7F2 Transition Research Articles

Linear energy transfer dependence of scintillation properties of CeF3

To elucidate the linear energy transfer (LET) effects on the scintillation properties of a self-activated scintillator, CeF3, from an aspect of excited state dynamics, we observed the scintillation time profiles of CeF3 under irradiations of pulsed beams having different LETs. The initial decay was faster for higher LET, which in line with the LET dependence observed for other self-activated scintillators in previous studies. The faster decay at higher LET can be explained in terms of competition between the scintillation caused by 5d–4f transition of Ce3+ ions and quenching owing to the interaction between excited Ce3+ ions close to each other.

Radiation response properties of Ce-doped CaF2 transparent ceramics

We report on the luminescence properties of CaF2 transparent ceramics having various concentrations of CeF3 (0.1 %, 0.5 %, and 1 %). Scintillation emissions centered at approximately 318, 345, and 386 nm derived from the 5d→4f transition of Ce3+ were detected, and scintillation light yields were determined to be 8600 photons/MeV (0.1 % CeF3), 1930 photons/MeV (0.5 % CeF3), and 1850 photons/MeV (1 % CeF3) under gamma-ray irradiation from 241Am. The Ce-doped CaF2 transparent ceramics showed thermally stimulated luminescence (TSL) with a broad glow peak at around 115–145 °C, and their dose response curves were determined over a broad dose range (0.01–3 mGy). Moreover, optically stimulated luminescence (OSL) exponential decay curves were obtained under 500 nm stimulation light, and dose response curves were obtained in the dose range of 0.1–100 mGy. The minimum detectable dose was estimated to be 0.1 mGy. A direct correlation between scintillation light yields under gamma-ray irradiation and TSL/OSL intensities was demonstrated.

Oxysulfate, oxysulfide, and oxide red-phosphors from one single hydroxyl sulfate precursor (Gd,Eu)2(OH)4SO4⋅nH2O: Phase evolution, and photoluminescence

Three kinds of important red phosphors, the monoclinic Ln2O2SO4 (Ln = Gd, Eu), cubic Ln2O3 and hexagonal Ln2O2S were obtained through controlled calcination of single hydroxyl sulfate Ln2(OH)4SO4⋅nH2O (LLnHs) precursor. The conditions of the hydrothermal synthesis of LGdHs were investigated, and it was found that LGdHs can be obtained in pH range of 7–9. The micro-morphology changes from aggregated spheres to micro plates with increasing pH. Gd2(OH)4SO4⋅nH2O was transformed into Gd2O2SO4via removal of hydration water (up to 340 °C) and dehydroxylation (340–800 °C), and finally change into Gd2O3via desulfuration (800–1230 °C) in the air. Gd2O2S was obtained from Gd2(OH)4SO4⋅nH2O by calcination in reducing atmosphere (800–1200 °C). Photoluminescence excitation (PLE) studies showed broad and strong O-Eu CT bands at 260, 275, and 267 nm in Ln2O3, Ln2O2SO4 and Ln2O2S, respectively, and extra S-Eu CT band locates at 334 nm was observed in Ln2O2S. The strongest red emission corresponding to the electric dipole 5D0 → 7F2 transitions of the Eu3+ ions were observed at 613, 618, and 626 nm in Ln2O3, Ln2O2SO4 and Ln2O2S system, respectively. The quenching concentration of Ln2O2S (3 %) is smaller than those of Ln2O2SO4 (6 %) and Ln2O3 (6 %), which is due to the fact that the average Eu3+-Eu3+ distance is smaller in Ln2O2S. The quenching mechanism was investigated, and it was found that the observed luminescence quenching was dominated by exchange interactions among Eu3+ ions.

Solid state reaction preparation of BaMg2Si4O10F2:Eu3+ synthetic-mica phosphor for latent fingerprint identification

Synthetic-mica materials have shown multifunctional performances due to their distinctive adhesion and cation exchange ability. In this work, a novel Eu3+-doped synthetic-mica named as barium tetrasilicate fluorphlogopite (BaMg2Si4O10F2) phosphor was prepared by the high-temperature solid state reaction process for the first time. The as-prepared mica samples possess a distinct lamellar structure, as indexed by X-ray diffraction, scanning and transmission electron microscopy means. The photoluminescence results manifest that the phosphor can generate bright red emission at 614 nm corresponding to the characteristic 5D0→7F2 transition of Eu3+ as excited with UV light, and the luminescence intensity is nearly 9-fold in comparison with that in original fluorphlogopite. The more fantastic result is that the emission intensity at 373 K still retains 95 % in respect to that at ambient temperature, demonstrating the phosphor system with excellent optical thermal stability. The optimal BaMg2Si4O10F2:8%Eu3+ phosphor powder has been used to discern the latent fingerprints on the surface of diverse non-porous and semi-porous substrates, which reveal the superior visibility as irradiated with 254 nm UV light. The Eu3+-doped BaMg2Si4O10F2 synthetic-mica is a promising phosphor material for latent fingerprint identification application.

