Transition Intensity Parameters Research Articles

Tuned quantum cutting efficiency by Li+/Na+ molar content in LixNa1-xGd(MoO4)2:Er3+/Yb3+ phosphors

Quantum cutting materials have garnered significant interest due to their potential applications in enhancing photoelectric conversion efficiency in devices such as solar cells. The host matrices that accommodate rare earth ions play a pivotal role in determining the optical transition properties, which are crucial for quantum cutting. In this study, both Er3+ single-doped and Er3+/Yb3+ co-doped LixNa1-xGd(MoO4)2 (x = 0, 0.01, 0.1, 0.3, 0.5, 0.7, 0.9, 0.99 and 1.0) were synthesized via a high-temperature solid-state reaction to tune the optical transitions properties and enhance quantum cutting efficiency. Optical transition intensity parameters (Judd-Ofelt parameters) of Er3+ were calculated and shown to vary significantly with the Li+/Na+ molar content, demonstrating that these optical properties can be effectively tuned by adjusting the sample composition. The reliability of these calculations was confirmed by comparing the radiative transition rate ratios between two green emissions of Er3 obtained through both theoretical and experimental methods. A two-step energy transfer mechanism was identified as the basis for quantum cutting process, and the relevant energy transfer and nonradiative relaxation rates were determined. Notably, the quantum cutting efficiency reached a peak value of 155.65 % in Li0.5Na0.5Gd(MoO4)2 sample, indicating that successful tuning of the sample's optical transition properties effectively enhanced its quantum cutting efficiency. These findings underscore the viability of tuning the optical properties of rare earth-doped materials to design highly efficient quantum cutting materials.

Continuous tuning of optical transition properties and phonon spectrum in Er3+ doped germano-tellurite glass system

With the development of science and the progress of technology, novel and advanced rare earth ions doped luminescent materials with higher performance are demanded in the both emerging and traditional applications. Understanding the rules for tuning the spectroscopic properties of these materials is crucial for their development. However, achieving precise control over the optical properties of rare earth doped materials using traditional design and synthesis methods, such as altering dopants and their concentrations or modifying the preparative conditions, still remains challenging. This work aims to adjust the optical transition characteristics of Er3+ doped germano-tellurite glasses by changing the glass components. First, the Er3+ doped germano-tellurite glass series were synthesized using a high-temperature melt-quenching method at optimized melting temperatures. The tuning of band gap energy and refractive index of the glasses were revealed, and it was found that both of them can be monotonically and continuously tuned by changing the glass composition. The optical transition intensity parameters of Er3+ in the glasses were calculated in the framework of traditional three-parameterized Judd-Ofelt theory using the absorption spectra, and furthermore the corresponding optical transition parameters including radiative transition rates and intrinsic lifetimes for some interested levels were alsoconfirmed. The results demonstrated that the optical transition parameters could be efficiently modulated by changing the glass composition, indicating that the spectral properties of Er3+ doped germano-tellurite glasses can be tuned for the practical applications. The reliability of the deduced tuning rule was validated by comparing the theoretical and experimental transition rate ratios of 2H11/2 → 4I15/2 to 4S3/2 → 4I15/2. Furthermore, the tuning regulation of the phonon spectra in relation to the glass composition was discovered, showing a concordance between theoretical predictions and experimental results. From the above facts, it can be concluded that the optical transition properties of Er3+ in germano-tellurite glasses can be substantially adjusted by modifying the glass composition. This work provides a new perspective for designing and developing novel luminescent materials to meet specific application needs.

Optical transition tuning of Er3+ in continuous tungsto-molybdate solid solution NaY(MoxW1-xO4)2 phosphors

