Advanced Optical Materials
·
2023
·Vol. 11
·期 20
·2300623
·
IF 9
Zhihao Wang,Bohan Wang,Xiping Zeng,Dengfeng Peng,Yu Wang
Current luminescence materials are abundantly available for visualization fields on a theoretical level, while the lack of luminescent intensity has largely hindered their practical application. Here, the substantial enhancement of the multimode luminescence is demonstrated including mechanoluminescence (ML), photoluminescence (PL), and X-ray excited optical luminescence (XEOL) for Mn 2+ and Tb 3+ in zinc calcium oxysulfide (CaZnOS) by increasing the concentration of oxygen vacancies (OVs). Through a comprehensive structure analysis, it is found that the CaZnOS lattice has a tolerance of 60% of Sr 2+ with respect to Ca 2+ in the methodology. The experimental characterizations verified that the lattice distortion of CaZnOS originating from Sr 2+ incorporation can efficiently promote the elimination of oxygen elements and simultaneously produce more OVs in the matrix, which can effectively fortify the trapped electrons and ultimately promote stronger luminescence. The ML, PL, and XEOL achieve around two to six times’ enhancement after Sr 2+ incorporation. The findings provide insight into mechanisms underlying the luminescence behavior change of phosphors after cation substitution and may have wide implications for the practical application of intrinsically defective phosphors.
研究领域:
材料科学
·
发光材料
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Ma Ronghua,Wang Chunfeng,Mao Shaohui,Shao Yonghong,Wang Zhihao,Wang Yu,Peng Dengfeng
Under the excitation of ultraviolet, X-ray, and mechanical stress, intense orange luminescence (Mn2+, 4T1 → 6A1) can be generated in Mn2+-doped SrZn2S2O crystal in orthorhombic space group of Pmn21. Herein, the multiple energy conversion in SrZn2S2O:Mn2+, that is, photoluminescence (PL), X-ray-induced luminescence, and mechanoluminescence, is investigated. Insight in luminescence mechanisms is gained by evaluating the Mn2+ concentration effects. Under the excitation of metal-to-ligand charge-transfer transition, the most intense PL is obtained. X-ray-induced luminescence shows similar features with PL excited by band edge UV absorption due to the same valence band to conduction band transition nature. Benefiting much from trap levels introduced by Mn2+ impurities, the quenching behavior mechanoluminescence is more like the directly excited PL from Mn2+ d-d transitions. Interestingly, this concentration preference leads to varying degrees of spectral redshift in each mode luminescence. Further, SrZn2S2O:Mn2+ exhibits a good linear response to the excitation power, which makes it potential candidates for applications in X-ray radiation detection and mechanical stress sensing.
研究领域:
材料科学
·
光学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Zhihao Wang,Mengxiao Zhang,Jiao He,Yongan Tang,Tingchao He,Qiang Sun,Dianyuan Fan,Yu Wang
The development of emitting materials that present both photoluminescence (PL) and X-ray excited optical luminescence has recently been attracting rising research interest for visualization applications. We introduced in this study the hydrothermally crystallized (Sr 1- x Mn x ) 5 (PO 4 ) 3 F 1- y Cl y ( x = 0–0.05, y = 0–0.40) nanorods with favorable PL and X-ray excited optical luminescence properties after composition modulating. The effects of solution pH and Cl − incorporation on structure and morphology of the products were firstly unveiled. (Sr 1- x Mn x ) 5 (PO 4 ) 3 F gives green emission at ∼548 nm ( 4 T 1 ( 4 G) → 6 A 1 ( 6 S)) under either 402 nm excitation or X-ray irradiation, and the optimal PL and X-ray excited optical luminescence were observed at x = 0.03. The replacement of F − by larger Cl − led to the generation of an amount of Frenkel defects (the dislocated F − and anion vacancies V F . ) along the c -axis, benefit from which the (Sr 0.97 Mn 0.03 ) 5 (PO 4 ) 3 F 1- y Cl y samples present enhanced PL and X-ray excited optical luminescence intensities by factors of 1.6 and 7.4, respectively, and the corresponding optimal y values are determined to be 0.20 and 0.30. Fluorescence decay analysis found steadily shortened fluorescent lifetime for Mn 2+ at higher Mn 2+ and Cl − concentrations, and the underlying mechanism was discussed. The (Sr,Mn) 5 (PO 4 ) 3 (F,Cl) apatite material, with enhanced PL and X-ray excited optical luminescence, may find novel applications for both lighting and scintillating.