7F2 Transition Research Articles

SYNTHESIS AND PHOTOLUMINESCENCE PROPERTIES OF ELLIPSOIDAL La2O2SO4:Eu3+ PHOSPHORS

This research was focused on the homogeneous precipitation synthesis of a series of Eu3+ ion-activated ellipsoidal La2O2SO4 phosphors based on the La2(SO4)3-CO(NH2)2 reaction system. The structural identification, thermal analysis, morphology and luminescence properties of the as-prepared products were characterized with Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetry and differential scanning calorimetry (TG/DSC), field emission scanning electron microscopy (FESEM) and photoluminescence (PL) spectra. Pure La2O2SO4 ellipsoidal particles with a long radius of about 2 µm and a short radius of about 1 µm were successfully prepared by calcining a rhombus-like precursor at 800 °C for 2 h in air. The formation mechanism of the precursor and its corresponding calcination product were also proposed. Photoluminescence results revealed that the strongest red emission peak was centered at 619 nm upon 249-nm ultraviolet (UV) light excitation in La2O2SO4:x%Eu3+ (x = 3, 6, 9, 12 and 15) phosphors. The exchange interaction was responsible for the concentration quenching mechanism of the 5D0→7F2 transition of Eu3+ ions in the La2O2SO4 host lattice. The optimal x value was 15 and the corresponding decay process showed a single exponential decay behavior whose lifetime t and color correlation temperature (CCT) were calculated to be 2.112 ms and 2752 K, respectively.

X-ray-Induced Scintillation Properties of Nd-Doped Bi4Si3O12 Crystals in Visible and Near-Infrared Regions.

Undoped, 0.5, 1.0, and 2.0% Nd-doped Bi4Si3O12 (BSO) crystals were synthesized by the floating zone method. Regarding photoluminescence (PL) properties, all samples had emission peaks due to the 6p-6s transitions of Bi3+ ions. In addition, the Nd-doped samples had emission peaks due to the 4f-4f transitions of Nd3+ ions as well. The PL quantum yield of the 0.5, 1.0, and 2.0% Nd-doped samples in the near-infrared range were 67.9, 73.0, and 56.6%, respectively. Regarding X-ray-induced scintillation properties, all samples showed emission properties similar to PL. Afterglow levels at 20 ms after X-ray irradiation of the undoped, 0.5, 1.0, and 2.0% Nd-doped samples were 192.3, 205.9, 228.2, and 315.4 ppm, respectively. Dose rate response functions had good linearity from 0.006 to 60 Gy/h for the 1.0% Nd-doped BSO sample and from 0.03 to 60 Gy/h for the other samples.

Influence of Air Annealing on Optical and Scintillation Properties of YAG:Pr,Ca

Single crystals of yttrium aluminum garnet (YAG) with Pr3+ and Ca2+ ions grown by the vertical Bridgman method are submitted to air anneal. The influence of this process on optical absorption, photo‐, and radioluminescence is investigated in a set of samples with different concentrations of Pr and Ca. Absorption induced by the heat treatment in the 300–600 nm range in YAG:Pr,Ca is discussed, in comparison with that in YAG:Ca crystals. Photo‐ and radioluminescence spectra in as‐grown and air‐annealed samples recorded at room temperature are discussed. The features of emission decrease at 5d–4f and 4f–4f transitions of Pr3+ ions after heat treatment are considered.

Radiation resistance of praseodymium-doped aluminum lithium fluorophosphate scintillator glasses for laser fusion experiments

We report the gamma (γ)-ray radiation resistance of praseodymium (Pr3+)-doped aluminum lithium fluorophosphate scintillator glasses. For its assessment as a scintillator material for laser fusion experiments, a 20Al(PO3)3-80LiF-PrF3 (Pr3+-doped APLF) glass was irradiated with γ-rays from a cobalt-60 (60Co) source resulting in an absorbed dose of 5.2 kGy. Although γ-ray-irradiation results in increased absorption due to phosphorus-oxygen hole centers (POHCs) and PO3 2− electron centers (PO3 ECs), these radiation-induced defects do not modify the glass emission as both non-irradiated and γ-ray-irradiated glasses exhibit similar emission spectra and decay times under optical and X-ray excitation. The emission peaks observed also correspond to the different interconfigurational 4f5d → 4f2 and intraconfigurational 4f2 transitions of Pr3+ ions which are neither oxidized nor reduced by irradiation. Our results show that Pr3+-doped APLF glass still maintains its characteristic fast decay time and that γ-ray irradiation does not affect the glass scintillation mechanisms.

