Advanced Optical Materials
·
2024
·
IF 8
Rongyi Kuang,Huiwang Lian,Yunfei Zhu,Simin Gu,Lin Huang,Bo-Mei Liu,Jing Wang
Inorganic photochromic luminescent materials hold immense promise as potential candidates for optical information storage applications. Unfortunately, static and single reading mode of photochromic luminescent materials in bright and dark environments pose a security threat to the stored information. Here, a novel material La 2 MgSnO 6 :Er 3+ ,Fe 3+ is developed, possessing both reversible photochromic and adjustable upconversion/downconversion photoluminescent (PL) properties. Upon exposure to 275 nm ultraviolet (UV) light, the sample changes in color from white to brown. And this transformation rapidly reverses when exposed to 365 nm UV light, resulting in a corresponding alteration in luminescence intensity. Notably, when combined with photochromic, the 980 nm excited upconversion PL maintains stable luminescence, while the 365 nm excited downconversion PL exhibits significant intensity changes. Inspired by this unique feature, a dark-field selective dual-mode reading is proposed that depends on the excitation wavelength, including static decrypt in long-time cases and dynamic reading in time-limited situations. These findings have the potential to revolutionize high-security data storage applications and drive advancements in the field.
研究领域:
材料科学
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光电技术
·
信息技术
·
光子学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Xiaohui Lai,Zhiyong Fang,Jian Zhang,Bo Wang,Wenfeng Zhu,Rui Zhang
A novel BaLu 2 Al 2 Ga 2 SiO 12 :Ce 3+ persistent phosphor was designed and synthesized through hetero-valence substituting Ba 2+ -Si 4+ ion pair for Lu 3+ -Al 3+ one in the Lu 3 Al 3 Ga 2 O 12 . XRD and Rietveld refinement results confirm the garnet typed crystal structure. SEM information shows that the constituent elements are uniformly distributed on the irregular particles. Under 360 or 430 nm excitation, the samples exhibit broad emission bands peaking at 510 nm. The luminescence intensity reaches to the maximum at 6 mol% Ce 3+ doping content, and an internal quantum efficiency of 51.2% is achieved. The concentration quenching between Ce 3+ ions is mainly originated from exchange interaction. Moreover, the phosphors exhibit bright cyan afterglow for minutes after removing the blue-light excitation source. The persistent luminescence decay process is studied by thermoluminescence spectra. The persistent luminescence mechanism and optical information writing and reading process are also discussed to explore the application in optical information storage.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yongsheng Sun,Xinquan Zhou,Zhenjie Lun,Kai Han,Puxian Xiong,Zhiguo Xia
Multi-mode luminescence tuning through in situ crystallization of topological glass holds significance for photonics applications. Here, NaAlSiO 4 :Eu 2+ -based glass ceramics are presented as stable persistent luminescence (PersL) materials by controlling the phase transformation in Eu 2+ doped Na 2 O-Al 2 O 3 -SiO 2 from amorphous glass to crystalline nepheline phase. X-ray and UV excited PersL colors from blue to yellow are realized by adjusting the crystallization duration time, and trap statuses reveal the dynamic PersL process with a trap redeployment from 0.83 to 1.09 eV during the transformation. Optical information storage model is constructed with a structure of stacked emitting layers to enhance storage capacity. X-ray excited luminescence time-lapse imaging is further demonstrated with optical memory longer than 5 days. These findings advance the development of superior stable PersL glass ceramics and offer optical manipulation tactics for multi-mode optical information storage applications.
