Fe3+激活发光材料/近红外发光材料研究进展

… safety of the material. Therefore, developing Fe 3+ -activated NIR phosphors based on low-… [27] offers a rigid three-dimensional structure and a wide band gap suitable for luminescent …

Fe3+‐doped MgGa2O4 (MGO: Fe3+) spinel‐type near‐infrared (NIR) phosphor with non‐toxicity, outstanding thermal stability, and tunable emission has recently gained great concern owing to its wide applications. Nevertheless, the existence of detrimental O defects in the MgGa2O4 host and the forbidden d‐d transitions of Fe3+ lead to unsatisfactory luminescence efficiency, limiting the commercial application. In this study, a vacancy repairing engineering has been innovatively developed via F− substitution in MGO: Fe3+ (MGOF: Fe3+) for significantly enhancing NIR emission and maintaining outstanding thermal stability. Specifically, F− substitution with a similar radius effectively repairs the intrinsic O vacancy defects of MGO, thereby prohibiting the detrimental electron‐capturing effect. Meanwhile, F− incorporation can make the lattice of MGO distort and break the forbidden transition of Fe3+. Significantly, the obtained MGOF: Fe3+ presents a 16‐fold higher emission intensity than that of MGO: Fe3+. More important, the MGOF: Fe3+ can remain at 91.17% (363 K) and 85.10% (423 K). Finally, the NIR emission of MGOF: Fe3+ can be used for night vision, non‐destructive biological tissue detection, and food analysis. The proposed vacancy repairing strategy can certainly stimulate some new thoughts and concepts in designing high‐performance phosphors for wider applications.

Near‐infrared second region (NIR‐II, 1000–1600 nm) has deeper penetration depth, higher sensitivity, and spatial resolution than NIR first region (NIR‐I, 700–1000 nm). However, Cr3+ and Ni2+‐doped NIR‐I/NIR‐II phosphor with serious pollution and toxicity issues pose limitations for the application of these phosphors. Here, the Fe3+‐doped Cs2NaLuCl6 is reported by grinding‐sintering method, which shows the broadband emission in the range of 1000–1600 nm with a FWHM of ≈309 nm, while the PLQY as 17.29%, under 395 nm excitation. The unique broadband emission of this phosphor originates from the activation center of Fe3+ located in an environment with an extremely weak octahedral crystal field provided by the Cs2NaLuCl6 lattice. A NIR pc‐LED device is assembled with the optimal phosphor encapsulated with a commercially available 395 nm ultraviolet LED chip. Which shows a NIR output of 23.5 mW and an electro‐optical conversion efficiency of 6.53% under 100 mA driving current, while the potential application of NIR pc‐LED is demonstrated in the field of night vision, bio‐imaging, large‐scale detection, and information anti‐counterfeiting with high‐resolution imaging.

… materials should exhibit emission at extended wavelengths (exceeding 800 nm), adjustable luminescence … the inherent limitation of single-ion-activated systems. This work provides a …

… More importantly, Cr 3+ exhibits anti-TQ phenomenon in some matrices—its luminescence … is rapidly activated during heating process. This leads to a sharp decay in luminescence …

… We systematically studied the photoluminescence characteristics, luminescence thermal stability, and laser-driven luminescence properties of the Fe 3+ -activated BaZrO 3 phosphors. …

Abstract Developing broadband near-infrared (NIR) luminescent materials is critical demand in the advanced optoelectronics field. Fe 3+ -doped broadband NIR luminescent materials …

Near‐infrared(NIR) mechanoluminescence(ML) materials are promising for biomedical use due to their strong tissue penetration and low photodamage, yet biocompatible NIR emitters remain scarce. Although Fe 3+ is biologically benign, its available luminescence modes are limited, particularly lacking bright ML. Here we report Y 3 Sc 2 Ga 3 O 12 (YSGO):Fe 3+ as the first Fe 3+ ‐doped efficient multimodal NIR luminescent material with high self‐recovering ML brightness. The phosphor emits intense 782 nm NIR light under 409 nm excitation with a quantum yield of 59.26%, and after UV pre‐irradiation for 30 min, it exhibits persistent luminescence for up to 12 h. These properties enable applications in real‐time biomechanical monitoring and secure information storage. This work provides a new pathway for bio‐friendly multimodal NIR materials and establishes an effective Fe 3+ doping strategy for achieving high‐brightness NIR ML.

