Emission Spectra Of Sm3 Research Articles

Alkali and mixed alkali effect: Spectral investigations on Sm3+ and Dy3+ ions doped zinc tungstate borophosphate glasses

In this study, we provide the spectra data of borophosphate zinc tungstate glasses doped with Sm3+or Dy3+ ions based on alkali and mixed alkali oxides. In order to describe the spectroscopic properties of the manufactured Sm3+ and Dy3+ glasses, we used XRD, EDAX, FT-IR, FT-Raman, Absorption, and PL Spectra. The amorphous nature of glass has been studied by looking at its X-ray diffraction data. Glasses that have been doped with Sm3+ and Dy3+ ions have been shown to exhibit significant absorption bands at 401 nm in the Vis-NIR range, as well as three weak bands at 360, 373, and 473 nm, and bands centered at roughly 1079, 1216, 1363, and 1455 nm in the NIR area. Multiple absorption bands at various wavelengths, from 796 nm to 1667 nm, are present in both series C and D glasses. After being excited at 402 nm, the emission spectra of Sm3+ doped glasses show three emission transitions at 562, 598, and 645 nm. The transition at 598 nm has been proven to produce brilliant orange-red light. Excitation at 350 nm in the emission spectra of Dy3+ doped glasses causes three emission transitions to occur at 482, 574, and 664 nm. The 574 nm emission band offers the clearest evidence of yellow emission. Energy level diagrams have been used to describe the emission process that occurs in these glasses.

Structural, morphological, and photoluminescence properties of RE (RE = Dy3+ , Eu3+ , Sm3+ )-doped CaAlBO4 phosphor synthesized by combustion method.

The CaAlBO4 :RE (RE = Dy3+ , Eu3+ , Sm3+ ) phosphor were prepared via combustion synthesis and studied by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) analysis, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), photoluminescence (PL) spectra and CIE coordinates. The phase formation of the obtained phosphor was analyzed by XRD and the result was confirmed by standard PDF Card No. 1539083. XRD data successfully indicated pure phase of CaAlBO4 phosphor. The crystal structure of CaAlBO4 phosphor is orthorhombic with space group Ccc2 (37). The SEM image of CaAlBO4 phosphor reveals an agglomerated morphology and non-uniform particle size. The EDS image provides evidence of the elements present and the chemical makeup of the materials. Under the 350 nm excitation, the emission spectrum of Dy3+ activated CaAlBO4 phosphor consists of two main groups of characteristic peaks located at 484 and 577 nm which are ascribed to 4 F9/2 → 6 H15/2 and 4 F9/2 → 6 H13/2 transition of Dy3+ respectively. The PL emission spectra of CaAlBO4 :Eu3+ phosphor shows characteristics bands observed around 591 and 613 nm, which corresponds to 5 D0 → 7 F1 and 5 D0 → 7 F2 transition of Eu3+ respectively, upon 395 nm excitation wavelength. The emission spectra of Sm3+ activated CaAlBO4 phosphor shows three characteristic bands observed at 565, 601 and 648 nm which emits yellow, orange and red color. The prominent emission peak at the wavelength 601 nm, which is attributed to 4 G5/2 → 6 H7/2 transition, displays an orange emission. The CIE color coordinates of CaAlBO4 :RE (RE = Dy3+ , Eu3+ , Sm3+ ) phosphor are calculated to be (0.631, 0.368), (0.674, 0.325) and (0.073, 0.185). As per the obtained results, CaAlBO4 :RE (RE = Dy3+ , Eu3+ , Sm3+ ) phosphor may be applicable in eco-friendly lightning technology.

