WLED Applications Research Articles

High color purity and color tunability in Sm3+/ Eu3+ activated/ co-activated Sr6Ca4(PO4)6F2 phosphor for WLED and display devices application

Fluoride based phosphors are proving their worth in the field of luminescence especially in display devices and WLED application. In the present investigation a series of Sm3+, Eu3+ activated/ co-activated Sr6Ca4(PO4)F2 phosphors has been prepared by simple combustion method using citric acid as a fuel. Crystalline nature of the sample is confirmed by XRD characterization technique. Morphological and elemental analysis of prepared phosphor has been done by scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) analysis. Vibrational features of prepared phosphor have been confirmed by fourier transform infrared spectroscopy (FTIR) analysis. Moreover, photoluminescence properties of prepared phosphor shows the sample showing color tunability from orange to red with co-doping of Sm3+/Eu3+ ions. Color purity of prepared phosphor is observed 99.15%. These all results confirms the Sm3+, Eu3+ activated/ co-activated Sr6Ca4(PO4)6F2 phosphors are the potential candidate for the WLED and display devices applications.

Structural and optical studies on Dy3+ doped Gd2Ti2O7 pyrochlore as white light emission

A series of Dy3+ trivalent ion embedded into the GTO pyrochlore (Gd2-xDyxTi2O7 (x = 0.5, 1.0, 1.5, 2.0, and 2.5 mol%)) have been synthesized through standard solid state reaction technique. The single phasic nature with Fd3m space group was determined through XRD, Raman spectroscopy, and photoluminescence spectroscopy. Rietveld refinement analysis results confirm that the substitution is not going to disturb the crystallographic structure as well unit cell dimensions. From Raman deconvoluted spectrums, it was found that all the vibrational bands show a very small blue shifting on Dy3+ substitution. The photoluminescent EM-spectra for all the samples were examined under the excitation wavelength 347 nm gives two high intense emission bands centered around 484 nm (blue) and 581 nm (yellow) due to the 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 transitions respectively, and less intense band appeared at wavelength of 456 nm arising due to the 4I13/2 → 6H13/2 transition of Dy3+ ions. For the optimum Dy3+ concentration (2.0 mol%), the Y/B ratio is found to be 0.8753 which is close to unity hence combination of both yellow and blue emission bands emits white light as validated by CIE chromaticity coordinates calculated values are (x = 0.34959, y = 0.35381). Therefore, the results reveal that Dy3+ substituted GTO pyrochlore samples could be used as luminescent material for wLEDs application.

Synthesis, modulation, and characterization of Ln3+ ions doped metal−organic frameworks for WLED applications

Isostructural lanthanide metal−organic frameworks (MOFs) are synthesized by the spontaneous self-assembly of lanthanide ions (Ln = La3+, Tb3+ and Eu3+) with H3cpioa (5-(4-carboxy-lphenoxy)-isophthalic) ligands. Based on the detailed study on the structural properties, it's found that different Ln ions have identical coordination environment in Ln(cpioa) MOF. By adjustment of the molar ratio of Ln ions, the chromaticity of Ln(cpioa) MOF can be easily modulated. La0.9Tb0.093Eu0.007(cpioa) (CIE coordinate: (0.319, 0.331)) shows a white emission very close to pure white-light (0.333, 0.333) with a high quantum yields of 54.74%. Furthermore, corresponding white LED devices were fabricated, which indicates Ln(cpioa) MOF might be a promising candidate phosphor for the WLED applications.

Novel and Wide-Ranging Color Tuning Photoluminescent Properties of Zn2+/Sm3+ Co-Doped Tetragonal Scheelite-Type SrWO4 Nanophosphors: Energy Transfer and Realization of White Emission for w-LEDs Application

Novel and Wide-Ranging Color Tuning Photoluminescent Properties of Zn2+/Sm3+ Co-Doped Tetragonal Scheelite-Type SrWO4 Nanophosphors: Energy Transfer and Realization of White Emission for w-LEDs Application

Investigating the effect of alkali metals on the structural & optoelectronic properties of hexafluorozirconate red phosphors A2ZrF6 (A = Cs, K, Na) using first-principles calculations: A prospect for warm-white LEDs (w-LEDs) applications