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
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Ying Lv,Wuqiang Li,Chaofeng Li,Yu Liu,Cunjian Lin,Zhongyuan Li,Shihai You
The commercial blue persistent luminescent (PersL) phosphor (CaAl2O4:Eu2+,Nd3+) is renowned for its exceptional PersL duration, but it is hampered by its poor chemical stability. There is an urgent need to develop blue PersL phosphors that can combine the excellent PersL property with robust stability. In this work, we report on a series of highly stable Ce3+-doped oxynitride PersL phosphors. Notably, BaSi3Al3O4N5:Ce3+ has been identified to contain two distinct types of defects in the host: one associated with photoluminescence (PL) and the other with electron trapping and detrapping dynamics. These intrinsic defects have been systematically investigated and confirmed by analyzing both PL and PersL spectra, which could be generated by nitrogen deficiency and the existing oxygen vacancy in BaSi3Al3O4N5. BaSi3Al3O4N5:Ce3+ has a widely distributed trap from 0.21 to 1.02 eV, with a peak at 0.63 eV, as determined by the initial rise method. BaSi3Al3O4N5:Ce3+ exhibits not only excellent water-resistance stability but also superior heat-resistant stability. Leveraging its widely distributed traps and great chemical stability, we have successfully demonstrated the optical information storage ability of BaSi3Al3O4N5:Ce3+ by using a gradual optical writing method. This comprehensive study provides valuable insights into the development of stable oxynitride PersL phosphors for potential applications in optoelectronic devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
An-Quan Xie,Jiazhuang Guo,Liangliang Zhu,Su Chen
Photonic crystals (PCs) with crack-free morphology, high-saturated structural color and sensitivity to circumstances are expanding their applications in painting, sensor, optical coding and information technology. Herein, we incorporated functionalized carbon dots (CDs) onto polystyrene@poly(methyl methacylate-co-acrylic acid) (PS@P(MMA-AA)) colloidal particles via strong covalent bonding. Thanks to the abundant hydrogen bonding groups on the CDs, as-prepared CDs/PS@P(MMA-AA) PC film exhibits highly-crystalline morphology, brilliant structural color and fluorescence characteristics. By means of microfluidics technique, CDs/PS@P(MMA-AA) PC supraballs with angle-independent structural color for optical display and encoding are also demonstrated. Moreover, the magnetism/optics dual-functional Janus and hierarchical molecular-analogue supraballs are fabricated through the triphase microfluidic device and magnetism-induced assembly, bringing about a switchable behavior of PC supraballs in external magnetic field, which are further employed as the pixel points in the panel to store and display the quick response (QR) code information. Ultimately, combined with sensitive hydrogel, the CDs/PS@P(MMA-AA) PC hydrogel is not only imparted with an intriguing mechanochromic property, but also showing the rapid response to pH value. The CDs promoted PS@P(MMA-AA) PCs with various attractive optical properties offer a potential strategy of robust PC film/supraball construction for anti-counterfeiting, optical display, sensors and antireflection coatings.
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
Advanced Optical Materials
·
2021
·Vol. 10
·期 2
·2101268
·
IF 9.926
Mengyao Pan,Chengyu Wang,Yuefan Hu,Xin Wang,Lei Pan,Yipeng Lin,Lei Shang,Hongbo Xu,Jiupeng Zhao,Yao Li
Invisible photonic patterns based on responsive photonic crystals show great potential in structural-color encryption. However, single inherent information (structural color) encryption/decryption means and the incomplete invisibility in normal conditions greatly limit further development in high-precision encryption. Here, a novel invisible photonic pattern encrypted/decrypted by dual optical information (structural color and brightness) is reported. It is prepared by engineering an extremely large wettability difference into the patterned and unpatterned regions of a vapor-responsive inverse opal film. The same optical properties and the distinct wettability difference between the two regions not only ensure that the pattern encrypted by structural color and brightness in the normal state can be entirely hidden under the microscope, but also ensure that it can be decoded by large color contrast (Δλ = 26–32 nm) and brightness contrast (Δ B = 48–57.6) under flowing water vapor state. The unique invisible photonic pattern, reported for the first time, can inject new life into structural color-based encryption.
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
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Hong Li,Junfeng Zheng,Yanpeng Dai,Dongying Li,Xiangting Zhang
CdSiO 3 , with its distinctive crystal structure, has become a subject of considerable interest as a potential silicate host for long persistent luminescence (LPL) phosphors. However, in most cases, impurity phases in the host adversely affect the persistent luminescence (PersL) performance. Furthermore, there is still a lack of insightful understanding regarding the role of non-rare-earth (non-RE) In 3+ ions in the enhanced blue PersL of CdSiO 3 . Here, pure-phase monoclinic CdSiO 3 phosphor is synthesized through a solid-state reaction method and the intense blue PersL is achieved by aliovalent doping of In 3+ . Combining experimental results with theoretical calculation, we reveal that the intrinsic defects of O and Cd vacancies in CdSiO 3 are the trap centers for excited electrons and holes, respectively. In 3+ doping adjusts the distribution and increases the density of intrinsic defect-related traps, thus producing the intense blue PersL in CdSiO 3 :In 3+ . Moreover, the generality of In 3+ in enhancing the PersL properties is validated in CdSiO 3 :Mn 2+ ,In 3+ and CdSiO 3 :RE 3+ ,In 3+ (RE = Tb, Dy, Pr, Sm, Eu) phosphors, enriching the spectrum of PersL emission colors. Encouraged by the outstanding optical properties of CdSiO 3 :Mn 2+ ,In 3+ , we demonstrate dual-mode information storage-reading and dynamic information encryption applications. This advancement opens new avenues for the application of optical information security. This work emphasizes the key role of In 3+ in adjusting the distribution and increasing the density of intrinsic defect-related traps. Consequently, it reveals a clear mechanism for enhancing PersL through In 3+ doping and expands the range of LPL phosphors with broad spectral selectivity.