Emission enhancement of Eu3+ doped Ba2Zn(BO3)2 by adding charge compensators

Ba2Zn(BO3)2: xEu3+ (0.001≤x ≤ 0.30), Ba2Zn(BO3)2: 0.15Eu3+, 0.05R+ (RLi, Na, K) and Ba2Zn(BO3)2: 0.15Eu3+, yK+ (0≤y ≤ 0.07) phosphors were prepared by high-temperature solid-phase method. The structure, photoluminescence (PL) and other characteristics of the prepared phosphors were studied by X-ray diffraction, ultraviolet–visible spectroscopy, PL spectroscopy and fluorescence lifetime. The concentration quenching mechanism of Eu3+ emission in Ba2Zn(BO3)2 host was investigated. In order to improve the PL performance of Ba2Zn(BO3)2: 0.15 Eu3+ phosphor, the effect of Li+, Na+ and K+ compensators on the PL performance of Ba2Zn(BO3)2: 0.15 Eu3+ luminescent powder was studied. Under excitation at 393 nm, a strong red emission peak is observed at 620 nm. This peak corresponds to the 5D0→7F2 transition and significantly increases its strength by adding a charge compensator. Therefore, the addition of K+ is very effective in improving the PL performance of Ba2Zn(BO3)2: 0.15 Eu3+ phosphors.

Development of Eu3+-Doped Oxyfluoride Glass for Active Laser Medium

In this work, Eu3+-doped barium sodium borate oxide and oxyfluoride glasses were fabricated by melt-quenching technique for investigated their physical, optical, photoluminescence and radiative properties. The emission spectra, observed under the 394 nm, show the emission band corresponding to the transitions of 5D0→7F1 (590 nm), 7F2 (613 nm), 7F3 (652 nm) and 7F4 (701 nm). The most intense emission band is the 5D0→7F2 transition at 613 nm. The emission light is shown the reddish-orange color according to the framework of CIE 1931 color space. The Judd-Ofelt analysis confirmed the potential for using the glass samples in this work for use as photonic applications. The results from the emission spectra and radiative properties show that the oxyfluoride glass sample has more lasing potential than the oxide glass sample.

Gamma–radiation synthesis and characterization of nanocomposite hydrogels based on poly(vinyl-alcohol)/zirconium NPs/ europium

In the present work, nanocomposite hydrogels based on poly(vinyl-alcohol)/zirconium NPs/europium (PVA/ZrO2NPs/Eu3+) hybrid films were prepared by solution casting technique and then exposed to gamma irradiation (0–65 kGy). Zirconium oxide (ZrO2) nanoparticles (NPs) doped with 5mole% Eu3+ were prepared via sol gel technique. The polymer nanocomposite films were characterized by X-ray Diffraction (XRD) analysis, Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). Furthermore, the PVA/ZrO2/Eu3+ nanocomposites were characterized for their optical properties using UV–Vis–NIR and photoluminescence (PL) spectroscopy. XRD analysis confirms the formation of ZrO2 monoclinic phase with the nanometer size (20 nm–11nm) when the γ-dose increases from 0 to 25 kGy respectively. Phase transition from monoclinic to tetragonal structure with an average particles size about 25 nm was observed when the γ-irradiation dose reaches 35 kGy. Increasing of γ-dose up to 65 kGy, a remarkable decrease in peaks intensity was observed and reappearance of the monoclinic ZrO2 phase again with average particle size about 10 nm. FTIR peaks intensity changes with increasing γ-irradiation doses. SEM observations showed that the nanocomposite film prepared at 35 kGy inhibits the agglomeration of ZrO2:Eu3+ nanoparticles in PVA host. The optical band gap energy decreases with increasing of γ-dose. PL measurements do not show any emission in the nanocomposite up to 25 kGy. However, at 35 kGy the sample exhibits characteristic orange-red emission centered at 607 nm attributed to 5D0→7F2 transition of Eu3+ ions. Further increasing of γ-dose up to 65 kGy, PL peaks intensity decreases drastically.

