Spectral Overlap Method Research Articles

Enhanced 2 μm emission behavior and energy transfer in Ho3+/Yb3+ co-doped bismuth-tellurite fiber-core glasses by CeO2

Ho3+/Yb3+ co-doped and Ho3+/Yb3+/Ce3+ tri-doped 85TeO2–5Bi2O3–10ZnO glasses were synthesized by the melt-quenching method. The structural and spectral properties were investigated comprehensively according to Raman, absorption, and fluorescence spectra. By evaluating the energy transfer process, the 2 μm emission behavior has been enhanced effectively with the introduction of a glass network modifier (CeO2), which can be ascribed to the population of Ho3+: 5I7 accelerated by cross-relaxation (CR) between Ho3+ and Ce3+. A large emission cross-section (1.11 × 10−20 cm2) and gain coefficient (2.12 cm−1) have been obtained of Ho3+ at around 2 μm band in TBZHYC2 glass, where a significant advancement has been achieved compared with the glass fiber core without CeO2. Moreover, the energy transfer mechanisms between Ho3+/Yb3+ and Ho3+/Ce3+ were quantitatively analyzed based on a spectral overlap method. As mentioned above, Ho3+/Yb3+/Ce3+ tri-doped bismuth-tellurite glasses are potentially competitive and applicable in the field of 2 μm band infrared fiber lasers as a kind of novel laser glass.

Effect of phonon energy on 2 μm emission in Tm3+/Yb3+ co-doped bismuth-tellurite glasses based on WO3 or B2O3 adjustment

Tm3+/Yb3+ co-doped TeO2–Bi2O3–ZnO glass has been synthesized by using the melt-quenching method in this paper. According to Gaussian fitting and J-O theory, the impact of phonon energy on both structure and fluorescence properties has been investigated by introducing different phonon energy oxides. It was shown that various glass network units were observed in Raman spectra. Moreover, the Te–O–Te can be destroyed via the addition of WO3 and B2O3, resulting in [TeO4] transformed to [TeO3] and [TeO3+δ] groups, while thermal stability and fluorescence properties were enhanced. And the phonon energy (ħω0) increased from 758 to 926 (WO3) and 1097 cm−1 (B2O3). Meanwhile, the intensities of the absorption and fluorescence spectra were improved significantly by the change of glass network units. The effective fluorescent bandwidth (Δλeff) was raised from 223 to 227 and 231 nm, and the gain coefficient was from 1.60 cm−1 to 1.71 cm−1 and 1.72 cm−1. Finally, the micro-parameters for energy transfer processes have been calculated by using a spectral overlap method. Results indicate that the energy transfer process between Tm3+ and Yb3+ was more efficient with the high phonon energy oxide introduction (WO3 and B2O3), which provides practical significance that will be beneficial for obtaining the 2 μm high gain material.

Enhanced 3 μm luminescence in Ho3+/Yb3+ co-doped bismuth-tellurite glass by controlled structure network topology

Ho3+/Yb3+ co-doped bismuth-tellurite glasses (TeO2-Bi2O3-ZnO) have been investigated systematically according to the Raman, absorption, and mid-infrared luminescence spectra, contraposing 3 μm band. The evolution of luminescence and structure has been explored by modifying network topology based on the substitution of TeO2 with WO3 when the optimal concentration ratio of Ho3+/Yb3+ was determined in TBZ glass. The results show that WO3 entered the glass structure network as [WO4] and [WO6] units, contributing to the content of bridging oxygen and network connectivity increased, which can be enhanced effectively the luminescence properties. The gain cross-section is 1.51 × 10−20 cm2 (2884 nm) increasing by 11.85% compared with the glass without glass network modifiers. Moreover, the energy transfer micro-parameters have been calculated based on a spectral overlap method. The CD-A was augmented from 0.36 to 1.11 × 10−40 cm6/s. As mentioned above, the bismuth-tellurite glasses have the potential as the gain materials for mid-infrared fiber lasers.