To meet the energy challenges of the near future, the development of environment-friendly and energy-efficient phosphors for luminescence devices like light-emitting diodes (LEDs) is the main quest of researchers nowadays. In this connection, traditional lighting devices like halogen lamps, fluorescent lamps, backlights of liquid crystal displays (LCDs), and incandescent lamps can be replaced by state-of-the-art next-generation lighting technology developed using phosphor-converted white LEDs. Hereby, we have presented a systematic study on the structural and optoelectronic properties of Zr-based phosphors A2ZrF6 (A ​= ​Cs, K, Na) for potential photoluminescence and photovoltaic applications like LEDs. The GGA and GGA ​+ ​U schemes are used for exchange and correlation energy potentials treatment to provide a comparative study on the density functional theory (DFT) based first-principles calculations. The GGA ​+ ​U approach improves bandgap values, confirming the well-known flaw of GGA-based DFT methods in underestimating band gaps in strongly correlated systems. Indirect bandgaps are found with the values 2.05, 6.415, and 7.648 ​eV for Cs2ZrF6, K2ZrF6, and Na2ZrF6, respectively. The ε2(ω) spectra show that Cs2ZrF6 absorbs the maximum number of incident photons in the visible region, whereas K2ZrF6 and Na2ZrF6 absorb the maximum of the incident photons in the near UV region. From the R(ω) spectra, we can note that A2ZrF6 (A ​= ​Cs, K, Na) are the weak reflector of incident photons in the visible and IR regions. In contrast, up to 40% of the incident photons are reflected on higher energies (above 12.0 ​eV).

New Dy3+-activated KCa2Nb3O10 yellow-emitting phosphors for w-LEDs application: Preparation and optical properties

A novel single-phase KCa 2 Nb 3 O 10 :Dy 3+ yellow-emitting phosphor can be efficiently excited under 388 nm irradiation. • KCa 2 Nb 3 O 10 :Dy 3+ phosphors have been firstly synthesized using the molten-salt method. • The KCa 2 Nb 3 O 10 :Dy 3+ product shows excellent thermal stability with high temperature quenching temperature. • The KCa 2 Nb 3 O 10 :Dy 3+ product shows rich UV excitation band and yellow light emission. • The CIE color coordinates of prepared KCa 2 Nb 3 O 10 :Dy 3+ phosphors change slightly. A series of Dy 3+ doped KCa 2 Nb 3 O 10 niobate phosphors that generated yellow emission was prepared using the molten-salt method. The crystal structure, X-ray diffraction (XRD), optimal concentration, photoluminescence excitation/emission (PLE/PL), and luminescent stability of the prepared phosphors were exhaustively studied. The KCa 2 Nb 3 O 10 lattice has a perovskite-like structure, which possesses the Cmcm (No.63) space group. The KCa 2 Nb 3 O 10 :Dy 3+ phosphors can be efficiently excited by n -ultraviolet ( n -UV) excitation of 388 nm. Besides, KCa 2 Nb 3 O 10 :Dy 3+ phosphors can emit three dominant peaks centered at 486, 577, and 662 nm, which are ascribed to the 6 H J /2 ( J = 15/2, 13/2, and 11/2) transitions, respectively. The optimum doping concentrations of Dy 3+ ions in the KCa 2 Nb 3 O 10 host are determined to be 0.02 mol. The thermal-quenching temperature ( T 0.5 ) for the KCa 2 Nb 3 O 10 :0.20Dy 3+ sample is estimated to be above 500 K, and the calculated activation energy ( E a ) is 0.29 eV. Furthermore, the Commission International de I'Eclairage (CIE) color coordinates of prepared KCa 2 Nb 3 O 10 :Dy 3+ phosphors change slightly. KCa 2 Nb 3 O 10 :Dy 3+ phosphors possess good color purity, color stability, and low correlated color temperature (CCT). All results indicate that the KCa 2 Nb 3 O 10 :Dy 3+ phosphors are suitable for white light-emitting diodes (w-LEDs) applications.