Photoluminescence in rare-earth based halide double perovskite Cs2NaRECl6 (RE = Ce, Eu, Y, Lu) microcrystals

Lead-free halide double perovskites (DPs) with superior photoelectric performance are of great importance in perovskites materials family. In this paper, a series of rare-earth (RE) based Cs2NaRECl6 (RE = Y, Ce–Nd, Sm–Gd, Dy–Lu) DPs microcrystals (MCs) were prepared by convenient hydrothermal method. Cs2NaCeCl6 and Cs2NaEuCl6 MCs exhibit typical UV emission from the 5d→4f transition of Ce3+ and orange-red emission from characteristic 5D1 → 7F0, 5D0 → 7F1, 5D0 → 7F2, 5D0 → 7F3, 5D0 → 7F4 transitions of Eu3+, respectively. The blue light emissions of Cs2NaYCl6 (300–650 nm) and Cs2NaLuCl6 (300–550 nm) are from the respective self-trapped exciton states (STEs). In addition, the bandgap and partial density of state (PDOS) of Cs2NaRECl6 (RE = Ce, Eu, Y, Lu) were calculated based on density functional theory (DFT) to have a further insight into the optical properties of the RE-DPs. The as-prepared RE based DPs have potential applications in advanced lighting, displaying and anti-counterfeiting, etc.

Influence of CeF3 on Ga2O3-Lu2O3-Al2O3-Y2O3-B2O3 glass for photonics material

CeF3 doped gallium lutetium aluminium yttrium borate glasses were investigated for photonics applications in this work. Their physical, structural, optical and luminescence properties were studied by the effect of CeF3 concentration. Glass density and refractive index raised with increasing CeF3 amount. The FTIR spectra and XRD pattern demonstrated that the glass network consisted of trigonal BO3 and tetragonal BO4 borate groups cooperating with metal oxides in amorphous nature, while CeF3 dopant acted as a glass modifier. Glass strongly absorbed the photons in ultraviolet region by transition of host component, superposed with the 4 f→5d transition of Ce3+ dopant. Under UV excitation, glass doped with 0.05 mol%-CeF3 performed the highest emission intensity at 391 nm by 5d→4 f transition. Due to the strong blue emission, half photons conversion ability and short decay time around 21 ns, this developed glass owns a potential for the blue light sources / medium and the ultraviolet to visible light converter.

Structural, photoluminescence and scintillation properties of Ce-doped Al(PO3)3–Sr(PO3)2–CsPO3 inorganic glass scintillators for gamma- and X-ray detection

Scintillators have been commercialized as radiation detectors in several practical applications. However, fabrication of commercial inorganic crystal scintillators is time-consuming and expensive. Herein, we report inorganic glass scintillators for gamma and X-ray detection based on phosphate glasses, with alkali and alkali earth metals in the host and Ce3+ ions as emission centers. Unlike inorganic crystals, inorganic glasses have industrial advantages owing to their low cost and ease of fabrication, which facilitate the large-scale production of scintillators. Previously studied inorganic glass scintillators for gamma and X-ray detection exhibited low light yields compared to inorganic crystal scintillators. In contrast, our glass exhibits a high light yield of 3200 photons/MeV. This light yield is higher than that of previously reported glasses, whose light yields are less than several hundred photons/MeV in most cases and approximately 2000 photons/MeV as the highest value. In addition, this glass has a relatively high density of 3.33 g/cm3 and a fast scintillation decay of approximately 30 ns, which is attributed to the 5d–4f transition of Ce3+ ions acting as emission centers. These properties are suitable for gamma and X-ray detection and this glass has the potential to expand the practical applications of inorganic glass scintillators.