Optimization and Validation of Europium-Sensitized Fluorescence Method for Determination of Tetracycline Antibiotics in Water from Fish Farms

Sensitized europium fluorescence was used for simple, fast and efficient determination of tetracycline residues in water from fish farms. Tetracycline antibiotics: oxytetracycline (OTC), tetracycline (TC) and chlortetracycline (CTC) were extracted from water samples using polymeric hydrophilic–lipophilic balanced cartridges. After evaporation and pre-concentration, tetracyclines form a complex with europium and citric acid as coligand at pH 8.5. The complex formed has a wide absorption spectrum at 388 nm and a narrow emission maximum at 619 nm resulting from the 5D0 - 7F2 transition within the europium ion. The complex is stable with intensive fluorescence and linear in the concentration range of 5-2500 µg/L for tetracycline and oxytetracycline and 5-1000 µg/L for chlortetracycline. The detection limit was 0.68 µg/L for OTC, 1.29 µg/L for TC and 0.65 µg/L for CTC, respectively.The proposed method is very sensitive and particularly applicable to samples where low concentrations of tetracycline antibiotics are expected.

Phosphor conversion for WLEDs: YBO3: Ce3+, Tb3+ and its effects on the luminous intensity and chromatic properties of dual-layer WLED model

Abstract Yttrium borate phosphor co-doping Ce3+, Tb3+ ions (YBO3: Ce3+, Tb3+) is fabricated using solid state reaction, and then its luminescence is investigated through the computational energy transfer process. Under excited near-UV light, this YBO3: Ce3+, Tb3+ phosphor exhibits strong absorption with broad and sharp emission bands due to the 4f – 5d and 5d – 4f transitions of Ce3+ ions and the 4f – 4f transition of Tb3+ ions, respectively. The phosphor's emission chromaticity could be tunable by adjusting the concentration of doping ions. With 15% Tb3+ and 3% Ce3+ in the composition, the phosphor can gain maximum 76.7% external quantum efficacy. The phosphor is proposed for utilization in the phosphor package of white light-emitting diodes (WLEDs) to enhance their lighting performances. The findings point out that by modifying YBO3: Ce3+, Tb3+ concentration (5% – 10%), improvements in luminous intensities, color consistency, and color rendering indices can be observed. The higher concentration (10%) of YBO3: Ce3+, Tb3+ is more advantageous to the luminous flux and chromatic uniformity in cases of 4000 K and 5000 K WLEDs, while lower (5%) concentration greatly benefits those properties in the case of 3000 K WLED. Regardless of CCTs, the WLEDs show a reduction in chromatic reproduction efficiency with the increasing concentration of YBO3: Ce3+, Tb3+. Hence, this green phosphor could be a good material for high-luminescence WLED, yet the modification of phosphor concentration is advisable if the simultaneous good chromaticity is desired.

Influence of europium doping on the crystallization, morphology, and the cathodoluminescent properties of PbNb2O6:Eu3+ phosphors

Undoped PbNb2O6 and Eu3+ ion doped PbNb2O6 samples were synthesized by high temperature mixed oxide method, applying a heat treatment temperature of 1250°C and an annealing time of 6 hours. In order to elucidate the structural and optical behavior of PbNb2O6:Eu3+ phosphors, XRD (X-ray diffraction), SEM (scanning electron microscopy), EDS (energy dispersive spectroscopy), CL (cathodoluminescence) and absoption analyses were performed. The X-ray diffraction results showed that the undoped PbNb2O6 sample crystallized in a rhombohedral symmetry while Eu3+ doped samples formed in orthorhombic symmetry. The morphologies of the rhombohedral and orthorhombic grains were examined by SEM-EDS. The CL spectra showed spectral profiles between 580 and 780 nm in relation to the 4f–4f transitions of Eu3+. A strong emission was observed at about 620 nm, corresponding to the red color and associated with the 5D0 → 7F2 transition of Eu3+, while the undoped sample did not exhibit CL emission of the host which is probably due to the presence of lead in the host structure. In addition, the CL analysis results showed that the emission intensity increased with the increase of Eu3+ ion concentration. The increase in magnetic dipole transition caused by the electron beam radiation effect of the CL with increasing doping concentration is associated with the change of dipole moments of the Eu3+ doped tungsten bronze host and thus differentiating the emission spectrum. UV lamp excited photograph of undoped sample showed blue-violet color while Eu3+ doped phosphors with red color became more significant with increasing Eu3+ concentration.