Structure, and luminescence properties in Tm3+/Yb3+ co-doped bismuth-tellurite glass for 2 μm fiber lasers

Tm3+/Yb3+ co-doped TeO2-Bi2O3-B2O3-BaF2 glasses were synthesized by the melt-quenching method. The Raman and FT-IR spectra were deconvoluted by the Gaussian decomposition method to determine the molecule vibration glass network. And the luminescence properties at 2 μm were systematically analyzed under 980 nm laser diodes (LD) pumped according to J-O theory. Furthermore, the spectroscopic parameters, absorption, emission cross-sections, and gain coefficient of Tm3+ in TBBB3 were calculated by absorbance and fluorescence spectra. Eventually, the energy transfer process was quantitatively characterized by using a spectral overlap method. The maximum emission cross-section of Tm3+ is 9.79 × 10−21 cm2 (at 1857 nm) when the doped concentration ratio of Tm3+/Yb3+ is 0.5: 2 (mol%). Meanwhile, the backward energy transfer coefficient (CA-D) is much smaller than the forward (CD-A), and the energy transfer rate WET is 1691.5 × 10−20 cm3/s. All these results indicate that the glass presented is an ideal laser gain material at 2 μm.

∼2 μm fluorescence and energy transfer characteristics in a highly Tm3+-doped bismuthate glass based on Al2O3 adjustment

In this paper, the glass network of a newly developed bismuthate glass was adjusted and analyzed by changing the Al2O3 content, thus effectively increasing the doping concentration of Tm3+. The fundamental physical and thermal properties including density, molar volume, refractive indices, and characteristic temperatures were systematically investigated, suggesting the B2O3/Al2O3 anomaly ratio of the prepared host glass is 35%/10%. Various glass network units were found in the host glasses, so that the flexibility of the glasses was enhanced, which is favorable for highly and homogeneously doping of Tm3+ ions. A highly Tm3+-doped bismuthate glass with a concentration of 20.5 × 1020 ions/cm3 was prepared without quenching. Radiative parameters of the presented glass were determined from absorbance spectra. Moreover, relatively large emission cross-section (5.29 × 10−21 cm2) and gain coefficient (10.87 cm-1) were achieved in the prepared highly Tm3+-doped bismuthate glass. Finally, the microparameters for energy transfer processes were calculated by a spectral overlap method. Results show that the presented highly Tm3+-doped bismuthate glass has ideal potential for high gain fibers in ∼2 µm band.

2.0 μm Ultra Broadband Emission from Tm3+/Ho3+ Co-Doped Gallium Tellurite Glasses for Broadband Light Sources and Tunable Fiber Lasers

A flat 2.0 μm ultra broadband emission with a full width at half maximum (FWHM) of 329 nm is achieved in 1 mol.% Tm2O3 and 0.05 mol.% Ho2O3 co-doped gallium tellurite glasses upon the excitation of an 808 nm laser diode. The influence of Tm3+ and Ho3+ contents on 2.0 μm spectroscopic properties of gallium tellurite glasses is minutely investigated by absorption spectra, emission spectra, and lifetime measurement. In addition, emission cross section and gain coefficient of Ho3+ ions at 2.0 μm are calculated, and the maximum values reach 8.2 × 10−21 cm2 and 1.54 cm−1, respectively. Moreover, forward and backward energy transfer probability between Tm3+ and Ho3+ ions are qualitatively evaluated by the extended spectral overlap method. Large ratio of the forward energy transfer from Tm3+ to Ho3+ to the backward one (19.7) and high forward energy transfer coefficient (6.22 × 1039 cm6/s) are responsible for effective 2.0 μm emission from Ho3+ ions. These results manifest that Tm3+/Ho3+ co-doped gallium tellurite glass is suitable for potential applications of broadband light sources and tunable fiber lasers operating in eye-safe 2.0 µm spectral region.

Ce3+/Eu2+ Doped Al2O3 Coatings Formed by Plasma Electrolytic Oxidation of Aluminum: Photoluminescence Enhancement by Ce3+→Eu2+ Energy Transfer

Plasma electrolytic oxidation (PEO) of aluminum in electrolytes containing CeO2 and Eu2O3 powders in various concentrations was used for creating Al2O3 coatings doped with Ce3+ and Eu2+ ions. Phase and chemical composition, surface morphology, photoluminescence (PL) properties and energy transfer from Ce3+ to Eu2+ were investigated. When excited by middle ultraviolet radiation, Al2O3:Ce3+/Eu2+ coatings exhibited intense and broad emission PL bands in the ultraviolet/visible spectral range, attributed to the characteristic electric dipole 4f05d1→4f1 transition of Ce3+ (centered at about 345 nm) and 4f65d1→4f7 transition of Eu2+ (centered at about 405 and 500 nm). Due to the overlap between the PL emission of Al2O3:Ce3+ and the PL excitation of Al2O3:Eu2+, energy transfer from Ce3+ sensitizer to the Eu2+ activator occurs. The energy transfer is identified as an electric dipole–dipole interaction. The critical distance between Eu2+ and Ce3+ ions in Al2O3 was estimated to be 8.6 Å by the spectral overlap method.