Luminescence and optical thermometry strategy based on emission spectra of Li2Ba5W3O15:Pr3+ phosphors

In this study, a series of Pr3+ ions doped Lithium Barium Tungstate (Li2Ba5W3O15) was synthesized using the conventional high-temperature solid state method. The structure and phase of the phosphors were analysed using X-ray diffraction (XRD) patterns. Fourier Transform Infrared (FT-IR) spectroscopy was used to examine the different vibrational bands present. The optical band gap values of the optimized LBW phosphor and the undoped LBW sample were measured using diffuse reflectance spectra (DRS). Under 319 nm excitation, the photoluminescence (PL) spectra of the Pr3+-activated LBW phosphor exhibited strong visible blue and reddish emissions at 488 nm and 647 nm respectively corresponding to the 3P0 → 3H4 and 3F2 transitions of the Pr3+ ions. The evaluated CIE color chromaticity coordinates of the as-prepared LBW:Pr3+ phosphors lie within the white region. The temperature-dependent PL (TDPL) measurement demonstrated relatively good thermal stability for the synthesized phosphor. Moreover, the fluorescence intensity ratio (FIR) was used to analyze the optical sensing properties of the LBW:Pr1.0 phosphor. A maximum relative sensitivity (Sr) of 1.03 % K−1indicated the potential of these phosphors for optical thermometry applications. A double exponential trend with decreasing lifetime was observed in the PL decay data at 647 nm emission (λem) under 319 nm excitation (λex), with an increase in the Pr3+ ions concentration in the host matrix. In conclusion, the investigations conducted demonstrate that the Pr3+ ions doped LBW phosphors show great potential for applications in solid-state lighting and optical thermometry. Its emission characteristics, thermal stability, and optical sensing capabilities establish it as a suitable candidate for these applications.

Growth and spectral properties of a novel praseodymium-doped alpha-barium borate laser crystal

A novel Praseodymium-doped borate (Pr:α-BBO) laser crystal was grown successfully by using the Czochralski method. The phase structure, absorption and fluorescence lifetime, as well as blue laser diode (LD) pump performances of Pr:α-BBO were totally studied. The segregation coefficient and valence state of Pr ions in the crystals were investigated using inductively coupled plasma atomic emission spectroscopy and X-ray photoelectron spectroscopy. A 450 nm blue LD was employed to carry out a pump experiment on the Pr:α-BBO slab crystal with a doping concentration of 0.22 at.%. The main emission peaks of Pr3+ ions in the orange-red light band were found to be at 611.5 nm, 634.7 nm, and 638.3 nm. The experimental results show that the Pr:α-BBO crystal exhibits higher orange light fluorescence emission performance, with an emission peak intensity at 611 nm that is 2.1 times stronger than that at 635 nm due to the splitting of the 3P0→3F2 transition (635 nm). By optimizing the Pr:α-BBO laser crystal growth process and further solid-state laser experiments, it can be expected to have broad applications in laser medicine, spectral detection, and nonlinear optical frequency conversion fields.

Massive sensitisation of Eu3+ photoluminescence in NaMgF3:Eu nanoparticles by 2-thenoyltrifluoroacetone ligand exchange

NaMgF3:0.1%Eu nanocuboids capped with oleic acid were synthesised via a hydrothermal synthesis technique. Subsequent ligand exchange using 2-thenoyltrifluoroacetone resulted in a massive sensitisation of the Eu3+ photoluminescence where the intensity of the 5D0 → 7F2 transition increased by over 40 000×, relative to the oleic acid-capped nanoparticles. Large Judd-Ofelt Ω2 parameters indicated that the sensitised Eu3+ emissions originated primarily from distorted Eu3+ sites near the nanoparticle surfaces. The massive enhancement of the Eu3+ photoluminescence in 2-thenoyltrifluoroacetone sensitised NaMgF3:Eu nanoparticles encourages applications that include ultra-high resolution optical temperature sensors and dosimeters.

Erbium-Doped LiYF4 as a Potential Solid-State Frequency Reference: Eligibility and Spectroscopic Assessment

Time and frequency metrology is a key enabler for both forefront science and innovation. At the moment, atomic frequency standards (AFSs) are based on atoms either in the vapor phase or trapped in magneto-optical lattices in a vacuum. Finding a solid-state material that contains atoms suitable to be used as a frequency reference would be an important step forward in the simplification of the setup of AFSs. Lanthanide-doped inorganic crystals, such as Er-doped LiYF4, have been studied for several decades, and their intrashell 4f transitions are usually identified as ultra-narrow. Nevertheless, a systematic characterization of these transitions and their linewidths with a correlation to the dopant’s concentration and isotopic purity at low temperatures is lacking. In this work, we studied Er-doped LiYF4 as a potential benchmark material for solid-state frequency references. We chose Er as it has a set of transitions in the telecom band. The influence of Er concentrations and isotope purity on the transition linewidth was systematically studied using high-resolution optical spectroscopy at 5 K. The results indicate that the material under study is an interesting potential candidate as a solid-state frequency reference, having transition linewidths as low as 250 MHz at ~1530 nm.