… activated NIR-emitting NaYF4:Nd nanoparticles (1,064 nm emission) are used for imaging6. … transmitted across the cell membrane of microorganisms during Fe(III) respiration, the Fe3+-…

… Phosphor-converted near-infrared light-emitting diodes (NIR pc-LEDs) are finding applications in various fields including food quality analysis, biomedical imaging, night vision, and …

… Recently, the NIR phosphor converted light emitting diodes (NIR … , Fe 3+ , Cr 3+ , Cr 4+ and Ni 3+ achieve broadband NIR emission … Among them, Cr 3+ -activated phosphors can absorb …

… Here, a broadband Cr 3+ activated LiScSnO 4 (LSS) … NIR LED, typical broadband full-spectrum emitters such as tungsten filament lamps and halogen lamps can provide broadband NIR …

… ion are influenced by the host crystal field [11]. So, the choice of host material is very important for … The Edinburgh steady-state FS 5 spectrometer is used to study the photoluminescence …

Developing high-efficiency and broadband near-infrared (NIR) phosphors is a core demand in the field of advanced optoelectronics. However, achieving the synergistic improvement of their quantum efficiency and thermal stability remains a critical challenge awaiting breakthrough. In this study, the Mg3Ga2GeO8:Fe3+ phosphor was selected as the research system, and a modification strategy via Al3+ substitution for Ga3+ was proposed. This strategy successfully realized the structural transformation of the material from a single-phase structure to a single-particle multiphase structure, while significantly optimizing its NIR luminescent performance and thermal stability. The single-particle multiphase phosphor obtained via multiphase engineering exhibits excellent quantum yield (92.6%) and thermal stability (89.4%@150 °C). Integrating this single-particle multiphase phosphor with a 365 nm near-ultraviolet chip yielded an NIR phosphor-converted light-emitting diode (pc-LED). The device exhibited a stable NIR output power of 1.97 mW at a working current of 120 mA and possesses biological tissue penetration capability, demonstrating promising application potential in night vision imaging, noninvasive blood vessel visualization, and other fields. This study confirms that inducing the formation of a single-particle multiphase structure via ion substitution is an effective strategy for optimizing the comprehensive performance of Fe3+-doped phosphors, providing important insights for the design and development of high-performance NIR phosphors.

The practical implementation of mechanoluminescent (ML) materials in applications such as pressure sensing, energy harvesting, and human‐machine interaction is contingent upon achieving higher emission efficiencies. This work reports the design of an inorganic‐organic composite material with high ML efficiency achieved by co‐doping Mn2+ and Fe3+ in ZnS microparticles and incorporating them into a porous poly(vinylidene fluoride‐co‐hexafluoropropylene) matrix. The co‐doping of Mn2+ and Fe3+ effectively modifies the bandgap structure of ZnS, enabling an energy transfer process that enhances not only mechanoluminescence but also photoluminescence and afterglow emission. Additionally, the polymer substrate, benefiting from its porous structure, generates a local piezoelectric field that further amplifies the ML emission of the doped ZnS microparticles. The resulting composite membrane, characterized by significantly enhanced emission intensity and tunable, repeatable responses to external force, is anticipated to unlock new possibilities for ML materials in smart sensing and advanced display applications.

… 2a depicts the DRS and photoluminescence excitation/emission (PLE/PL) spectra of the typical phosphor with x=0.036. It is evident from DRS that the strong absorption band peaking at …

… Many double perovskite-type [A 2 BB′O 6 ] host materials are used to prepare Mn 4+ -… The photoluminescence excitation (PLE) and photoluminescence (PL) spectra were measured …

Fe3+ is a promising dopant for designing near‐infrared (NIR) phosphors due to its broadband emitting, non‐toxic, and inexpensive properties. However, the 4E (4D) and 4E + 4A1 (4G) levels of Fe3+ ions are independent of the crystal‐field parameter, and the spectral regulation has become a huge challenge. Herein, a broadband NIR‐emitting phosphor Ca2.5Hf2.5(Ga, Al)3O12: Fe3+ is successfully developed toward long‐wave ultraviolet (LWUV) light‐pumped NIR phosphor‐converted LED (pc‐LED). Significantly, the excited transition reverse of Ca2.5Hf2.5Ga3O12: Fe3+ can be realized by simply adjusting Fe3+ concentration, which results in the largely enhanced excitation around 410 nm and matches well with the commercial LWUV LED. Moreover, Ca2.5Hf2.5Ga3O12: Fe3+ can exhibit a broadband NIR emission centered at 770 nm with optimized doping content at 0.01 mol%, which are demonstrated to ascribe to Fe3+ occupying both octahedral Hf 4+ and tetrahedral Ga3+ sites. Further, a simple cation modulation strategy is proposed to successfully break the lattice symmetry around Fe3+ ions and largely enhance the NIR‐emission intensity to 200% as much as before. Finally, a NIR pc‐LED is fabricated by employing Ca2.5Hf2.5Ga3O12: Fe3+, Al3+ coating on a 410 nm LED chip, which shows great potential in non‐destructive inspection applications.