Red light component tuning by n-UV/blue light excitations in Sm3+/Eu3+ co-doped Y2O3–Al2O3–Bi2O3–B2O3–SiO2 glasses for W-LED applications

A series of single (Sm3+, Eu3+) and co-doped (Sm3+- Eu3+) Yttrium alumino bismuth borosilicate (YABiBS) glasses have been prepared by basic melting quench method and the emission properties of synthesized glasses were investigated. To analyze the optical and energy transfer mechanism of these glasses the characterizations viz, absorption and luminescence are done. The absorption spectral data is used to observe the electronic band structure by direct and indirect optical band gaps. Bonding Parameters (β‾,δ) were evaluated to explain the ionic (or) covalent nature of the metal-ligand bonds in the present glass network. Near ultraviolet (n-UV) and blue excitations such as 392 nm, 400 nm, 457 nm, and 488 nm are used to record the emissions of single (Sm3+) and co-doped (Sm3+-Eu3+) glasses to achieve the tuneable emissions. Sm3+ ions show the reddish-orange emission mainly through 4G5/2 → 6H7/2 (597 nm) and Eu3+ ions show the intense red emission of transition 5D0 → 7F2 (612 nm). For the Sm3+-Eu3+ glasses by using different excitations, we will achieve the emission changes from orange to reddish-orange and then to red. Decay curves were analysed to know the process of interaction involved in the energy transfer among co-doped RE3+ ions. CIE coordinates and CCT values for all the prepared glasses by various excitations were calculated.

Blue-light-excited red emission in a CaO:Eu phosphor

Introducing multiple luminescent centers into the matrix crystal is an effective measure to endow this class of materials with new optical properties. Here, the coexistence of Eu2+ and Eu3+ was achieved in CaO matrix crystal from CaCO3:Eu3+ by a double crucible carbon reduction method. Under NUV-light excitation, the PL spectrum of CaO:Eu consists both a broad band of Eu2+ and several sharp lines of Eu3+. More significantly, CaO:Eu exhibits broadband emission at λmax = 661 nm upon excitation at 466 nm. Calcium vacancies (VCa) in CaCO3:Eu3+ increase the reduction rate, thereby enhancing the emission intensity of Eu2+. The high Ra (91.2) and LE (49.36 lm/w), and low CCT (3435 K) of as-fabricated WLEDs suggest that the prepared CaO:Eu are promising materials for WLEDs applications. The findings provide a new avenue for exploring novel Eu2+-activated simple oxide-based red phosphors.

Thermally stable red luminescence from Eu3+ -activated telluro zinc phosphate glass under near-ultraviolet light excitation for photonic applications.

Telluro zinc phosphate (TZP) glasses doped with different concentrations of Eu3+ ions were prepared and their physical, structural, and luminescence properties were studied in detail to reveal the utility of the as-prepared glass for white light-emitting diode (w-LED) applications. The broad hump in the diffraction pattern specified the amorphous behaviour of the TZP glass. The various vibrational shoulder linkages were characterized using the Fourier transform infrared (FT-IR) spectroscopy. The optical absorption spectrum was measured in the ultraviolet (UV)-visible (Vis) light region for the Eu3+ -doped TZP (TZPE) glass and the optical band gap was found to be 3.12 eV. Eu3+ -doped TZP glasses showed several emission peaks in the visible region including an intense red emission peak due to the 5 D0 →7 F2 transition under an excitation wavelength of λex = 393 nm, which was matched with the emitting wavelength of the near-UV LED chip. Commission Internationale de I'Eclairage (CIE)chromaticity coordinates were situated in the red region and nearly matched with the coordinates of the commercial red phosphor (Y2 O3 S:Eu3+ ). The decay profile of the TZPE50 glass exhibited a single exponential fit with a decay time ( of 1.76 ms. Temperature-dependent photoluminescence (TDPL) studies demonstratethat the as-prepared glass consist of excellent thermal stability. The detailed analysis and results confirmed that the red-emitting TZPE glasses were potential candidates for white-LED and other photonic applications.

Analysis of thermal chromaticity stability, energy transfer and colour tunablity of Dy3+-Eu3+ doped BBZL glasses for high-power W-LED applications

A family of highly thermal chromatic stable Dy3+-Eu3+ doped B2O3-Bi2O3-ZnO-Li2O (BBZL) glass samples was synthesised using the high-temperature melt quenching technique. The optical and thermal stability properties of the samples were analysed using their fluorescence spectra at various temperatures, fluorescence lifetime decay times and colour coordinates. The Dy3+-doped BBZL (BBZL: Dy) glass samples generated cold white light when exposed to ultraviolet (UV) light, while the Dy3+-Eu3+-doped BBZL (BBZL: DyEu) glass samples emitted neutral and warm white light, which can be attributed to the introduction of Eu3+ that substantially enhanced the colour rendering of samples. An overlap of the excitation-emission spectra of Eu3+ and Dy3+ indicated an energy transfer between Dy3+ and Eu3+. Under a 350 nm excitation, the fluorescence lifetime of BBZL: DyEu decreased from 0.5348 to 0.3642 ms. Using the Dexter theory, the energy transfer between Dy3+ and Eu3+ was demonstrated to be an electric dipole-electric dipole leap. The chromaticity shifts of BBZL: DyEu were 8.60 × 10−4 and 9.40 × 10−4 at 448 and 498 K, respectively, reflecting the high thermal stability of the sample chromaticity. The study demonstrated that Dy3+-Eu3+ doped borate glasses can be used as tunable luminescent materials in high-power white light-emitting diodes to mitigate the chromaticity shift in fluorescent materials at high temperatures.