Spectral Analysis for the Complexation of Nd(III) with L-Tryptophan and L-Isoleucine in the Presence/Absence of Mg2+: 4f–4f Transition Spectra As Probe

Spectral Analysis for the Complexation of Nd(III) with L-Tryptophan and L-Isoleucine in the Presence/Absence of Mg2+: 4f–4f Transition Spectra As Probe

Structural Features, Emission Analysis, and Covalency Comparison of Neodymium Acylpyrazolone Complexes using Oscillator Strengths, Covalency and Judd‐Ofelt Parameters**

AbstractThree distorted square antiprismatic eight coordinated neodymium acylpyrazolone complexes were synthesized having the compositions [Nd(L1)3(H2O)(EtOH)] (NdL1), [Nd(L2)3(H2O)(EtOH)] (NdL2), and [Nd(L3)3(H2O)(EtOH)] (NdL3). The structure of all three complexes was examined using ESI‐mass, FT‐IR, and thermogravimetric methods. According to the single crystal analysis of NdL1, the complex was found eight‐coordinated (NdO8) with a distorted square antiprismatic geometry. A powder XRD pattern confirmed a similar structural arrangement of the other two complexes. In electronic absorption spectra, the transition 4G5/2←4I9/2, which is close to the centre of the visible spectrum (~17,500 cm−1), exhibits hypersensitivity, which stands out in stark contrast to the behaviour of many other typically weak and reliably unchanging, typical 4f–4f transitions. Through a comparative analysis of calculated oscillator strength, Judd‐Ofelt parameters, root mean square deviation, radiative lifetime and covalency parameters in various solvents, hypersensitivity, symmetry characteristics, and covalency have been thoroughly investigated. The promotion of 4f–4f electric‐dipole intensity has been found to be particularly successful with ethanol, pyridine, DMF, and DMSO. Utilizing Judd‐Ofelt Ω4 values and Hirshfeld analysis, long‐range secondary π⋅⋅⋅π stacking or H‐bonding interactions were investigated. The intensity of emission spectra, quantum yield, stokes shift, and antenna effect energy diagram was examined using solid‐state emission spectra.

Luminescence properties and high energy transfer of Ca9MgNa (PO4)7: Eu2+, Mn2+ blue-red dual emission phosphor for plant growth LEDs

The Ca9MgNa(PO4)7: Eu2+, Mn2+ (CMNPO: Eu2+, Mn2+) phosphors were successfully prepared via high-temperature solid-phase method. Under near ultraviolet light (n-UV) excitation, CMNPO: Eu2+, Mn2+ phosphor exhibits blue and red double emissions centered at 419 nm and 642 nm due to Eu2+: 5d → 4f transition and Mn2+: 4T1(4G) → 6A1(6S) transition, respectively, which match well with the chlorophyll a and b absorption spectrum required for plant growth. The energy transfer (ET) efficiency between Eu2+ and Mn2+ ions was analyzed and is as high as 90.0%. Besides, the luminescence mechanism and ET process of the phosphors were explained according to the simple energy level diagram of Eu2+ and Mn2+ ions. In addition, it was also found that the phosphor has good thermal stability (the luminescence intensity maintains 77.4% at 423 K). Finally, a LED device was packaged with the obtained phosphor Ca9MgNa(PO4)7: 0.03Eu2+, 0.23Mn2+ and a commercial 365 nm n-UV chip, and the corresponding color rendering index Ra and the correlated color temperature (CCT) is 83.6 and 1842 K, respectively. The results show that the optimized phosphor has good application potential in plant cultivation LEDs.