Luminescence properties, energy transfer and thermal stability of blue-green color tunable Sr3Y(BO3)3:Ce3+, Tb3+ phosphors

In this paper, a class of blue-green tunable Sr3Y(BO3)3:Ce3+, Tb3+ phosphors were synthesized by the high-temperature solid phase reaction. Their XRD patterns, luminescence properties, energy transfer mechanisms, fluorescence lifetime, luminescence quantum efficiency, and thermally stable properties were researched in detail. At the excitation wavelength of 338 nm, Sr3Y(BO3)3:xCe3+ phosphors appeared intense blue light and the critical quenching concentration was x = 0.07. The studied phosphors could tune from blue to green by changing the Ce3+/Tb3+ ratio. From analyzing the luminescence spectra and fluorescence lifetime of the Sr3Y(BO3)3:Ce3+, Tb3+ phosphors, the energy transfer mechanism in the phosphors was the dipole-dipole. According to the calculation, the effective energy transfer reached to 86.5% when doped 0.5 mol Tb3+ and the critical distance was to 13.718 Å by spectral overlap method. Moreover, Sr2.93Y0.85(BO3)3:0.07Ce3+, 0.15Tb3+ phosphors were less sensitive to the thermal effect and the emission intensity at 373 K is 70% of that at room temperature. All results indicated that the Sr3Y(BO3)3:Ce3+, Tb3+ phosphors were one of the most essential candidates in phosphor-converted white LEDs.

Luminescence properties and energy transfer investigations of Ce3+ and Tb3+ co-doped NaCaGaSi2O7 phosphors

The NaCaGaSi2O7:Ce3+、NaCaGaSi2O7:Tb3+ and NaCaGaSi2O7:Ce3+/Tb3+ phosphors were synthesized under a weak reducing atmosphere by the traditional high temperature solid state reaction method. The synthesized phosphors were characterized by X-ray diffraction (XRD), fluorescent decay times, photoluminescence (PL) emission and excitation spectra including temperature-dependent PL properties. The effects of Ce3+ singly doped and Ce3+/Tb3+ co-doped concentrations on the structure, luminescence properties and energy transfer of NaCaGaSi2O7 phosphors were studied in detail. The results indicated that the energy transfers between Ce3+ and Tb3+ in the host occurred mainly via a dipole-dipole mechanism, and the critical distances of the ion pairs (Rc) were calculated by the quenching concentration method and spectral overlap method. The Ce3+ emission intensity and decay lifetimes decrease with the raise of Tb3+ concentration in NaCaGaSi2O7:Ce3+/Tb3+ samples. The above results indicate that NaCaGaSi2O7:Ce3+/Tb3+ can be a candidate as a host material for solid-state lighting and display fields.

Blue-Green-Yellow Color-Tunable Luminescence of Ce3+-, Tb3+-, and Mn2+-Codoped Sr3YNa(PO4)3F via Efficient Energy Transfer.

Tunable blue-green-yellow emitting Sr3YNa(PO4)3F (SYNPF):Ce3+,Tb3+,Mn2+ phosphors have been prepared via a high-temperature solid-state reaction method. The structural and luminescent properties, energy transfer (ET) mechanism, and thermal quenching of the samples are investigated in detail. The ET from Ce3+ to Tb3+ and Mn2+ in SYNPF is identified as the interaction of the electric dipole-quadrupole with ET efficiencies of 81.6% and 69.3%, respectively. The critical distances for Ce3+/Tb3+ and Ce3+/Mn2+ are calculated through the spectral overlap method to be 9.54 and 10.92 Å. Under UV excitation, high-efficiency tunable blue-green-yellow emissions from Ce3+ to Tb3+ and Mn2+ can be obtained. Moreover, white light can also be achieved by adjusting the stoichiometry of Ce3+ and Mn2+ properly in the SYNPF phosphor. In addition, the temperature-dependent luminescence spectra exhibit good thermal quenching behaviors for the as-prepared phosphors. The above results suggest that SYNPF:Ce3+,Tb3+,Mn2+ phosphors can act as color-tunable emission phosphors for potential applications in WLEDs.