Preparation of Eu(III) Complexes Containing Maleopimaric Acid Anhydride with Ultra-narrow and Efficient Fluorescence Emission for High Determination on Gallic Acid in Acetonitrile Solution.

Two novel Eu(III) complexes constructed by maleopimaric acid anhydride (MPA) and 2,2'-bipyridyl (Bpy) / 1, 10-phenanthroline (Phen), named as MPA-Bpy-Eu / MPA-Phen-Eu, have been synthesized by a one-step precipitation method. FTIR, UV, TG, elemental analysis, XPS, and ESI-MS revealed the successful coordination of Eu(III) ions with MPA and Bpy / Phen through Eu-O and Eu-N bonds, respectively. Introducing MPA into coordinate structure increased the electron cloud density in 3d5/2 orbit of Eu(III) ions, enhanced the absolute quantum yields of MPA-Bpy-Eu (89.27%) and MPA-Phen-Eu (94.41%), and decreased the full width at half maxima of 5D0 → 7F2 transitions of MPA-Bpy-Eu (2.23nm) and MPA-Phen-Eu (2.93nm), respectively. The fluorescence quenching experiments showed that there was a good linear relationship between the relative fluorescence intensity of MPA-Bpy-Eu and gallic acid (GA) concentration in acetonitrile solution in the range of 0 to 8.41 × 10-2mM. The results of UV-vis spectra, the fluorescence lifetimes, and the quantum yields demonstrated that the dynamic quenching model played a major role in the quenching process of GA on MPA-Bpy-Eu. The quenching process of GA on MPA-Phen-Eu involved dual fluorescence quenching mechanistic pathways, including static and dynamic models.

Photoluminescence and dosimetric properties of Tb-doped Na3AlF6 ceramics

Tb-doped Na3AlF6 ceramics with different concentrations were synthesized by the spark plasma sintering (SPS) method, and photoluminescence (PL), optically-stimulated luminescence (OSL), and thermally-stimulated luminescence (TSL) properties were investigated. In the PL property, Tb-doped Na3AlF6 ceramics showed emission peaks at 420, 440, 460, 480, 550, 580, and 620 nm and the decay time constants due to 4f–4f transitions of Tb3+. Under the stimulation at 750 nm, Tb-doped Na3AlF6 ceramics showed OSL peaks due to 4f–4f transitions of Tb3+. The TSL glow peaks were detected at 120, 200, and 280 °C in Tb-doped Na3AlF6 ceramics. The 0.1 and 1% Tb-doped Na3AlF6 ceramics had linear dose response over the dose range of 0.01–1000 mGy.

Development of Nd-Doped CaWO4 Single Crystalline Scintillators Emitting Near-Infrared Light

Nd-doped CaWO4 single crystals with dopant concentrations of 0.1, 0.5, and 1% were synthesized by the floating zone method. The transmission, photoluminescence, and scintillation properties were evaluated from ultraviolet to near-infrared (NIR) ranges. An emission peak due to transitions of the host was observed at 400 nm, and several sharp peaks originating from Nd3+ 4f–4f transitions were confirmed at 900, 1060, and 1300 nm. The quantum yields of 0.1, 0.5, and 1% Nd-doped samples were 70.7, 79.5, and 61.2%, respectively, when monitored, and excited wavelengths were 750–1500 nm and 590 nm. Decay times consistent with typical Nd3+ transitions were obtained when NIR ranges were monitored. Additionally, the energy transfer between the host and Nd3+ occurred according to the decay measurement. The relationship between X-ray irradiated dose rate and intensity in the range of NIR was investigated by combining the crystals with an InGaAs-photodiode. The lowest detectable dose rate retaining the linearity of the present crystals was 0.3–0.06 Gy/h.

Neutron detection properties of thermoluminescent Sr2B2O5:Eu ceramics

Thermoluminescent (TL) ceramic materials have been developed for neutron detection on the basis of Eu-doped Sr2B2O5. A photoluminescence emission band at around 360 nm was observed for Sr2B2O5 doped with Eu at 0.1–0.3 mol% with respect to Sr, and is attributed to 5d–4f transition of Eu2+. The emission band was also observed in the TL spectra. TL glow peaks were observed at 340, 400, and 500 K in the TL glow curves after X-ray irradiation, and Sr2B2O5 doped with Eu at 0.2 mol% exhibited the highest TL intensity. After neutron irradiation, a significant difference in the TL intensities was observed between the ceramics containing enriched 10B and 11B owing to the contribution of 10B(n,α)7Li reaction to the observed TL. The difference in the TL intensities linearly increased with neutron fluence of, at least, 107–1011 neutrons cm−2. Hence, we succeeded in the development of TL materials for neutron detection.