This study reports on the synthesis of Fe3+-activated Sr9Al6O18 nanophosphors (SAO:Fe NPs) using a simple solution combustion process, which emits a pale green light and possesses excellent fluorescence properties. An in-situ powder dusting method was utilized to extract unique ridge features of latent fingerprints (LFPs) on various surfaces using ultra-violet 254 nm excitation. The results showed that SAO:Fe NPs possess high contrast, high sensitivity, and no background interference, enabling the observation of LFPs for longer periods. Poroscopy, which is the examination of sweat pores on the skin's papillary ridges, is important in the identification process, and the YOLOv8x program based on deep convolutional neural networks was used to study the features visible in FPs. The potential of SAO:Fe NPs to ameliorate oxidative stress and thrombosis was analyzed. The results showed that SAO:Fe NPs have antioxidant properties by scavenging 2,2-diphenylpicrylhydrazyl (DPPH) and normalized the stress markers in NaNO2-induced oxidative stress in Red Blood Cells (RBC). In addition, SAO:Fe inhibited platelet aggregation induced by adenosine diphosphate (ADP). Therefore, SAO:Fe NPs may have potential applications in advanced cardiology and forensic sciences. Overall, this study highlights the synthesis and potential applications of SAO:Fe NPs, which can enhance the sensitivity and specificity of fingerprint detection and provide insights into developing novel treatments for oxidative stress and thrombosis.

Owing to the extensive use of lithium compounds in various strategic emerging fields, the global demand for lithium minerals has surged in recent years. However, the existing spectroscopic techniques tend to be time‐consuming and inefficient. As a result, there is an urgent need for the development of efficient and rapid methods for identifying lithium ores. Here, by choosing the environment‐friendly Fe3+ ions as activators and ZnAl2O4 (ZAO) spinel oxide as the host, the novel Li+‐sensitive materials of Zn1‐xLixAl2O4:Fe3+ (ZLAO:Fe3+) near‐infrared (NIR) phosphors are synthesized. The oxygen vacancy defect levels are reduced due to the occupation of interstitial sites by Li+, thus prohibiting detrimental electron trapping. Meanwhile, the site preference and valence state of Fe ions are altered by Li+ doping, resulting in more efficient utilization of excited electrons by Fe3+ in the octahedral sites for radiative transitions. Notably, the optimal ZLAO:Fe3+ (x = 0.4) phosphor presents a 53‐fold higher NIR emission intensity than that of ZAO:Fe3+ and an outstanding thermal stability (86%@373 K, 74%@423 K). The NIR ceramic plates sensitive to additional Li+ are fabricated and their application in identifying lithium bearing ores is demonstrated. The proposed strategy initiates a new way to design Fe3+‐activated NIR materials for multifunctional applications.

Phosphor‐converted near‐infrared (NIR) LEDs are becoming increasingly demanded as miniature, portability, and broad emission spectrum. In this work, a class of Fe3+‐activated double perovskite structured is reported ALaBB′O6 (A = Ba, Sr, Ca; B–B′ = Li–Te, Mg–Sb) phosphors. Through the co‐substitution strategy at the A‐site and B‐B' sites, the emission spectral intensity and position of Fe3+ ions can be tuned. Finally, by utilizing Ca2+ at the A‐site and Mg–Sb co‐substitution for Li–Te, long‐wave NIR emission centered at 995 nm in CaLaMgSbO6: 0.6%Fe3+ with a full width at half maximum of 147 nm and internal quantum efficiency of 54.05% is achieved. The effects of the double perovskite crystal structure on Fe3+ photoluminescence properties are comprehensively analyzed. NIR LEDs are fabricated by encapsulating UV chips with the synthetic CaLaMgSbO6: 0.6%Fe3+ phosphors, and their application value in night vision, nondestructive biological monitoring, and NIR detection is evaluated.

The near‐infrared (NIR) persistent luminescence (PersL) materials have attracted widespread attention owing to the unique self‐sustained light with good penetrability. Currently, most of the reported NIR PersL materials are activated by Cr3+. Considering the potential toxicity of chromium ions, there is an urgent requirement to explore the Cr3+‐free NIR phosphors. Herein, a novel NIR phosphor Sr2LuSbO6:Fe3+ (SLSO:Fe3+) is prepared and its luminescence properties are systematically studied. The Fe3+‐activated Sr2LuSbO6 exhibits a long‐wavelength NIR emission band centered at 890 nm with a 110 nm full‐width at half maximum (FWHM), and its PersL can last over 18 h. The phosphor shows excellent PersL stability even after being dispersed in solutions of different environments for 7 days. Furthermore, the PersL emitted by the phosphor can penetrate the 2 cm thickness beef, evidencing its good NIR PersL penetration property. This work provides a novel NIR PersL materials based on Fe3+ luminescence for technological applications and also contributes to accelerate the development of new‐generation Fe3+‐doped NIR PersL phosphor toward versatile applications.