Luminescence properties and energy transfer investigations of Ce3+ singly doped and Ce3+/Tb3+ codoped Na3LuSi2O7 phosphors

The Na3LuSi2O7:Ce3+ and Na3LuSi2O7:Ce3+, Tb3+ phosphors were synthesized under a weak reducing atmosphere by the traditional high temperature solid state reaction method. The synthesized phosphors were characterized by X-ray diffraction (XRD), Photoluminescence (PL) emission and excitation spectra. The effects of Ce3+ singly doped and Ce3+/Tb3+ codoped concentrations on the structure, luminescence properties and energy transfer of Na3LuSi2O7 phosphors were studied in detail. The results indicated that the energy transfers between Ce3+ and Tb3+ in the host occurred mainly via a dipole-quadrupole mechanism, and the critical distances of the ion pairs (Rc) were calculated by the quenching concentration method and spectral overlap method. Based on the good PL properties adjusting the doping concentration of the activators (Ce3+,Tb3+) might be promising as a host material for solid-state lighting and display fields.

Tunable full-color emitting Na2Ba6(Si2O7)(SiO4)2:Ce3+,Eu2+,Tb3+,Mn2+ phosphor for UV white LEDs: Photoluminescence and energy transfer

Tunable full-color emitting Na2Ba6(Si2O7) (SiO4)2:Ce3+,Eu2+,Tb3+,Mn2+ phosphors have been prepared and investigated. X-ray diffraction (XRD), photoluminescence (PL) spectra, absolute quantum yield and lifetimes were used to characterize the samples. When doped with Ce3+ or Eu2+ they present blue luminescence under UV excitation. Results of luminescence spectra and decay time measurements reveals that an energy transfer (ET) from Ce3+ to Tb3+ occurred mainly via a dipole–quadrupole mechanism, and the critical distances of the ion pairs (RC) were calculated by the spectral overlap method. The energy-transfer efficiencies of Ce3+ to Eu2+ are discussed in detail. Commission on illumination value of color tumble emission as well as luminescence quantum yield (9.8–42.1%) can be tuned by controlling the content of Ce3+, Tb3+ and Eu2+. A white LED with CIE chromaticity coordinates of (0.30, 0.41), superior color-rendering index (Ra) of 87.5 and correlated color temperature (CCT) of 6518 K was fabricated by combining a 365 nm UV-InGaN chip and a phosphor blend of white-emitting Na2Ba6(Si2O7) (SiO4)2:Ce3+,Eu2+,Tb3+,Mn2+ phosphor. All results suggest that it is suitable for UV white LEDs.

Solvent directed morphologies and enhanced luminescent properties of BaWO4:Tm3+,Dy3+ for white light emitting diodes

A series of Tm3+ and Dy3+ codoped BaWO4 phosphors with tunable shapes were controllably synthesized by a facile solvothermal method. The effects of ratio of ethylene glycol (EG) and water on the morphologies of BaWO4 structures are systematically studied. It was discovered that the reason for these morphological changes is based on the reaction speed of the kinetic control, which relates to the strong chelating abilities of ethylene glycol. And when the solvent is pure ethylene glycol, the peanut-like BaWO4:Dy3+ has the strongest emission intensity. Moreover, the emission color of the phosphors varied from blue (0.232, 0.180) to white (0.268, 0.250) by controlling Dy3+ ions content with a fixed Tm3+ concentration. The energy transfer mechanism was investigated in detail. With increasing the doped concentration of Dy3+ ions, the energy transfer efficiency of BaWO4:0.005Tm3+,yDy3+ increased gradually and reached as high as 63% when the Dy3+ doped concentration is 0.03. The critical distance RC calculated by the spectral overlap method is about 19.93 Å, and it is in good agreement with that obtained using the concentration quenching method (19.70 Å), indicating that the electric dipole-dipole interaction is the main energy transfer mechanism for BaWO4:Tm3+,Dy3+ phosphors.

Structure and color-tunable luminescence properties of Ce3+ and Tb3+-activated Mg2La8(SiO4)6O2 phosphors based on energy transfer behavior

A series of novel luminescent emission-tunable phosphors Mg2La8(SiO4)6O2:Ce3+,Tb3+ (MLS:Ce3+,Tb3+) have been prepared by a solid-state reaction. The phase formation was firstly confirmed through X-ray diffraction technique and refined by the Rietveld method. The MLS:Ce3+,Tb3+ phosphors, which crystallized in apatite-type hexagonal phase, exhibited a broad excitation band ranging from 200 to 400nm and several emission bands centered at 426nm and 551nm. Energy transfer from Ce3+ to Tb3+ ions via a dipole-dipole mechanism occurred in the as-synthesized phosphors upon ultraviolet (UV) excitation. The energy transfer efficiency increases with increasing doping content of Tb3+ ions, which was confirmed by the luminescence spectra and fluorescence decay curves of corresponding ions simultaneously. The energy transfer critical distance was calculated and evaluated by both the concentration quenching and spectral overlap methods. The chromaticity of emission-tunable phosphors was also characterized by the Commission International de l'éclairage (CIE) chromaticity indexes, and the color tone can be tuned from blue (0.179, 0.122) to green (0.267, 0.408) by controlling the ratio of Ce3+/Tb3+.