Spectroscopic investigation on the photoluminescent traits of Dy3+ activated multicomponent borosilicate glasses for W-LED applications

The spectroscopic exploration of Dy3+ activated multicomponent borosilicate (DBS) glasses have been performed via optical absorption, fluorescence measurements, CIE colorimetry analysis and CCT values to investigate their role in the advancement of lighting sector. Oscillator strength values evaluated from the absorbance spectrum were utilized to determine phenomenological Judd-Ofelt (JO) parameters through least square fitting procedure. The fluorescence spectra of DBS glasses under the irradiation of 348 nm epitomize three emission bands which fall in yellow, blue and red region. Various radiative characteristics of the synthesised glass were evaluated by using JO intensity parameters. The color characteristics of DBS glasses were also investigated and the estimated features recommend synthesised glasses for diverse lighting applications.

Perovskite A-site symmetry tuning to achieve high quantum efficiency phosphor for WLED applications

In addition to being a typical red light emitting center, Eu3+ can also be used to study the evolution of lattice symmetry due to its unique electric dipole leap (5D0-7F2) sensitivity to the lattice environment. Here, we synthesized a series of Ba1-xSrxLa0.9LiWO6: 0.10Eu3+ (x = 0.0–1.0) phosphors and used the leap properties to establish a link between the evolution of the lattice environment and the luminescence properties. The introduction of Sr2+ does not affect the lattice type avoiding the effect of phase transition on the luminescence intensity. The lattice symmetry reaches a minimum at Sr2+ concentration of 0.8, which corresponds exactly to the peak of the luminescence intensity. It demonstrated the feasibility of adjusting the occupancy symmetry of Eu3+ to achieve luminescence enhancement. The covalent effect on the luminescence properties in this system is weak compared to the environmental changes by analyzing the attraction of the cations to O2− in the luminescence center neighbors. At the optimal doping concentration, Ba0.2Sr0.8La0.6LiWO6: 0.40Eu3+ phosphor has excellent internal quantum efficiency 95.3%, good color purity 94.79%, and extremely standard color coordinates (0.667, 0.332). In addition, it still has 80.6% emission intensity at 200°C compared to room temperature, which means it has good thermal stability. The good comprehensive performance has laid an important foundation for its application in WLED.

Optical and spectroscopic studies of Dy3+ ions doped Alumino tungsten borate glasses for w-LEDs applications

Alumino tungsten borate (AlWB) glasses doped with dysprosium ions are prepared by melt-quenching method and characterized using spectroscopic techniques such as optical absorption, photoluminescence (PL), and decay spectral studies to comprehend the importance in photonic devices, visible solid state lasers, and other applications. The amorphous nature of the as-prepared glasses were confirmed by XRD studies. The oscillator strengths are measured by using absorption spectra are intern used to evaluate the Judd-Ofelt (Ω2, Ω4, and Ω6) parameters. The PL spectra of the as-prepared glasses manifested three significant emission bands at 483 nm (blue), 575 nm (yellow) and 664 nm (red), and their corresponding electronic transitions are identified from 4F9/2 to 6H15/2,6H13/2 and 6H11/2 respectively. Various radiative parameters such as branch ratio (βR), transition probability (AR), radiative lifetime (τR), effective bandwidth (Δλp), and stimulated emission cross-section (σse) have been calculated. The CIE Chromaticity coordinates evaluated from the emission spectra of Dy-doped AlWB glasses reveal white light emission. Quantum efficiency values are evaluated by correlating the radiative lifetime with the experimental lifetime values measured from the PL decay spectral features. The data acquired from the as-prepared glasses allows us to contemplate that, the titled glasses are suitable to fabricate photonic devices. such as white LED’s and lasers.