Nowadays, the application scenarios of rare earth doped luminescent materials tend to be refined and complicated. The optical properties of rare earth doped materials are difficult to precisely control via the traditional design and synthesis methods, namely, changing doping concentration or preparative conditions. The aim of this study is to tune the optical transition properties of Er3+ in tungsto-molybdate NaY(MoxW1-xO4)2 (x = 0, 0.01, 0.1, 0.3, 0.5, 0.7, 0.9, 0.99 and 1.0) phosphors by changing the host matrix. The Er3+ doped continuous tungsto-molybdate solid solution NaY(MoxW1-xO4)2 phosphors were prepared via a solid state reaction technique at optimized calcination temperatures. The refractive indexes of the obtained solid solution samples were confirmed according to different models and compared. Subsequently, the optical transition intensity parameters, radiative transition rates and intrinsic radiative lifetimes of Er3+ in these solid solution phosphors were calculated in the framework of Judd-Ofelt theory. It was confirmed that the optical transition properties of Er3+ can be greatly tuned by the solid solution composition, and the tuning effects for different transitions are different. To validate the reliability of the Judd-Ofelt calculations, the temperature-dependent emission spectra of two green emissions of Er3+ for different solid solution samples were studied. It was found that the radiative transition rate ratios between two green emissions derived from theoretical calculations and experimental measurements are in reasonable agreement, thus proving that the optical transition calculations are reliable and the optical transition properties of Er3+ in the tungsto-molybdates can be tuned in a large range. This work reminds us of a new route for developing novel luminescence materials based on practical demands.

Study of photoluminescence behaviors and Judd-Ofelt analysis of Eu3+ doped double perovskite Ba2GdSbO6 phosphor for highly pure and strong red-light generation

An array of Eu3+ doped Ba2GdSbO6 luminescent materials have been synthesized by the conventional solid-state (high temperature) reaction route. Surface morphology has been studied via Field Emission Scanning Electron Microscopy. The structural and optical behaviors have been studied using X-Ray Diffraction (XRD), FTIR, Raman spectroscopy, Diffuse reflectance spectroscopy, Photoluminescence excitation (PLE), and Photoluminescence emission (PL) spectra. FTIR and Raman's spectra provided the chemical functional group and different vibrational levels within the samples. The calculated optical band gap was 4.40 eV and 4.47eV for pure and optimized samples respectively. Photoluminescence emission curves have been recorded for 245 nm of excitation wavelength and the highest emission peak was focused at 595 nm corresponding to 5D0 → 7F1. Similarly, the Photoluminescence excitation curves were monitored at the emission wavelength of 595 nm and a broad charge transfer band (CTB) was observed from 230 to 285 nm. The emission spectra show the concentration quenching effect beyond the 2 mol% Eu3+ concentration. The corresponding transitions of Eu3+ were further utilized to obtain the Judd-Ofelt (J-O) transition intensity parameters Ωλ (λ = 2, 4) for each sample. Additionally, by studying decay kinetics, the average lifetime of the red emission of the samples has been evaluated, which was 4.622 ms. The photometric study also reveals the CIE coordinates, color purity and CCT values of the proposed phosphor material. Thus, the results obtained from these characterizations, suggest that the prepared sample may behave as a potential candidate in the case of UV-excited red light-emitting phosphor material for light-emitting diodes and field emission devices.

Luminescence and optical properties of sodium germanate glasses doped with Sm3+ ions

Sm3+ doped sodium germanate glasses were synthesized by high temperature melt-quenching technique, suitable glass composition with optimum Sm3+ concentration and good luminescence thermal stability was obtained. The luminescence performance of Sm3+ and its optical transition property in glasses were studied. The optical transition intensity parameters of Sm3+ were calculated according to Judd-Ofelt theory. According to Huang's model and Dexter's model, it was confirmed that the electric dipole-dipole interaction among Sm3+ was responsible for the concentration dependent luminescence quenching of 4G5/2 level of Sm3+. Temperature dependent luminescence characteristics of Sm3+ was also investigated, and the luminescence thermal quenching behavior was found. When the temperature was 423 K, the emission intensity of the sample can still maintain 90% of that at room temperature. The result showed that this kind of red-emitting glass phosphor had an excellent luminescence thermal stability.

Preparation and characterization of multifunctional Li+ co-doped LaOCl: Eu3+ for sensor, phosphor and catalytic applications