Polymer and biopolymer organic-inorganic composites containing mixed oxides for application in energy up- and down-conversion

Organic-inorganic composites are interesting for many commercial applications— the chemical and thermal stability of inorganic oxides combined with the processability and flexibility of organic compounds and polymers provides these composites with attractive mechanical, optical, and thermal properties. In general, the desired properties cannot be found in one single constituent, but adequate association of the components affords composites with complementary properties. In this study, we have synthesized and characterized organic-inorganic composites based on the natural polymers Gellan Gum and Karaya Gum containing luminophores consisting of niobium and gadolinium mixed oxides doped with Eu3+ or Yb3+/Er3+. In this paper luminophores were prepared by a modified non-hydrolytic sol-gel route, and was obtained the organic-inorganic composites by the casting technique. The investigated how the luminophore concentration, 1.0 or 3.0% m/m of gum, affected the luminescent properties of the composites. For all the composites doped with Eu3+, the down-shifting luminescence results revealed an intense emission band at 612 nm, due to the 5D0 → 7F2 transition of Eu3+, as well as an emission band between 300 and 500 nm, attributed to polymer emission, which shifted the chromaticity coordinates toward the blue region. As for the composites doped with Yb3+/Er3+, they displayed bands at 1005 and 1535 nm, ascribed to the 2F5/2 → 2F7/2 and 4I13/2 → 4I15/2 transitions of Yb3+ and Er3+, respectively. The up-conversion luminescence results evidenced emission bands in the visible region, at 520, 550, and 655 nm, assigned to the 2H11/2 → 4I15/2, 4S3/2 → 4I15/2, and 4F9/2 → 4I15/2 transitions of Er3+, respectively, indicating that two photons were absorbed.

Optical and computational analysis of red light emitting Eu(III) complexes for applications in luminescent devices

Eight co-ordinated Eu(III) complexes of type [Eu (L3). X] were synthesized for applications in organic light emitting devices. The complexes are reported in solid state, where L is 6-methyl-chromone-3-aldehyde and X represent 2H2O(C1), 1,10-phenanthroline (C2), neocuproine (C3), biquinoline (C4), bathophenanthroline (C5), 5,6-Dimethyl-1,10-phenanthroline (C6). The prepared Eu complexes were characterized by elemental analysis, FT-IR and 13C, 1H NMR, photoluminescence (PL) and thermo-gravimetric analysis/differential thermal gravimetric analysis (TGA/DTA) studies. The photoluminescence emission spectra of solid and solution phase showed five characteristic peaks arising from 5D0→7FJ (J = 0–4) transitions of europium ion obtained at excitation of λex = 370 nm (solid state) and λex = 385 nm (solution). The highest intensity of peak at 615 nm in solid form whereas at 612 nm in solution, indicated strong emission because of 5D0→7F2 transition. This peak is sharp and responsible for superior red color purity. The optical band gap, refractive index and energy transfer mechanism were also obtained for all complexes. Luminescence decay time (τ), radiative and non-radiative transition rate, luminescence efficiency and Judd-Ofelt intensity parameters were analyzed by PL spectroscopy. The CIE color coordinates value and branching ratio values were determined for all synthesized complexes in both solid and solution form. The outcomes revealed that synthesized complexes are magnificent emitters with wide applications in electroluminescent materials, display devices and laser materials.

White luminescence and energy transfer studies in Tb3+-Eu3+ co-doped phosphate glasses

Europium and Terbium co-doped phosphate glasses with a chemical composition of 80NaH2PO4–18Na2CO3–2Al2O3, which have been named PNA, were well produced with melt-quenching technique. We studied the structural and optical properties of the material. According to the XRD pattern, all the samples have an amorphous structure. After adding Tb3+, it was revealed that the photoluminescence (PL) intensity of the 5D0 →7F2 transition increased. It was observed that the Tb3+ ion functions as a sensitizer for the Eu3+ ion, and significantly enhances the spectroscopic features of Eu-doped PNA. We demonstrated the possibility of excitation transfer from Tb3+ to Eu3+. The radiative lifetime (τR) calculated from Judd-Ofelt (J-O) theory, and the, empirically discovered, measured lifetimes (τmes) were compared for Eu-doped PNA and (Eu; Tb) co-doped PNA. The results reveal that the quantum efficiency (η) was found to increase after adding Tb3+ from 87 to 94% for the 5D0 →7F2 transition. The energy transfer was identified and explained both experimentally using the excitation and emission spectra and theoretically using the J-O theory. The results of the CIE chromaticity coordinates of (Eu, Tb) co-doped PNA were found in the white region, which suggests a significant promise in field emission displays.