研究领域:
材料科学
·
光学工程
·
信息加密技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhumin Yu,Kai Zhao,Yanbo Zhao,Mengyue Wu,Rong Qian,Xinzhou Wu,Wenming Su,Yuan-Qiu-Qiang Yi,Changqing Ye,Yanlin Song
Multi-dimensional anti-counterfeiting technologies possess multiple color/pattern variations under different conditions, opening up new avenues in information security. Herein, inspired by the blue-ringed octopus, novel multi-dimensional anti-counterfeiting devices are reported by combining electrochromism and structural color with different coloration mechanisms, that is, by introducing colloidal photonic crystals (PCs) in electrolyte of the electrochromic devices (ECDs). Through actively manipulating voltage or passively changing environment background, the degree of light reflectance and transmittance of PCs can be finely modulated, thus realizing the display and hiding of structural colors of devices. Besides, they also feature distinct color evolution under different viewing angles, enabling more optical information to be carried. Laser-etched patterned devices have also been successfully achieved, showcasing superior triple anti-counterfeiting abilities in terms of optical information. Notably, such inherent patterns can further be innovatively switched to different preset background patterns through the synergy of voltage stimulation and background colors. Based on this, a high-level anti-counterfeiting system has been demonstrated, providing the ability to deliver multiple distinct optical information on-demand. It is believed that such strategy of combining electrochromic and structural color will pave a new platform for designing advanced multi-dimensional anti-counterfeiting devices.
研究领域:
材料科学
·
光学工程
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Liang Liang,Yulong Ye,Heyi Yang,Qinan Mao,Yang Ding,Fang Chen,Meijiao Liu,Jiasong Zhong
Tunable long persistent luminescence (LPL) phosphor materials have great potential for optoelectronic cryptographic applications. However, the mainstream techniques of modulating LPL generally have the characteristics of complex preparation processes, demanding crystal field environments, or expensive dopant ions, which restrict large-scale commercial application. Herein, we develop a simple, high-efficiency, and low-cost strategy to optimize the LPL of LiGaO2(LGO):Cu2+ by changing the sintering time to regulate the degree of crystal structure distortion. The Cu2+ as charge compensation will substantially enhance the emission intensity of LGO by a factor of 11.02 originating from the appropriate ionic size and coordination mode. Besides, the LPL time of LGO:Cu2+ can be extended effectively to 2 h by adjusting the sintering temperature and time (900 °C@24 h). The extension mechanism is that Li and Ga can be substituted for each other more easily and induce crystal structure distortion due to the special crystal structure of LGO, resulting in an optimal trap concentration in LGO:Cu2+. Thus, our findings provide a simple way to modulate long persistent luminescence and further consider their potential impact on optical information encryption.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Linghui Shen,Tong Wei,Yongchao Shi,Xiangyu Wang,Liwei Wu,Jiao Cui,Tianyang Zhang,Hongzhi Yu,Zepeng Li
Upconversion (UC) luminescence materials with dynamically adjustable activity under external stimuli are of great interest owing to their potential applications in optical storage and high-sensitivity optical switches. Recently, photochromic (PC) effect was considered as an alternate way to regulate the UC luminescence of inorganic materials; however, external-field-induced bleaching was routinely completed by single stimulation, which limited its practical application. In this work, one kind of smart phosphor, Er-activated Bi7Ti4NbO21 intergrowth bismuth layer-structured ceramics that exhibited both intense UC green emission and prominent PC reaction, was synthesized. The UC luminescence, PC effect, and their coupling properties were researched. Interestingly, light–heat and light–light dual-controlled UC luminescence and PC processes were realized. Accompanying the PC effect, the UC luminescence can be reversibly modified by alternating 405 and 532 nm light stimulation (or thermal stimulation). Under 405 nm irradiation, the UC luminescence quenching ratio can reach up to 80.8%. Meanwhile, the UC luminescence raise ratio can respectively reach up to 426.9 and 118.1% under 250 °C thermal treatment and 532 nm light bleaching. The UC luminescence modulation was exposed to be tightly related to the irradiation coloration and thermal/light decoloration processes. Good fatigue resistance of the UC luminescence switching was also achieved. The mechanisms related to the UC luminescence modulation and PC process were discussed. These results indicated that Er-activated Bi7Ti4NbO21 samples can be adopted as a kind of optical data memory materials.