Spectroscopic investigation of novel yellow-emitting Li3Bi3Te2O12:Dy3+ phosphors with high thermal stability for w-LEDs applications

Spectroscopic investigation of novel yellow-emitting Li3Bi3Te2O12:Dy3+ phosphors with high thermal stability for w-LEDs applications

Combustion-assisted Ca8.25 Na1.5 Al6 O18 :Sm3+ phosphors for solid-state lighting and WLED applications.

Aluminate-based phosphors have been the most investigated luminescent phosphors over decades due to their outstanding optical properties. In the proposed work, a series of Sm3+ -doped Ca8.25 Na1.5 Al6 O18 (CNAO) phosphor sample was prepared using a simple combustion technique with the help of two fuels i.e., urea-glycine. The purity of phase and structural analysis of the CNAO phosphors were confirmed using X-ray diffraction analysis. Vibrational features of this phosphors confirmed were via Fourier transform infrared analysis. A photoluminescence study of this phosphor showed a doublet emission at 568 and 576 nm in the yellow region attributable to the 4 G5/2 →6 H5/2 transition of Sm3+ ions, whereas a doublet peak noticed in red region ranged from 600 to 620 nm and was attributable to the 4 G5/2 →6 H7/2 transition of Sm3+ ions. Moreover, Commission Internationale de l'éclairage colour coordinates were also located in the yellowish-red region and confirmed the potential of this phosphor as a yellowish-red component for white light-emitting diodes and display devices applications.

Novel YBO3 Phosphors Doped with Ln3+ (Ce3+, Tb3+, Eu3+) Ions with Tunable Color for WLED Applications

In this work, YBO3 phosphors doped with Ln3+ (Ce3+, Tb3+, Eu3+) ions were synthesized by a facile hydrothermal method using high temperature and high pressure environment. Structural property characterizations show all the samples have a similar spherical morphology and a hexagonal crystal structure with good crystallinity. PL spectra and CIE calculation show that the color of phosphors can be easily controlled by the species and atomic content of Ln3+ ions. White color is achieved as the atomic contents of Ln3+ ions are: 1% Ce3+, 3% Tb3+, and 0.5% Eu3+, respectively. Furthermore, LED devices based on ultraviolet chip were fabricated and characterized, and the results clearly demonstrated the tunable color of as-prepared phosphors. At the same time, co-doping Ce3+, Tb3+, and Eu3+ ions can well adjust the fluorescence lifetime of the three rare earth ions through energy transfer. These results show that the phosphor has broad application prospects in the field of display lighting such as LED.

Structural, morphological and optoelectronic aspects of YAlO3:Dy3+ doped nanocrystalline materials for NUV energized WLEDs

Cost-effective urea assisted solution combustion (SC) synthetic method was employed to prepare a series of doped YAlO3:xDy3+ (0.01–0.08 mol) phosphors. The resulting powdered samples were comprehensively examined through various structural as well as optical measurements. Rietveld refinement studies concluded that prepared nanomaterials structured into the orthorhombic system having Pbnm (62) space group. Energy dispersive spectral (EDS) analysis was executed to observe the relative proportions of constituent elements in all doped nanophosphors. Transmission electron microscopy (TEM) micrograph indicated the presence of agglomerated particles with the average size in the nano range. Photoluminescence excitation (PLE) spectra showed that the designated phosphors could be excited by near ultraviolet (NUV) energized lighting sources. The strongest emission centred at 576 nm, corresponding to electric dipole (4F9/2 → 6H13/2) transition of Dy(III) ion. Furthermore, characteristics photometric parameters viz. correlated color temperature (CCT), chromaticity coordinates (x and y), and color purity (%) were figure out with the aid of PL data, which strongly endorsed their usage in NUV energized WLEDs applications.