Optical, scintillation, and dosimetric properties of undoped and Tb-doped CaYAlO4 single crystals

Optical, scintillation, and dosimetric properties of the undoped and Tb-doped CaYAlO4 single crystals grown by the floating zone method were evaluated. Several photoluminescence (PL) emission peaks due to the 4f–4f transitions of Tb3+ ion were observed at 385–620 nm under excitation at 250 nm in Tb-doped CaYAlO4 samples. Under X-ray irradiation, scintillation peaks of the Tb-doped CaYAlO4 crystals were consistent with the PL emission peaks. In terms of a dosimetric property, the 0.1% Tb-doped crystal exhibited the highest thermally stimulated luminescence intensity and the widest linear responses in the range of 0.01–1000 mGy among the samples.

Effect of TBP on the Coordination Process of Eu(III) with T2EHDGA: A Luminescence Spectroscopy Investigation

AbstractIn this report, we explore the precise responsibility of a phase modifier along with the prime ligand in the coordination process of Ln(III) ions using luminescence spectroscopic technique by taking Eu(III) as the probeing metal ion. A well accepted diglyoclamide (DGA) ligand: N,N,N’,N’‐ tetra(ethylhexyl)diglycolamide(T2EHDGA) was used as the prime extractant along with tri‐n‐butylphosphate (TBP) as the phase modifier. Meticulous investigations on Eu(III) complexation with T2EHDGA‐TBP binary mixture was pursued by employing luminescence spectroscopy with the systematic variation of the concentration of TBP in the ligating phase and initial concentration of Eu(III) in the feed phase. The dominancy of the LMCT band over that of the metal centered band signifies the structural difference in the ligands used in the study. The presence of TBP in the organic phase enhances the intensity of 5D0→7F2 and 5D0→7F0 transition. The excitation and emission patterns of the Eu(III)‐solvate species formed in the organic phase both in unirraditaed and irradiated conditions were found to be entirely different, which effectively corroborates the efficacy of the extracting phase. The asymmetry ratio (AR) and the life time data at each experimental conditions were ascertained to realize the coordination behavior of the Eu(III) complex in the organic phase.

Study of Eu3+–Gd3+ co-doped Ba–Bi–B glasses for red-laser applications: Physical, structural, photoluminescence and time-resolved spectral characteristics

A series of Eu3+ and Eu3+/Gd3+ co-doped barium-bismuth-borate (Ba–Bi–B) glasses were prepared by melt-quench technique. And deliberated the physical, structural, and spectroscopic properties of all glasses and explored the energy transfer process from Gd3+ to Eu3+ ions. The density of glasses increased with increasing of Gd3+ concentration in co-doped glasses. Characteristics of steady-state and time-resolved photoluminescence (PL) of Eu-doped and Eu3+-Gd3+ co-doped glasses under different excitation wavelengths suggested the prospects of the investigated glass system for display device applications. PL spectrum displays a strong red emission peak centered at 612 nm due to the Eu3+: 5D0→ 7F2 transition. Less intense emissions centered at 577 nm (7F0), 590 nm (7F1), 651 nm (7F3) and 700 nm (7F4) are also observed from the radiative transitions of the excited state 5D0 of Eu3+ions. The values of radiative parameters such as transition probability, branching ratios, and stimulated emission cross-sections were obtained from Judd–Ofelt theory analysis and indicated the aptness of the Ba–Bi–B glasses for optical devices. A 5-fold enhancement in the PL intensity was observed in 1.0 mol% Eu3+ and 3.0 mol% Gd3+ co-doped glass under λExci. = 394 nm excitation. The calculated commission Internationale de l'eclairage color coordinates and correlated color temperature values show that the Ba–Bi–B glasses are useful for red-laser and display device applications.