… The most common one is CIE1931, where colour coordinates of the phosphor (x, y) are represented as the colour spaces, calculated by the following equation:(1) x = X X + Y + Z ; y = Y …

… In contrast to thermochromic behavior, near-infrared (NIR)-triggered color switching … average fluorescence lifetime (τ 0 ) of Zn-CDs was adopted to calculate the quenching rate constant (…

… Modulating transitions involving (n, π*) orbitals in the excited-state electron configuration is a pivotal approach in the development of versatile organic luminescent materials. This …

… of integrating high-sensitivity luminescent monitoring with selective pollutant sequestration … were collected by filtration and used directly without any activation step. 10 mg of each In-…

… In this context, photoluminescent nanocomposite materials have … The resulting material was tested for two important … 3+ ions in aqueous media via photoluminescence quenching. The …

… With the change of the ratio between Eu and Tb ions, the transition from red light to green light was realized, and a bimetallic composite probe (Eu 0.25 Tb 0.75 -MOF) emitting yellow …

… The excitation wavelength and emission wavelength for ICG … 5.0, pH at 5.0 with near infrared ray (NIR) irradiation. The pH of … In this study, in vivo or in vitro NIR irradiation only maintains …

… The prepared La 0.8 Ca 0.2 Al 0.8 Cr 0.2 O 3 ceramic exhibited emissivity as high as 0.92 in the near-infrared band, which is 300% larger than that of pure LaAlO 3 . Moreover, Wang et …

The excessive accumulation of heavy metal ions can pose significant hazards to human health and the environment, hence the detection and removal of heavy metal ions from water bodies are essential. Generally, carbon dots (CDs) are used as a good fluorescence sensor to sense heavy metal ions. In this study, using one-step microwave method, CDs were synthesized with the traditional Chinese medicine Radix Vladimiriae as a carbon source for the first time. These CDs display excellent fluorescence properties with an average particle size of approximately 5.9 nm and a fluorescence quantum yield (QY) about 0.15. The fluorescence emission spectra were recorded at different excitation peaks with the highest intensity emission peak observed at 465 nm with an excitation wavelength of 360 nm. Interestingly, fluorescence intensities of CDs greatly decreased in the existence of Fe3+. Under optimum conditions, a good linear relationship was observed between (I0-I)/I and the Fe3+ concentration in the range of 0.2-200 μM with the correlation coefficient (R2) of 0.9992 and the limit of detection (LOD) of 62 nM. Finally, after adding Fe3+ at concentrations of 5 μM, 20 μM, and 50 μM to real water samples, the relative standard deviation and spiked recovery rates were 1.2 %-2.7 % and 99.2 %-101.6 %, respectively. Thus, a novel method for rapid detection of Fe3+ were successfully discovered.

… More recently, inorganic heterogeneous co-catalysts such as metal sulfides, metal oxides, and nonmetallic elements (boron, carbon, and phosphorus) with strong electron-donating …

The remediation of acid mine drainage (AMD) is particularly challenging because it contains a large amount of Fe3+ and a high concentration of SO42-. To reduce the pollution caused by SO42- and Fe3+ in AMD and realize the recycling of solid waste, this study used distillers grains as raw materials to prepare biochar at different pyrolysis temperatures. Calcium alginate-biochar composite (CA-MB) was further synthesized via the entrapment method and used to simultaneously remove SO42- and Fe3+ from AMD. The influence of different influencing factors on the sorption process of SO42- and Fe3+ was studied through batch adsorption experiments. The adsorption behaviors and mechanisms of SO42- and Fe3+ were investigated with different adsorption models and characterizations. The results showed that the adsorption process of CA-MDB600 on SO42- and Fe3+ could be well described by Elovich and Langmuir-Freundlich models. It was further proved by the site energy analysis that the adsorption mechanisms of SO42- onto CA-MDB600 were mainly surface precipitation and electrostatic attraction, while that of Fe3+ removal was attributed to ion exchange, precipitation, and complexation. The applications of CA-MDB600 in actual AMD proved its good application potential. This study indicates that CA-MDB600 could be applied as a promising eco-friendly adsorbent for the remediation of AMD.