Luminescence properties of a tunable blue-green-emitting Ca10(PO4)6S:Ce3+,Tb3+ phosphors for UV-excited white LEDs

We have synthesized a series of Ce3+- and Ce3+/Tb3+-activated Ca10(PO4)6S phosphors by solid state reaction method. The effect of Ce3+ concentration on the emission intensity of Ca10(PO4)6S:Ce3+ is studied, and the emission intensity reaches a maximum at 6% Ce3+. The energy transfer from the Ce3+ to Tb3+ ions is observed. The emission spectra of the Ca10(PO4)6S:Ce3+,Tb3+ phosphors show the blue broad band at 410 nm and the green line peaking at 550nm, originating from the Ce3+and Tb3+ ions, respectively. The results indicate that the emission color varied from blue to green can be achieved by tuning the Ce3+/Tb3+ ratio based on the principle of energy transfer. In addition, the mechanism of the energy transfer from the Ce3+ to Tb3+ ions is of dipole-quadrupole type, as demonstrated by the Inokuti–Hirayama (I–H) model. The critical distance between the ions calculated by concentration quenching (10.39 Å) and spectral overlap methods (11.56 Å) are consistent, which testifies the energy transfer mechanism type.

Spectral-overlap approach to multiframe superresolution image reconstruction.

Various techniques and algorithms have been developed to improve the resolution of sensor-aliased imagery captured with multiple subpixel-displaced frames on an undersampled pixelated image plane. These dealiasing algorithms are typically known as multiframe superresolution (SR), or geometric SR to emphasize the role of the focal-plane array. Multiple low-resolution (LR) aliased frames of the same scene are captured and allocated to a common high-resolution (HR) reconstruction grid, leading to the possibility of an alias-free reconstruction, as long as the HR sampling rate is above the Nyquist rate. Allocating LR-frame irradiances to HR frames requires the use of appropriate weights. Here we present a novel approach in the spectral domain to calculating exactly weights based on spatial overlap areas, which we call the spectral-overlap (SO) method. We emphasize that the SO method is not a spectral approach but rather an approach to calculating spatial weights that uses spectral decompositions to exploit the array properties of the HR and LR pixels. The method is capable of dealing with arbitrary aliasing factors and interframe motions consisting of in-plane translations and rotations. We calculate example reconstructed HR images (the inverse problem) from synthetic aliased images for integer and for fractional aliasing factors. We show the utility of the SO-generated overlap-area weights in both noniterative and iterative reconstructions with known or unknown aliasing factor. We show how the overlap weights can be used to generate the Green's function (pixel response function) for noniterative dealiasing. In addition, we show how the overlap-area weights can be used to generate synthetic aliased images (the forward problem). We compare the SO approach to the spatial-domain geometric approach of O'Rourke and find virtually identical high accuracy but with significant enhancements in speed for SO. We also compare the SO weights to interpolated weights and find that the overlap-area weights lead to significantly smaller errors in iterative reconstructions. We consider how the SO method might be extended to account for the influence of the optical transfer function, more complex or space-variant motions, the registration process, and noise.

Luminescent properties and energy transfer of CaO:Ce3+, Mn2+ phosphors for white LED

We have synthesized yellow–orange CaO:Ce3+,Mn2+ phosphors by solid-state reaction. Photoluminescence properties and energy transfer mechanism from Ce3+ to Mn2+ ions have been investigated. The Ce3+ activated phosphors exhibit strong absorption in the range of 250–490nm and a yellow emission centered at 554nm. When Mn2+ ions were codoped, CaO:Ce3+,Mn2+ phosphors exhibit yellow emission band of Ce3+ as well as orange emission band centered at 600nm of Mn2+. We observed an efficient energy transfer from Ce3+ to Mn2+ ions in CaO:Ce3+,Mn2+, which was verified from the lifetime decay curves and was discussed by Dexter׳s energy transfer theory. The critical distance of the energy transfer from Ce3+ to Mn2+ ions has also been calculated to be 12.3Å by spectral overlap methods following Dexter׳s theory and by concentration quenching mechanism to be 15.2Å. Moreover, by combining the synthesized phosphors and InGaN blue chip (460nm), warm-white light has been created.

