheng Sun,Na Yan,Dongdan Chen,Zhongmin Yang
Mechanoluminescent (ML) materials, which can emit light under external mechanical stimuli, have attracted much interest in diverse applications such as stress sensing, anti-counterfeiting and 3D signatures. However, ML materials located within the ultraviolet (UV) spectral range are still limited. In this study, a series of LixY0.995GeO4:0.005Bi3+ (0.898 ≤ x ≤ 1.003) samples are synthesized by a high temperature solid-state reaction method. The crystal structure, ML, persistent luminescence (PersL) and photoluminescence (PL) are systematically studied. The excellent UVA PersL of LiYGeO4:Bi3+ can be ascribed to the existence of abundant trap sites created by the intentional loss of Li+ ions, which can improve the ML properties of the phosphors. This excellent material can make up for the deficiency of PersL materials in the UVA region (315–450 nm), and it may greatly expand the application of ML materials in the biomedical, energy and catalysis fields.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
DOI
高影响因子
LUMINESCENCE
·
2022
·Vol. 37
·期 12
·2018-2027
·
IF 2.613
Guangjin Ou,Hongqing Song,Xinyong Gong,Ruirui Cui,Chaoyong Deng
A new green luminescent phosphor, Li(Y 1- x Tb x )GeO 4 , was prepared using a high-temperature solid-phase method. The X-ray diffraction (XRD) measured spectrum agreed well with the standard card JCPDS No. 02-3479, indicating that it is a quaternary compound belonging to the space group of Pnma(62) with an orthogonal crystalline phase; the excitation and emission spectra measured using the phosphor spectrometer showed that it can be effectively excited by near-ultraviolet light at 378 nm and blue light at 482 nm, and produced excellent strong emission of green light at 550 nm. The afterglow test results show that the sample had a good long afterglow effect at lower doping concentrations; the thermal stability test results showed that its thermal burst activation energy ΔE ≈ 0.37 eV had its excellent thermal stability. The rare earth Tb 3+ -doped green phosphor, LiYGeO 4 :Tb 3+ , has potential applications in household lighting, medical therapy, and optical storage.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Tiansong Dai,Guifang Ju,Yang Lv,Yahong Jin,Haoyi Wu,Yihua Hu
Here, a new LiYGeO 4 : Eu 3+ phosphor exhibiting long red persistent luminescence (PerL) is developed herein. Experimental results show that LiYGeO 4 : Eu 3+ with a low doping concentration of Eu 3+ emits high-intensity red PerL, which lasts for more than 21 h. The red PerL of the preirradiated LiYGeO 4 : Eu 3+ phosphor can be repeatedly excited to increase its intensity via short-term stimulation using low-energy near-infrared (NIR) light. Furthermore, LiYGeO 4 : Eu 3+ exhibits strong intrinsic emission, enhancing the f-f emission of Eu 3+ . The PerL emission, photoluminescence (PL) emission, and thermoluminescence (TL) spectra are identical, suggesting the emission originating from the host and Eu 3+ center. TL measurements were conducted to intensively study the trap characteristics of LiYGeO 4 : Eu 3+ using the Booth-Bohun and T m -T stop methods. Results reveal the underlying mechanism of the PerL and the importance of Eu 3+ as the introduced traps in LiYGeO 4 : Eu 3+ . LiYGeO 4 : Eu 3+ with a high doping concentration of Eu 3+ exhibits excellent PL properties and thermal stability, with its quantum efficiency surpassing those of commercial phosphors such as Y 2 O 3 : Eu 3+ , suggesting its potential application in solid-state lighting. Thus, the doping of LiYGeO 4 : Eu 3+ with low and high concentrations of Eu 3+ can be helpful in fabricating materials exhibiting different luminescence properties.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 11
·期 6
·2120-2128
·
IF 8.067
Peishan Shao,Puxian Xiong,Dongliang Jiang,Zhicong Chen,Yao Xiao,Yongsheng Sun,Dongdan Chen,Zhongmin Yang
Mechanoluminescence (ML) materials, which can emit light under external mechanical stimuli, have attracted wide attention in diverse applications such as displays, anti-counterfeiting and 3D signatures. However, weak ML intensity and limited ML regulation methods are still limiting the development of ML materials. In this study, a series of Li0.997YGeO4:0.5% Bi3+,xTb3+ samples are synthesized by a high temperature solid-state reaction method. Based on photoluminescence (PL), crystal structures, ML, persistent luminescence (PersL), diffuse reflectance (DR) spectra and thermoluminescence (TL) analysis, the inherent relationship between PL, PersL and ML is further clarified in detail. The existence of abundant trap sites created by the vacancy of Li+ ions and the Bi3+ → Tb3+ energy transfer can improve the ML properties of phosphors. These excellent materials can open up a new approach for enhancing the ML intensity and expand the application of ML materials in the anti-counterfeiting fields.