In the present work, a sequence of Li+ (0–5 mol %) ions co-doped LaOCl: Eu3+ (7 mol%) samples were synthesized via a solid-state route. The compounds are crystallized in a tetragonal phase with space group P4/nmm (No. 129). The bandgap energy of synthesized phosphor is found in the range of 4.21–4.31 eV. Cyclic voltammetry (CV) and Electrochemical (AC) Impedance spectroscopy by means of carbon paste electrode in 0.1 M KOH electrolyte were carried out. CV curve confirms the prepared electrode sense the mercury and tin in the concentration range 1–5 mM. The consequence of co-doping Li+ ions (3 mol%) upon the luminescence of LaOCl: Eu3+ is investigated and found to be 3.3 times enhancement of emission intensity. Transition probabilities, radiative lifetime, branching ratio, and intensity parameters were estimated from Judd-Ofelt theory. The CIE and CCT values are estimated with the help of emission spectra. The CIE color coordinates (0.625, 0.375) of all the samples stood nearer to viable red phosphor and well matches with Y2O2S:Eu3+ (0.647, 0.343), Y2O3: Eu3+ (0.629, 0.3651) and NTSC (0.67, 0.33) ensuing in Li+ ions co-doped LaOCl : Eu3+, to acts as a favorable material for red phosphor. Upon UV-light irradiation, the samples with 1 to 5 mol% Li+ ions exhibited superior photocatalytic activity of Rh.B and among them, 4 mol% Li+ ions co-doped sample degrade 91.15 % in 60 min. Thereby results reveals the benefit of synthesized samples for electrochemical sensor, solid state display and photocatalytic applications.

Sm<sup>3+</sup> ions doped zinc barium tellurite oxyfluoride glasses for laser materials

The Sm3+ ions were doped tellurite glasses with composition (55-x) TeO2-10ZnF2-35BaO-xSm2O3 (where x = 0.00, 0.05, 0.10, 0.50, 1.00 and 1.50 in mol%) to investigate the physical, the optical, the luminescence and structural properties. The functional groups can be identified using FT-IR spectra of Sm3+ in the glasses. The most intense peak from emission spectra is at 600 nm (4G5/2->6H7/2) corresponding to reddish-orange color. The oscillator strengths were resolved from the absorption spectra and then used to calculate the Judd–Ofelt (J–O) intensity parameters. The radiative properties were calculated by J–O intensity parameters for various transitions in tellurite glass matrices. According to the results of stimulated emission cross section, lifetime and the branching ratio of the emission transition 4G5/2->6H7/2, it is promised that 0.50 mol% of Sm2O3 doped tellurite glasses is the potential laser material.

Effect of [Li]/[Nb] ratios on UV-VIS-NIR spectroscopy and up-conversion luminescence in Hf:Dy:LiNbO3 crystals

A series of Hf:Dy:LiNbO3 crystals with various [Li]/[Nb] ratios ([Li]/[Nb]=0.946, 1.05, 1.20 and 1.38) in the melt were grown by the Czochralski method. The UV-VIS-NIR absorption spectra of Hf:Dy:LiNbO3 crystals were measured, and Judd-Ofelt (J-O) theory is used to evaluate the transition intensity parameters Ω2, 4, 6 and spectroscopic quality factor (X). The X of Hf:Dy:LiNbO3 crystals with the [Li]/[Nb] ratio of 1.38 was found to be 2.11. The up-conversion luminescence at around 475 nm, 582 nm, 653 nm and 749 nm of Dy3+ ions were observed under 800 nm excitation. The energy transfer mechanisms of up-conversion process were analyzed in detail, and luminescence lifetime was measured. The results show that Hf:Dy:LiNbO3 crystal is an excellent candidate for laser medium.

Facile fabrication of thermal stable Eu(HCOO)3 red-emitting crystals with high color purity for near-ultraviolet chip triggered white light-emitting diodes

The thermal stable Eu(HCOO)3 red-emitting crystals were synthesized by a facile hydrothermal route. Both excitation and emission spectra revealed that the prepared crystals can be efficiently pumped by the near-ultraviolet (NUV) light and it can emit brightness red light with admirable color purity of 90.4%. With the help of Judd-Ofelt theory, the optical transition intensity parameters of Eu3+ ions were evaluated so as to explore its local symmetry performance in the Eu(HCOO)3 host lattices. The thermal quenching behaviors of the studied samples were investigated through the temperature-dependent emission spectra. Ultimately, a white light-emitting diode (WLED) lamp with good color rendering index (78.2) and correlated color temperature (6386 K) was packaged through coating the tricolor phosphors (BaMgAl10O7:Eu2+ blue-emitting phosphor, (Ba,Sr)2SiO4:Eu2+ green-emitting phosphor and resultant red-emitting crystals) onto the surface of a NUV chip. These results disclosed the high brightness Eu(HCOO)3 red-emitting crystals were suitable for NUV chip triggered WLED applications.