A novel Ba2SrWO6:Mn4+/Dy3+ red phosphors for warm WLED applications

A novel non-rare-earth red-emitting phosphor of Ba2SrWO6:Mn4+ with a double-perovskite structure was synthesized via a solid-state reaction method at high temperatures, and the mechanism of structural formation was systematically investigated. Moreover, Dy3+co-dopant ions were exploited to develop a white-light phosphor of Ba2SrWO6:Mn4+/Dy3+. Excitation spectra of Ba2SrWO6:Mn4+ and Ba2SrWO6:Mn4+/Dy3+ were both in a wavelength range of 250–550 nm. Under 325 nm excitation, the Ba2SrWO6:Mn4+ phosphors showed a red emission with a peak at 693 nm because of the 2E → 4A2 transition of Mn4+ ions. The Mn4+ ion concentration in the Ba2SrWO6:Mn4+ phosphors was optimized at 0.6 mol%, and the corresponding CIE (Commission International de I’Edairage) chromaticity coordinate was determined at about (0.7238, 0.2762), locating in the deep-red-light region. Meanwhile, the white-light Ba2SrWO6:Mn4+/Dy3+ phosphors displayed a wide emission band, including a blue emission at 492 nm (attributed to 4F9/2 → 6H15/2), a yellow emission at 582 nm (owing to 4F9/2 → 6H13/2), and the red emission at 693 nm. By varying the Dy3+ ion concentration, the emission color of the co-doped phosphors can be tuned from white light (0.3365, 0.3493) to warm white-light (0.4263, 0.3778), qualifying the phosphorous materials as a potential candidate for white-light- or warm white-light-emitting diode applications.

Synthesis and characterization of highly Eu3+-doped CaY2Sb2(ZnO4)3 red phosphors with abnormal thermal quenching performance for w-LEDs application

In the present work, a series of zincate CaY2Sb2(ZnO4)3:Eu3+ phosphors were successfully obtained via the conventional solid-state method at high temperature. The phase purity, morphology, element mapping, photoluminescence excitation/emission (PLE/PL), and decay time of the obtained phosphors were investigated systematically. Results show that the synthesized samples demonstrate the strongest red-emitting peak at 610 nm under the n-ultraviolet (n-UV) 395 nm excitation. The Judd-Ofelt parameters (Ω2, Ω4), radiative transition rates, and branching ratios (β0J,J = 2, 4) of CaY2Sb2(ZnO4)3:Eu3+ to explore the Eu3+-coordinated environment in the host matrix. The concentration quenching of CaY2Sb2(ZnO4)3:2xEu3+ phosphors happened until at high doping concentration of x = 50 mol%. CaY2Sb2(ZnO4)3:100 mol%Eu3+ sample presented the excellent thermal stability with abnormal thermal quenching behavior. Compared with the commercial Y2O3:Eu3+ red phosphor, the luminescent intensity of the prepared phosphor is 1.14 times stronger. The high internal quantum efficiency (IQE) of CaY2Sb2(ZnO4)3:100 mol%Eu3+ phosphor is 79.20%. In addition, the fabricated red and white light-emitting diodes (w-LEDs) both emit bright light. The w-LED demonstrates a high color rendering index (Ra = 96) and a low correlated color temperature (CCT = 5249 K). Therefore, the prepared red-emitting phosphor has a promising application in w-LEDs.

Experimental and theoretical studies of red emission enhancing mechanism in Al-doped CaMoO4:Eu phosphor

In this work, a complete picture of the relationship between the structural and optical properties of Al-doped CaMoO4:Eu phosphor was investigated empirically and theoretically. A series of Al-doped CaMoO4:Eu phosphors were synthesized by solid-state reaction. X-ray diffraction analysis and Rietveld refinement confirmed the formation of a single-phase tetragonal CaMoO4. Under the excitation wavelength of 395 nm, the phosphors exhibited typical red emission bands of Eu3+ as a function of Al3+ doping contents and reached a maximum value at 0.1 mol % Al3+. In addition, the CaMoO4:0.05Eu, 0.1Al phosphor showed chromaticity coordinates (0.6406, 0.3370), which is close to the pure red color as standardized by the National Television System Committee. Significantly, the red emission intensity of Al-doped CaMoO4: 0.05Eu phosphor was 5-times higher than that of the undoped one. This enhancement was explained by Judd-Ofelt (JO) analysis, from which intensity parameters (Ωλ, λ = 2, 4) and radiative properties including branching ratios (βr), transition probability (A), radiative lifetime (τcal), and stimulated emission cross-section (σe) of the phosphor were derived. Judd-Ofelt analysis confirmed that Al3+ promotes the covalent character in the Eu–O bond and the asymmetry in the CaMoO4 crystalline structure. The CaMoO4: 0.05Eu, 0.1Al phosphor generates strong red emission and possesses high values of branching ratio (81.80%), emission cross-section (102.3×10−22 cm2) and quantum efficiency (48.44%) and is potential for low-cost WLED applications.