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Sarfraz Ahmad,Shulong Chang,Danni Peng,Wenjin Liu,Kaiying Zhang,Yuan Deng,Lin Dong
Multimode luminescent materials possess diverse optical characteristics and play crucial roles in photocommunication and information security. Force-induced mechanoluminescence, as a distinctive excitation mode, exhibits impressive capabilities in the field of anticounterfeiting and information storage. Here, we integrate mechanoluminescence with the conventional luminescence modes (including up-conversion luminescence, down-conversion luminescence, and thermoluminescence (TL)) within LiNbO3 via well-tuned codoping of Er3+ and Pr3+. LiNbO3:Pr3+/Er3+ exhibits excitation-dependent photoluminescence (PL), enabling tunable emission colors ranging from green to red, while it shows green up-converted PL emissions owing to the electronic transitions of Er3+ ions. Both TL and mechanoluminescence emissions are achieved by employing intertrap levels, where mechanical or thermal stimulation releases carriers that transfer energy to Pr3+ ions, resulting in red emissions. Moreover, an underlying competitive interaction between TL and mechanoluminescence is revealed, which can be leveraged for force/thermo-encored information storage. This unique feature positions LiNbO3:Pr3+/Er3+ as novel recordable information storage labels to monitor the freshness of perishable goods such as food and medicine. In addition, quadra-mode luminescence material LiNbO3:Pr3+/Er3+ provides multidimensional codes via emission color and distribution, indicating its significant potential in advanced anticounterfeiting technology.
研究领域:
材料科学
·
光学
·
信息科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Advances
·
2023
·Vol. 4
·期 16
·3645-3653
·
IF 5
Nengni Xu,Wenhua Xu,Meng Sun,Yi Yuan,Xinjun Luan,Ying Wang,Hui Wang
Strategic structure designs to develop organic multi-stimuli-responsive fluorescent materials are highly desired, but hard to achieve. We report here a novel multi-stimuli responsive luminescent material TXENE (1,2-di(9H-thioxanthen-9-ylidene)ethane) composed of double thioxanthene chromophores and a diene liker that integrate polymorphism, aggregation-induced emission (AIE), mechanoluminescence (MCL), thermoresponsive luminescence (TCL), and triboluminescent (TL) properties into one single molecule. Three crystalline polymorphs including TXENE-G and TXENE-Y with a terminal up–down conformer and TXENE-R with an up–up form are obtained. The X-ray structure analysis revealed that not only the intermolecular interactions but also the terminal chromophore-thioxanthene conformation (up–down vs. up–up) dominate polymorphism, thus leading to distinct luminescent properties. It is shown that MCL, TCL and TL properties can be systematically tuned via its aggregation state regulation; typically, the metastable TXENE-G and TXENE-R are MCL and TCL active, while TXENE-Y is TL active. Lastly, we illustrate the possible application of color-changeable indicators for information anti-counterfeiting and thermal sensing by using TXENE. This study demonstrates that multiple unique functions can be integrated into one single compound by fine controlling its aggregation states, which render a new strategy for the investigation of multifunctional organic materials.