Enhanced luminescence properties of Eu3+ activated CaGd2(WO4)4 red-emitting phosphors with Mo6+ doping

Novel CaGd2(WO4)4(1−x)(MoO4)4x:Eu3+ red phosphors were successfully prepared through a solid state method. The influence of molybdenum ions doping on the crystal structure and luminescence properties of CaGd2(WO4)4:Eu3+ were characterized in detail. Mo6+ ions are introduced into CaGd2(WO4)4 to induce the structure transformation from monoclinic scheelite with superspace group I2/b to tetragonal scheelite with superspace group I41/a. Under UV light excitation, CaGd2(WO4)4(1−x)(MoO4)4x:Eu3+ phosphors exhibit the strongest red emission dominated by the 5D0 → 7F2 transition of Eu3+ at 617 nm. The luminescent properties of Eu3+ are improved significantly when Mo6+ ions are introduced into the host. In the case of x = 0.1, the emission intensity of CaGd2(WO4)3.6(MoO4)0.4:Eu3+ phosphor is enhanced by 50% compared to undoped one, and the colour purity and quantum yield are calculated to be 95.3% and 53.5%, respectively. Meanwhile, the as-prepared phosphor exhibited unusual temperature sensitive emission, and the thermal quenching process was explained resultantly through the configurational coordinate diagram. Furthermore, to better understand the red emission behavior, the Judd–Oflet theory was employed to analyze the radiative transition intensity parameters of CaGd2(WO4)4 phosphors.

Transition intensity calculation of Yb:YAG**Project supported by the National Natural Science Foundation of China (Grant Nos. 61405206, 51502292, and 51702322), the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant Nos. CXJJ-16M251 and CXJJ-15M055), and the National Key Research and Development Program of China (Grant No. 2016YFB0402101)

The Yb:YAG is an excellent high-average power and ultra-short pulse laser crystal. Transition intensity parameters and Huang–Rhys factors are fitted to its emission spectrum by the full-profile fitting method. Calculated results indicate that the emission spectrum of Yb:YAG at cryogenic temperature consists of three pure electron state transitions and two phonon-assisted transitions, one vibronic transition releases one-phonon of 3 cm−1, and the other vibronic transition absorbs one-phonon of 22 cm−1. At 300 K, the phonon assisted transition of 3 cm−1 turns into two- or more-phonon assisted transitions. The procedure absorbing phonon can reduce the thermal load of Yb:YAG and improve the laser efficiency, which may be one of the reasons why Yb:YAG has excellent performance. The emission bands of Yb:YAG are broadened thermally, and the peak values decrease by several times. The emission cross sections of Yb:YAG determined by Fuchtbauer–Ladenburg (F–L) formula are remarkably different from those calculated with , which indicates that it is necessary for a laser material to determine its transition intensity parameters in order to reasonably evaluate the laser performance.

Luminescence properties and charge transfer mechanism of host sensitized Ba2CaWO6:Eu3+ phosphor

Eu3+ ions activated Ba2CaWO6 phosphors were synthesized by the conventional high temperature solid-state reaction method. The crystalline nature of the prepared phosphor was identified through XRD analysis and Williamson-Hall plot method. The compositional analysis was carried out by means of EDS. The morphology of the obtained samples were characterized by SEM and TEM analyses. Vibrational modes were studied using FTIR and Raman spectroscopy. It was noticed from the photoluminescence spectra that charge transfer band excitation in the host at 314nm is much more prominent than the rare earth excitation wavelength at 393nm to give the dominant 595nm emission in the host matrix by the energy transfer mechanism. The change in emission intensity corresponding to varying concentration of Eu3+ was studied. The fluorescence lifetime of the samples were calculated. Optical transition intensity parameters and various radiative properties were calculated using the Judd-Ofelt theory. Photoluminescence spectra were used to estimate the CIE chromaticity co-ordinates and were observed to be in the orange-red region.

Growth, structure and spectroscopic properties of 1 at.% Er3+: GdTaO4 laser crystal

1at% Er3+ doped Er: GdTaO4 laser crystal with high optical quality was successfully grown by the Czochralski method. The structural parameters were obtained by the X-ray Rietveld refinement. A high crystalline quality of Er: GdTaO4 was determined by the X-ray rocking curve. The transition intensity parameters of Er3+ ions were fitted according to the absorption spectra along three principal polarization directions. The relatively larger emission cross section (1.022×10−20cm2), long fluorescence lifetime ( 5.66ms) and relatively weaker reabsorption phenomenon around 1.6µm indicate that 1at% Er: GdTaO4 crystal can be used as a promising NIR laser material. Meanwhile, the stimulated emission cross-section spectra along three principal polarization directions were investigated for 4I13/2 →4I15/2 transitions at 1.5–1.6µm which indicates a great potential of Er: GdTaO4 for multi-wavelength emission at 1.5–1.6µm. In addition, the possibility of generating green and red lasers in Er: GdTaO4 was also analyzed and evaluated.