Luminescence properties of a novel green emitting Ba2CaZn2Si6O17:Eu2+ phosphor for white light – Emitting diodes applications

A novel green emitting Ba2CaZn2Si6O17:Eu2+ (BCZSO:Eu2+) phosphor was synthesized using conventional high temperature solid state reaction method. Powder X-ray diffraction was carried out to confirm the phase formation of the synthesized phosphors. Photoluminescence emission spectrum was recorded under excitation at 340 nm. The BCZSO:Eu2+ phosphor exhibited an intense asymmetric green emission band around 502 nm which originated from the 4f65d1 → 4f7 transition of Eu2+ ion. The optimum doping concentration of Eu2+ was found to be 0.06 mol. The energy transfer mechanism among Eu2+ in BCZSO phosphor was found to be a dipole–dipole interaction, and the critical distance (RC) for the Eu2+ ions calculated by the concentration quenching and spectral overlap methods were 23.2 Å and 13.7 Å, respectively. The decay curve of BCZSO:Eu2+ phosphors were discussed. The CIE chromaticity coordinate values (x = 0.259, y = 0.463) of BCZSO:Eu2+ phosphor were located in green region and the correlated color temperature was 7571 K. All these properties gave an indication that BCZSO:Eu2+ phosphor could be a potential green-emitting phosphor for UV based white light emitting diodes.

Ca9Sc(PO4)7:Ce3+,Mn2+ – A Red‐Emitting Phosphor Based on Energy Transfer

AbstractA series of novel color‐tunable phosphors, Ca9Sc(PO4)7:xCe3+,yMn2+ (CSP:xCe3+,yMn2+), have been synthesized by traditional high‐temperature solid‐state reactions. The optical properties of CSP:xCe3+ and CSP:0.02Ce3+,yMn2+ were systematically investigated with various spectral technologies. A phosphor with a broad, deep‐red emission, CSP:0.02Ce3+,0.1Mn2+, was prepared by an energy transfer process with the CIE chromaticity coordinates (0.669, 0.307). CSP:Ce3+,Mn2+ phosphors excited at 254 nm display two broad emission bands: one centered at around 360 nm is assigned to the 5d1–4f1 electronic transition of Ce3+ ions, and the other at about 650 nm is attributed to the 4T1 (4G) → 6A1 (6S) transition of Mn2+ ions. The energy transfer mechanism from Ce3+ to Mn2+ in the CSP:Ce3+,Mn2+ samples was discovered to be the dipole–dipole interaction, which was confirmed by the estimated critical distance between Ce3+ and Mn2+ (13.0 Å) by the spectral overlap method. Furthermore, the higher thermal stability of CSP:Ce3+,Mn2+ makes it feasible for a potential application in white‐light‐emitting diodes (WLEDs).

Tunable color of Ce3+/Tb3+-codoped Ba3Sr4(BO3)3F5 phosphors for near-UV-pumped LEDs

Single-component-tunable blue-to green-light-emitting phosphors Ba3Sr4(BO3)3F5: Ce3+, Tb3+, Na+ (BSBF: Ce3+, Tb3+, Na+) promising for near-UV-pumped light-emitting diodes (LEDs) were synthesized via high-temperature solid-state reactions, and their photoluminescence properties were systematically investigated. Upon the excitation of 360 nm, the BSBF: Ce3+, Tb3+, Na+ phosphors exhibited a broad blue emission band at 422 nm and a series of sharp emission lines at 490, 544, 585, and 623 nm, which originated from the 4f05d1–4f1 transition of Ce3+ ions, and 5D4–7FJ (J = 6, 5, 4, 3) transitions of Tb3+ ions, respectively. Through the resonance-type energy transfer, the varied emitted colors from blue through cyan and eventually to green were achieved by properly tuning the relative dopant composition of Ce3+/Tb3+. Moreover, the energy transfer from Ce3+ to Tb3+ in BSBF host matrix was demonstrated via the dipole–dipole interaction mechanism. Additionally, the critical distances (\( R_{\text{C}} \)) calculated by quenching concentration and spectral overlap method in such system were 2.166 and 1.940 nm, and the activation energy for thermal quenching (ΔE) was determined to be 0.117 eV. These results indicate that the developed color-tunable phosphors BSBF: Ce3+, Tb3+, Na+ are competitive as the promising single-component phosphor-converted materials for near-UV-pumped LEDs.