研究领域:
材料科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2013
·Vol. 42
·期 34
·12101-12108
·
IF 3.806
Zhuo Wang,Jing Feng,Min Pang,Shunhao Pan,Hongjie Zhang
In this paper, uniform rice-shaped lanthanide doped BiPO4 upconversion submicron particles have been successfully synthesized via a facile room-temperature co-precipitation reaction and subsequent calcination route. The morphology, phase transformation and upconversion luminescent properties of synthesized submicron particles (SMPs) were characterized by using different analytical techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetry-differential scanning calorimetry (TG-DSC) and upconversion luminescence (UCL) spectra. The transformation from hexagonal phase to monoclinic phase is crucial for upconversion luminescent properties due to the loss of water molecules in the lattice of hexagonal phase. With different variety and concentration of the dopant Ln3+ (Ln = Yb, Er, Tm and Ho) ions, the obtained samples present bright green, blue, and red upconversion emissions under a 980 nm continual wave laser diode excitation. Multicolor and bright white upconversion emissions have also been obtained by precisely adjusting the dopants concentration in the host lattice.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 22
·10260-10270
·
IF 4.682
Zhang Fa,Lin Zhengguo,Xie Lingling,Li Xitao,Lu Bingheng,Zhao Ziheng,Jiang Ting,Wang Min,Wu Yafeng,Zhou Quan,Xiao Jiawen,Chen Bingkun,Wang Yongtian
Abstract Copper-based lead-free perovskite derivatives have recently drawn great attention for their excellent optoelectronic properties and potential applications in light-emitting diodes (LEDs) and photodetectors. Herein, facile synthesis methods of cooling crystallization and wet ball milling (WBM) are adopted to synthesize K 2 CuCl 3 , resulting in single crystals (SCs) and powder samples, respectively. The as-fabricated K 2 CuCl 3 samples exhibit blue–violet emission, with the highest photoluminescence quantum yield (PL QY) of 70% (under 280 nm excitation), and the photoluminescence (PL) is attributed to the self-trap excitons (STEs) emission. We also test the scintillation properties of K 2 CuCl 3 for X-ray detection and imaging applications. A down-conversion LED is finally made by using K 2 CuCl 3 as phosphor. Graphical abstract
As-synthesized K2CuCl3 can be used for either photoluminescence under UV
light or X-ray imaging under X-ray radiation. -- Present in ms
研究领域:
材料科学
·
光学
·
放射学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Zhichao Liu,Xiuxia Yang,Xue Yu,Jianqiang Xiao,Peng Zhang,Daiyuan Liu,Jian Zhang,Xuhui Xu,Jianbei Qiu
The differences in the luminescent performance of phosphors determine their application in diverse occasions. However, the development of Eu 2+ ion doped phosphors materials with high optical properties is not satisfactory due to the harsh synthesis conditions. Herein, a series of Sr 4 Al 14 O 25 : Eu 2+ , Nd 3+ , Tm 3+ are constructed by high temperature solid reaction without applying reducing gas and protective gas. The charge mismatch caused by the unequal substitution promotes the spontaneous reduction of Eu 3+ ions to Eu 2+ . Nd 3+ and Tm 3+ are co-doped into Sr 4 Al 14 O 25 : Eu 2+ to regulate the trap structure, and photoluminescence , long persistent luminescence, photo-stimulated luminescence and mechanoluminescence of Eu 2+ ions are simultaneously achieved in Sr 4 Al 14 O 25 : Eu 2+ , Nd 3+ , Tm 3+ . The relationship between trap and optical performance is explored in detail, and the temperature effect during mechanoluminescence is demonstrated for the first time. This research provides a new idea for the rapid synthesis of highly optical performance Eu 2+ -doped phosphors in air.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 6
·1410
·
IF 3.057
Yi-Fei Zhu,Tong Jiang,Lei Li,Long-Xiang Cheng,Jun-Cheng Zhang