Probing the effect of Y3+/Gd3+ on the optical properties of Gd2-xYxTiO5:Eu3+: Insight into local site-luminescence correlation

Phosphor converted light emitting diodes (pcLEDs) are considered as the most efficient materials to resolve the issue of energy scarcity. In this regard, the design of an efficient red phosphor could be a game changer due to the lack of the same in the current existing phosphor library. Here in this work, we have investigated high color purity, moderate photoluminescence quantum yield (PLQY) and long excited state lifetime red emitting Gd2-xYxTiO5:1.0 %Eu3+ phosphor with varying Y3+/Gd3+ ratio. It was found that higher Y3+ containingGd0.5Y1.50TiO5:1% Eu3+ emerged victorious in terms of luminescence intensity, asymmetry ratio and PLQY ∼ 10 %. Higher PLQY of this particular composition has been attributed to lowest non-radiative channels in them. The same has been further supported by PALS as it suggested lowest defect density in Gd0.5Y1.50TiO5:1% Eu3+ as most of the vacancies have moved out of the lattice to the surface and is responsible for improved optical properties as defect triggered non-radiative pathways reduced significantly. The O2–→ Eu3+ charge transfer energy on the other hand eases in higher gadolinium counterparts owing to more structural distortion of distorted pentagonal bipyramid (DPB) and distorted hexagonal bipyramid (DHB) in them. Based on the number of Stark components of 5D0→7F0 there are two types of Eu3+ with distinct chemical environments. It was inferred that longer lived trivalent europium ions are the one located at a less distorted DPB whereas short lived Eu3+is ascribed to the one occupying a highly distorted DHB. The trend in Judd-Ofelt parameter Ω4 < Ω2 revealed that Eu3+ ions are localized in high asymmetric locations in all the samples under the doping level used in this work. The high branching ratio of 5D0→7F2 transitions for all the samples reflected in very high color purity of more than 99 %. These results suggest that Eu3+doped A2TiO5 luminescent crystals with moderate PLQY, high red color purity and long excited state lifetime could serve as efficient red phosphor and with further improvement can be potential candidate for various applications.

Coordination effect enhanced visualization of latent fingerprint with Eu (TTA)3phen-SiO2 microspheres

Latent fingerprint (LFP) powders are crucial in the detection of LFPs in forensic science. However, it is often plagued by poor image resolution and low contrast. Herein, enhanced LFP fluorescence (FL) visualizations are achieved by doping Eu(III) coordination compound Eu(TTA)3phen directly into SiO2 microspheres instead of Eu(III) ions. Using the synthesized Eu(TTA)3phen-SiO2 microspheres, the fine characteristic structure of LFP can be seen and recognized under 365 nm irradiation, up to Level 3. However, the Eu3+-SiO2 microspheres were difficult to recognize the Level 2,3 fingerprint structure. The difference between the ridge and furrow gray values of Eu(TTA)3phen-SiO2 microspheres is 2.1 times that of Eu3+-SiO2 microspheres. The coordination effect increased the asymmetry around Eu(III) ions, resulting in the ultrasensitive 5D0→7F2 transition, thus increasing the FL intensity, and the uniform doping of the Eu(III) coordination compound into SiO2 also reduced the surface FL quenching due to shielding from oxygen. Under this dual effect, the LFP performance of Eu(TTA)3phen-SiO2 microspheres has been significantly improved. We believe that this novel and easy LFP visualization method is a promising routine in specific target detection including criminal investigation, customhouse check-in, and drug control.

Synthesis and luminescence properties of Sr2ZnMoO6: Eu2O3 phosphors

The Sr(2-x)ZnMoO6 phosphors doped with Eu2O3 were produced through the sintering process in the electrical furnace at a temperature of 1100 °C for 6 hours in an air atmosphere. The characteristics of the synthesized phosphors, including their photoluminescence properties and lifetime profile analysis, were investigated, along with their structure using X-ray diffraction analysis (XRD) and FTIR analysis. The crystalline structure of the Sr2ZnMoO6 phosphor was confirmed by a Rigaku SmartLab SE X-ray diffractometer (XRD). The phosphors doped with Eu3+ exhibited excitation bands at various wavelengths, including 362, 380, 394, 415, 465, 525, and 531 nm, and emitted light at 613 nm. The 465 nm was used for excitation, and the emission spectra displayed peaks at 590, 613, 652, and 699 nm, as measured by a Cary-Eclipse spectrofluorophotometer. The highest peak was observed at 613 nm, corresponding to 5D0 →7F2 (reddish-orange) transitions of the Eu3+ ion. The fluorescence decay time system (HORIBA Scientific) measured the decay time of the Eu3+ ion from the transition of 5D0 to 7F2 level. The decay time of phosphors was decreased with increasing the concentration of Eu2O3, which had a decay time of 0.453 to 0.340 ms when monitored at λex = 465 nm. The results obtained in photoluminescence properties. The results suggest that obtained photoluminescence properties of Eu2O3 doped Sr2ZnMoO6 phosphors have potential applications in optoelectronics.