Full-profile fitting of emission spectrum to determine transition intensity parameters of Yb3 +:GdTaO4**Project supported by the National Natural Science Foundation of China (Grant Nos. 51172236, 51502292, 51272254, 51102239, 61205173, and 61405206).

The Judd–Ofelt theoretic transition intensity parameters of luminescence of rare-earth ions in solids are important for the quantitative analysis of luminescence. It is very difficult to determine them with emission or absorption spectra for a long time. A “full profile fitting” method to obtain in solids with its emission spectrum is proposed, in which the contribution of a radiative transition to the emission spectrum is expressed as the product of transition probability, line profile function, instrument measurement constant and transition center frequency or wavelength, and the whole experimental emission spectrum is the sum of all transitions. In this way, the emission spectrum is expressed as a function with the independent variables intensity parameters , full width at half maximum (FWHM) of profile functions, instrument measurement constant, wavelength, and the Huang–Rhys factor S if the lattice vibronic peaks in the emission spectrum should be considered. The ratios of the experimental to the calculated energy lifetimes are incorporated into the fitting function to remove the arbitrariness during fitting and other parameters. Employing this method obviates measurement of the absolute emission spectrum intensity. It also eliminates dependence upon the number of emission transition peaks. Every experiment point in emission spectra, which usually have at least hundreds of data points, is the function with variables and other parameters, so it is usually viable to determine and other parameters using a large number of experimental values. We applied this method to determine twenty-five of Yb3+ in GdTaO4. The calculated and experiment energy lifetimes, experimental and calculated emission spectrum are very consistent, indicating that it is viable to obtain the transition intensity parameters of rare-earth ions in solids by a full profile fitting to the ions’ emission spectrum. The calculated emission cross sections of Yb3+:GdTaO4 also indicate that the F–L formula gives larger values in the wavelength range with reabsorption.

Enhanced luminescence from silver nanoparticles integrated Er3+-doped boro-tellurite glasses: Impact of annealing temperature

Considerable enhancement of rare earth ions luminescence intensity stimulated via metal nanoparticles (NPs) inclusion inside inorganic glass matrix opened a new avenue to achieving efficient lasing glass media. Tuning the localised surface plasmon resonance (LSPR) band of noble metal NPs through their precise size manipulation is demonstrated to be the key for such accomplishment. We report the influences of annealing (heat treatment) temperature (AT) on the down-conversion luminescence features of erbium (Er3+) doped zinc-boro-tellurite (ZBT) glasses containing silver NPs. The AT dependent (between 390 and 450 °C) variations in refractive index and density are ascribed to the generation of non-bridging oxygen (NBO) ions. X-ray diffraction pattern confirmed the amorphous nature of the melt-quenched synthesized glass samples. TEM micrograph revealed the nucleation of Ag NPs inside the glass matrix having average diameter between 8.4 (un-annealed sample) to 11.8 nm (annealed). The UV–Vis spectra exhibited seven absorption bands corresponding to 4f–4f transitions of Er3+ ions. Annealed samples displayed a red shift of SPR bands positioned at 550 and 580 nm. Judd–Ofelt theory is used to evaluate the intensity parameters for radiative transitions within 4fn configuration of Er3+ ion. Annealing up to 410 °C is found to stimulate the plasmonic effect through the enlargement of NPs. Consequently, the PL intensity is enhanced by a factor of 3.23 (2H11/2 → 4I15/2), 4.10 (4S3/2 → 4I15/2), and 3.79 (4F9/2 → 4I15/2). This achieved excellent down-conversion luminescence efficiency of proposed glasses shows their potential implementation in photonic devices and solid state lasers.