Trap-controlled mechanoluminescent (ML) materials characterized by reproducible mechanoluminescence (ML) after irradiation recharging have shown attractive prospects in applications including stress distribution visualization, stress-driven light sources, and anti-counterfeiting. However, these materials generally suffer from the difficulty of achieving non-decaying ML when subjected to continuous mechanical stimulation. Herein, we develop a trap-controlled reproducible ML material, Li2MgGeO4:Mn2+, and report its short-term non-decaying ML behavior. Investigation of trap properties suggests that the unique non-decaying ML behavior should arise from the deep traps existing in Li2MgGeO4:Mn2+, which provide electron replenishment for shallow traps that release small numbers of electrons during short-term cyclic friction. Our results are expected to provide a reference for the ultimate achievement of long-term non-decaying ML in such materials.Keywords:mechanoluminescence;traps;phosphors
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 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
OPTICAL MATERIALS
·
2024
·
IF 3.8
Jian He,Bowen Wang,Changshuai Gong,Xuejiao Wang,Qiushi Wang,Ji-Guang Li
Gd 3+ co-doping is effective to enhance the photoluminescence of rare earth activators in various host due to energy transfer, however, it is rarely reported via such strategy to regulate persistent luminescence properties. In this work, Gd 3+ was co-doped into the SrLaAlO 4 : Tb persistent luminescence phosphors, and it is found that the photoluminescence and persistent luminescence of the products can be simultaneously improved. The results indicate that as the doping concentration of Gd 3+ increases, the particle diameters increase which contributes the increased luminescence. Additionally, an energy transfer process from Gd 3+ to Tb 3+ ions was observed, which enhances the emission of Tb 3+ ions. Furthermore, the persistent luminescence properties of the synthesized phosphors were improved. When the UV light source is turned off, the persistent luminescence of SrLaAlO 4 : 0.03Tb 3+ , x Gd 3+ ( x = 0.00–0.97) can last for more than 2 h, which is 100 % enhanced compared to SrLaAlO 4 : 0.03Tb 3+ . The trap distribution of SrLaAlO 4 : 0.03Tb 3+ , x Gd 3+ ( x = 0.00–0.97) phosphors was analyzed by thermoluminescence. It is found that after the substitution of La 3+ with Gd 3+ , the trap position shifted towards higher temperatures and the trap concentration increased. The initial intensity of the persistent luminescence was also enhanced after Gd 3+ co-doping. Based on the experimental findings, the luminescence and persistent luminescence mechanism of SrLaAlO 4 : 0.03Tb 3+ , x Gd 3+ ( x = 0.00–0.97) phosphors were described and discussed.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Small Structures
·
2024
·Vol. 5
·期 7
·2400096
·
IF 13.9
Tianxin Bai,Qiujie Wang,Yunfei Bai,Qichao Meng,Hongyuan Zhao,Ziying Wen,Haibo Sun,Li Huang,Junke Jiang,Dan Huang,Feng Liu,William W. Yu
The rich and unique energy level structure arising from 4f n inner shell configuration of trivalent lanthanide ions (Ln 3+ ) renders them highly attractive for light-emitting applications. Currently, research primarily focuses on Ln 3+ doping in either traditional garnets or the recently developed perovskite phosphors. However, there have been few reports on stable phosphors crystallized with pure lanthanide elements. Herein, a universal solution-based route to eight Ln 3+ -based metal halides from the organic-inorganic A 4 LnX 7 family is described, where A + = 4,4-difluoropiperidinium (DFPD + ), Ln 3+ = Nd 3+ , Eu 3+ , Ho 3+ , Sm 3+ , Tm 3+ , Tb 3+ , Yb 3+ , Er 3+ , and X − = Cl − , Br − . Visible photoluminescence (PL) is observed from Tb 3+ -, Eu 3+ -, Ho 3+ -, and Sm 3+ -based compounds with Tb and Eu compositions exhibiting high PL quantum yields of 90–100%; Nd 3+ -, Tm 3+ -, Yb 3+ -, and Er 3+ -based crystals show fascinating near-infrared emission. Light-emitting diodes (LEDs) fabricated with (DFPD) 4 TbCl 7 yield characteristic emission of Tb 3+ , representing the first demonstration of electroluminescence from these organic-inorganic Ln 3+ -based metal halides. Moreover, these materials exhibit distinct excitation wavelength-dependent emission after alloying with different Ln 3+ ions, making them interesting for multicolor display and multilevel information encryption applications. It is foreseen that this study will open up the way to a possible design of robust optoelectronic devices based on lanthanide metal halides.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）