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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yiping Wu,Meng Wu,Jingjie Yu,Yuru Wang,Jinlong Wang,Yingwei Xu,Yanjie Zhang
Optical information encryption based on luminescence materials have received much attention recently. However, the single luminescence mode of the luminescence materials greatly limits its anti-counterfeiting application with high safety level. Here, a series of luminescence materials of Tb 3+ and Bi 3+ co-doped ZnGa 2 O 4 phosphors with great correspondence in photoluminescence (PL), persistent luminescence (PersL), and thermoluminescence (TL) modes was synthesized by the conventional solid-phase method for the application in multi-modal anti-counterfeiting fields. Under the excitation of 254 nm, ZnGa 1.99 O 4 :0.01 Tb 3+ , yBi 3+ (y = 0.001,0.002) sample exhibited a broad blue emission band (the transition from [GaO 6 ]) at 440 nm and the characteristic emission peaks of Tb 3+ at 495 nm, 550 nm, 591 nm and 625 nm, corresponding to the transitions of 5 D 4 - 7 F n (n = 6, 5, 4, 3), respectively. Interestingly, the co-doping of Bi 3+ ions improve the crystallinity and particle size of the phosphor, subsequently enhanced the PL intensity of Tb 3+ to 6 times that of Tb 3+ singly doped ZnGa 2 O 4 phosphor. Further, the flexible films with multi-modal luminescence properties have been fabricated through the unique TL and PersL characteristics of ZnGa 2 O 4 : Tb 3+ , Bi 3+ phosphors, including “Optical information storage film”, “snowflake and characters” and “QR code”. Moreover, a set of optical information encryption is obtained by combining ZnGa 2 O 4 :Tb 3+ , Bi 3+ phosphor and red emitting phosphor. The results indicate that ZnGa 2 O 4 :Tb 3+ , Bi 3+ phosphor with multi-modal stimulus response can be expected to be potentially used in the applications of optical information storage and anti-counterfeiting fields.
研究领域:
材料科学
·
光学工程
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Kaiming Zhu,Zhanglin Chen,Yuzhen Wang,Hui Liu,Yude Niu,Xin Yi,Yihuan Wang,Xuanyi Yuan,Guanghua Liu
Eu 2+ -doped CaAlSiN 3 ‐type structure nitrides have been extensively studied as a red-emitting phosphors in white light emitting diodes (w-LEDs), but there are few reports of systematic research on the effect of solid solution substitution on their long persistent luminescent properties. In this work, a series of (M,Ca)AlSiN 3 :Eu 2+ (M = Sr, Mg) phosphors have been successfully synthesized by efficient combustion synthesis . We investigated the effect of Sr and Mg solid solution on long persistent luminescent properties. Thermoluminescence (TL) measurements were performed in those persistent phosphors to obtain direct experimental results on the trap depth. The results show that the SrAlSiN 3 :0.2 at% Eu 2+ phosphor exhibits the most intense red persistent luminescence with the persistent time of as long as 200 min at the threshold value of 0.32 mcd/m 2 due to the presence of more trap levels with suitable depths of 0.71 eV. Compared with the solid solution of Sr, the solid solution of Mg ions can increase the depth of trap levels in CaAlSiN 3 . Among them, Mg 0.2 Ca 0.8 AlSiN 3 :0.2 at% Eu 2+ phosphor achieved a maximum trap depth of 0.98 eV, making it a promising candidate for optical information storage applications.
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
危险品化学品经营许可证（带存储）