Effect of [Li]/[Nb] ratios on the absorption and up-conversion emission spectra in In:Yb:Ho:LiNbO3 crystal

In:Yb:Ho:LiNbO3 crystals with high optical quality were grown by the Czochralski method with various ratios of [Li]/[Nb], that is 0.94, 1.05, 1.20 and 1.38 in the melt. The UV–VIS–NIR absorption spectra of In:Yb:Ho:LiNbO3 crystals were measured. The transition intensity parameters Ωt (t=2, 4 and 6), spectroscopic quality factor (X) and the lifetimes of Ho3+ in In:Yb:Ho:LiNbO3 crystals were all evaluated by the Judd–Ofelt theory. The spectroscopic quality factor Ω4/Ω6 of In:Yb:Ho:LiNbO3 crystals with the [Li]/[Nb] ratio of 1.38 was found to be 1.69, which is comparable with those found in widely used Ho3+ doped crystals. Furthermore, up-conversion emission spectra were determined and analyzed under 980nm LD excitation in the In:Yb:Ho:LiNbO3 crystals. The results revealed that In:Yb:Ho:LiNbO3 crystal with the [Li]/[Nb] ratio of 1.38 is a promising material for 2μm wavelength radiation.

Ab-initio calculations of Judd–Ofelt intensity parameters for transitions between crystal-field levels

Wavefunction-based ab-initio calculations of the electric-dipole moments of 4fN–4fN transitions of lanthanide ions are performed to extract the Atpλ intensity parameters. The extraction method is an extension of our earlier calculations of crystal-field (CF) parameters for lanthanide ions in crystals. The CASSCF/RASSI-SO (Complete-Active-Space Self-Consistent-Field/Restricted-Active-Space State-Interaction Spin-Orbit) calculations have been carried out on the chosen model system of CaF2: Ce3+ with an interstitial fluoride ion (Fi−) on z-axis (Ce3+ ion occupying the C4v symmetry site). In consideration of the site symmetry and the coordination situation of Ce3+ ion at C4v site in CaF2 as well as the superposition model (SM), the calculated intensity parameters for Ce3+ ion can be classified into three categories, and detailed discussions are then given.

Crystal growth and characterization of Ho-doped Lu3Ga5O12 for 2 μm laser

Ho:LuGG single crystal was successfully grown by the Czochralski growth method, and its lattice parameter was found to be 12.2371 Å. Its thermal conductivity was measured to be 5.29 W mK−1 at 300 K. Meanwhile, transmission spectra were recorded at room temperature, and then its absorption spectra were obtained combining with the transmission spectra of LuGG crystal. The transition intensity parameters Ωt (t = 2, 4, 6), the oscillator strengths, fluorescence branching ratios, transition probabilities and the lifetimes of Ho3+ in LuGG crystal were all evaluated by the Judd–Ofelt theory. Furthermore, its emission spectra were also determined and analyzed.

Effect of RO (R=Ca, Sr, Ba, Zn or Pb) component on spectroscopic properties of Eu3+ in RO-B2O3 glasses

Eu3+-doped binary borate glasses with different metal oxide components RO (R=Ca, Sr, Ba, Zn or Pb) were prepared by melt-quenching technique. The fluorescent spectral properties of Eu3+ in these glasses were experimentally studied. The analysis on the phonon sidebands (PSBs) indicated that RO component did not cause obvious change of the electron-phonon coupling constant (EPC). By inspecting the optical absorption edges it was found that RO could greatly affect the band gap energy, and the glass with PbO component revealed the smallest band gap energy, the glasses with ZnO, BaO and SrO showed similar band gap energy. The optical transition intensity parameters of Eu3+ in all studied glasses were calculated, it was found that for each sample its value of Ω2 was larger than that of Ω4 and Ω6, and the sample with PbO component exhibited the smallest Ω2, but the Ωλ values for ZBE, CBE, BBE and SBE were very similar. These results might be helpful for the design of borate glasses.

Electrospinning preparation and optical transition properties of Eu(DBM) 3Phen/PS fluorescent composite fibers

Eu(DBM) 3Phen/PS (DBM = dibenzoylmethide; Phen = 1,10-phenanthroline; PS = polystyrene), a novel fluorescent fiber, was synthesized through electrospinning technology. In order to analyze the fluorescent fiber Eu(DBM) 3phen/PS, Scanning Electron Microscope (SEM), fluorescence spectra and fluorescence decay curve were measured. The optical transition intensity parameters Ω λ ( λ = 2, 4 and 6) were calculated according to the transition intensities of 5D 0 → 7F J (J = 2, 4 and 6). The radiative transition properties of 5D 0 level including transition rates, fluorescence branching ratios and radiative transition lifetime were also calculated. The evaluation of the results suggested that the novel fluorescent fiber Eu(DBM) 3Phen/PS may be a potential efficient luminescent material.