Photophysical, optical and lasing analysis of fluorinated β-keto carboxylate europium(III) complexes

Six luminescent, bright red Eu(III) complexes with a β-keto-carboxylic acid as prime ligand and N-donor aromatic systems as auxillary ligand were synthesised via ecologically efficient grinding method. The distinctive red peak (5D0 → 7F2) of Eu(III) ion is exhibited in emission spectra of all complexes. The luminescent properties of complexes were analysed through decay time, color coordinates, luminescence efficiency and Judd Ofelt parameters. The value of Ω2 is found to be higher than Ω4 which indicated hypersensitive nature of 5D0 → 7F2 transition. The results established the complexes as a strong contender for red light emitting display devices. The fluorescence branching ratios, stimulated emission cross section, gain band width and optical gain showed the good lasing strength of 5D0 → 7F2 transition of complexes. The complexes exhibited decent thermal stability and have optical energy band gap value in semiconductor range, thus can have relevance in optoelectronic devices. Energy transfer mechanism was investigated for complexes which affirmed the efficacious transfer of energy from ligands to Eu(III) ion. The synthesised complexes were also assayed for antimicrobial and antioxidant properties. All complexes are reported to show better antioxidant behaviour than the prime ligand and also exhibited upstanding antibacterial activities.

Photoluminescence properties of Eu3+-doped Na2CaSiO4 phosphor prepared by wet-chemical synthesis route

The present investigation focuses on the development of Eu3+ activated phosphors for near ultraviolet (NUV) excited light emitting diode (LED) applications. In this investigation, we have synthesized a series of Na2CaSiO4:Eu3+phosphors via wet-chemical method and characteristic of synthesized phosphors have been analyzed by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Thermo gravimetric analysis– Differential thermal analysis (TGA–DTA) and photoluminescence (PL) techniques. The recorded excitation band indicates a broad excitation band centered at 262 nm due to charge transfer (CT) band and sharp peaks at 395 nm and 466 nm due to 7F0→5L6 and 7F0→5D2 transition of Eu3+ ions. The highest excitation intensity was observed at 396 nm wavelength. Therefore under 396 nm excitation, the emission spectrum showed characteristics peaks located at 595 nm and 615 nm, which are attributed due to the 5D0→7F1 and 5D0→7F2 transition of Eu3+ ions. Emission spectra shows dominant emission peak at orange region around 595 nm due to the magnetic dipole transition of5D0→7F1. In addition, the effects of the Eu3+ ions on the emission intensity were investigated, it was found that the emission intensity increases as the concentration of Eu3+ ions increases up to 0.5 mol%. Thereafter, PL emission intensity was decreased due to concentration quenching. The CIE Chromaticity coordinate of the prepared phosphor was located in the orange region around (0.584, 0.421) with high color purity. As per the investigation of prepared Na2CaSiO4:Eu3+phosphors, it was concluded that it is a promising candidate for lighting and display applications.

Photoluminescence properties of tunable full-color-emitting CaZrO3: Ln (Ln = Tb3+, Eu3+, Tb3+/Eu3+) phosphors for white LEDs

A series of single-phase color-turning CaZrO3: Ln (Ln = Tb3+, Eu3+, Tb3+/Eu3+) phosphors was synthesized through citric acid-fueled combustion method. The as-prepared samples had the perovskite structure with Pnma space group and elements uniformly distributed in nanosized particles. CaZrO3: Eu3+ phosphor produced red luminescence due to the 5D0→7F2 transition at 619 nm CaZrO3: Tb3+ phosphor produced green and blue luminescence due to the 5D4→7F6, 5 transition at 487 nm and 548 nm. Under UV irradiation at 254 nm, the CaZrO3: Ln (Ln = Tb3+, Eu3+, Tb3+/Eu3+) phosphors achieved tunable full-color emission in a wide range from blue to green, warm white, and red. The corresponding CIE coordinates were (0.2546, 0.2413), (0.3196, 0.5085), (0.3603, 0.3896) and (0.6089, 0.3844). The energy transfer from ZrO32− to Tb3+ and then to Eu3+ was determined by the dipole-dipole mechanism in CaZrO3: 0.03 Tb3+, xEu3+ phosphors. The excellent temperature stability of CaZrO3: 0.03 Tb3+, 0.01Eu3+ phosphor (ΔE = 0.2659 eV) indicates that CaZrO3: Ln (Ln = Tb3+, Eu3+, Tb3+/Eu3+) phosphors have broad application prospects in W-LED devices.