研究领域:
材料科学
·
发光材料
·
光学性能
·
防伪技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ying Lv,Ning Zhao,Chaofeng Li,Cunjian Lin,Shihai You
Efficient and stable persistent phosphors play a crucial role in the fields of energy storage, anti-counterfeiting, and biomedical fields. Here, we present an improved synthetic method for preparing a series of color-tunable LiYGeO 4 :Tb 3+ persistent phosphor. The increased Tb 3+ concentration in the improved method enhances the persistent luminescent intensity at 20 s by ∼2.96 times. This enhancement is due to the dual roles of Tb 3+ as both emitters and trap centers within LiYGeO 4 . By simply increasing the doping concentrations, the persistent color can be adjusted from blue to green. LiYGeO 4 :Tb 3+ exhibits no loss of persistent luminescent intensity even after exposure to water at 80 °C for 72 h, surpassing the commercial green persistent phosphor. Furthermore, information storage was successful demonstrated by using LiYGeO 4 :Tb 3+ with various doping concentrations. This study represents a significant advancement in optimizing the properties of persistent luminescent materials, where dopants simultaneously serve as emitters and trap centers.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2019
·Vol. 7
·期 19
·1900526
·
IF 7.125
Junpeng Shi,Xia Sun,Shenghui Zheng,Xiaoyan Fu,Yi Yang,Jiani Wang,Hongwu Zhang
Here, a novel super-long, ultraviolet A region (UVA), persistent luminescent (PerL) material, LiYGeO 4 :Bi 3+ , is developed. After irradiation at 254 nm for 10 min, the UVA PerL of LiYGeO 4 :Bi 3+ can persist for more than 300 h. In addition, the LiYGeO 4 :Bi 3+ also possesses a strong UVA emission with a power density of 11.83 mW m −2 at 10 s after the removal of the excitation source. Even after 72 h, the UVA PerL emission spectrum can still be clearly detected, which is the same as the photoluminescence emission spectrum and originated from the Bi 3+ emitting centers. Furthermore, LiYGeO 4 :Bi 3+ also exhibits a photostimulated PerL property, which can be easily activated with a red light emitting diode (LED) or NIR laser irradiation after the long-term decay. Combining the results of the PerL excitation, absorption, and thermoluminescence spectra, the excellent UVA PerL of LiYGeO 4 :Bi 3+ can be ascribed to the existence of abundant trap sites created by the loss of Li + . This excellent PerL material can make up for deficiency of PerL materials in the UVA region and greatly expand the application of PerL materials in the biomedical, energy, environmental, and catalysis fields.
研究领域:
材料科学
·
发光材料
·
光学性质
·
固态化学
·
光子学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 36
·期 8
·e11845
·
IF 19
Ying Lv,Chaofeng Li,Ning Zhao,Rujun Yang,Jiang Zhu,Yu Liu,Chunlai Huang,Shihai You,Jumpei Ueda
Exploring efficient strategies to enhance persistent luminescence (PersL) is highly demanded to facilitate advanced applications of inorganic PersL phosphors. In this work, a remarkable enhancement of Mn 2+ PersL in LiYGeO 4 (LYGO) with tunable wavelengths is achieved through Bi 3+ codoping. The Mn 2+ emission can be tuned from 600 to 664 nm by increasing the doping concentration, attributed to site-selective occupation of different crystallographic sites. The pronounced enhancement in the PersL of Mn 2+ is achieved through the synergistic interplay of energy transfer from Bi 3+ to Mn 2+ and electron-capture competition between the two hole-trapped ions. Specifically, the PersL intensity of LYGO:0.5%Mn 2+ ,0.125%Bi 3+ at 30 s increased by 444 times compared to that of LYGO:0.5%Mn 2+ after 254 nm excitation. Thermoluminescence measurement reveals that introduction of Bi 3+ creates an additional trap center with depth of 0.60 eV. Moreover, LYGO:Mn 2+ ,Bi 3+ exhibits excellent water resistance and shows great potential for applications in information storage and X-ray detection. This work not only demonstrates an intense red PersL phosphor, but also provides an efficient strategy to enhance PersL in inorganic materials via energy transfer and electron-capture competition.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）