Energy transfer in Sm3+/Eu3+ doped Li6Gd(BO3)3 orange-red phosphor

Sm3+ and Sm3+/Eu3+ doped Li6Gd(BO3)3 (LGBO) powders were prepared by solid-state reaction. The microstructure, luminescent characteristics, energy transfer and fluorescence lifetimes were studied. Gd3+ can absorb energy and transfer it to Sm3+ under 278 nm excitation, which increases the luminescent intensity of Sm3+ at 567, 611 and 649 nm. Under 405 nm excitation, the 4G5/2-6H5/2 transition belonging to Sm3+ and the 5D0-7F2 transition belonging to Eu3+ appear in the emission spectra of Sm3+/Eu3+ co-doped LGBO phosphors, glowing yellow-orange and red light, respectively. The mechanism behind the energy transfer was analyzed, and the energy transfer efficiency was calculated to be 31.2% when the Sm3+ concentration reached 4mol%. The LGBO:Sm3+/Eu3+ phosphors have prospective applications in solid-state lighting, display devices, bio-imaging, etc.

Synthesis and Photoluminescence Properties of Ca5(PO4)3F: Ln (Ln: Dy3+, Eu3+ and Sm3+) Phosphors for near UV-based solid state lighting

The wet chemical synthesis of Ca5(PO4)2F host with lanthanide doped Dy3+, Eu3+ and Sm3+ was reported. The X-ray diffraction (XRD), structural and photoluminescence characteristics of phosphors were thoroughly investigated. The hexagonal system with the space group P 63/m (176) was verified by X-ray powder diffraction. Under UV excitation (352 nm), Ca5(PO4)2F:Dy3+ emits 481 nm (blue) and 575 nm (yellow), corresponding to 4F9/2→6H15/2 (magnetic dipole) and 4F9/2→6H13/2 (electric dipole) transitions, respectively. When Ca5(PO4)2F:Eu3+ phosphor was excited at 394 nm, the emission spectra showed strong bands at 591 nm (orange) and 614 nm (red). When excited at 403 nm, the emission spectra of Sm3+ activated Ca5(PO4)2F phosphor displayed emission peaks at 565 nm (yellow) and 599 nm (orange), respectively. The research analyses the photoluminescence characteristics of Ca5(PO4)3F: Ln (Ln: Dy3+, Eu3+ and Sm3+) as a possible material for near UV-based solid-state lighting.

Effect of Li+, La3+ co-doping on the photoluminescence enhancement of Sr3AlO4F:Sm3+ orange-red-emitting phosphor for white light-emitting diodes

A series of Sr3AlO4F:Sm3+, La3+, Li+ orange-red-emitting phosphors were synthesized via a solid-state reaction with charge compensator Li+ co-doping for luminescence enhancement. The X-ray diffraction results demonstrated that all samples were consistent with standard Sr3AlO4F structure belonging to tetragonal phase with I4/mcm space group. The effects of La3+ co-doping and Li+ co-doping on the structure and luminescence properties of Sr3AlO4F:Sm3+ were investigated. The emission spectrum of Sm3+-doped phosphors was composed of several emission peaks at 565 nm (4G5/2→6H5/2), 602 nm (4G5/2→6H7/2) and 650 nm (4G5/2→6H9/2), respectively. After co-doping La3+, the luminescence intensity of Sr3AlO4F:Sm3+, La3+ sample was elevated to 1.46 times of that of Sr3AlO4F:Sm3+ phosphor, which is in consequence of the environmental effect of crystal field around luminescence center. Furthermore, depend on charge compensation effect, the luminescence intensity of Sr3AlO4F:Sm3+, La3+, Li+ phosphor was further enhanced by 1.48 times higher than that of Sr3AlO4F:Sm3+, La3+ phosphor. A w-LEDs device was packaged via coating the as-prepared phosphor on n-UV chip of 395 nm with commercial phosphors. These results indicated that there is a potential application for Sr3AlO4F:Sm3+, La3+, Li+ phosphor as orange-red component in w-LEDs.

Fabrication of potassium aluminium barium phosphate glasses doped with Sm3+ and their Judd-Ofelt analysis for orange lasing material application

Abstract Optical and luminescence behavior of potassium aluminium barium phosphate glasses doped with different concentration of Sm2O3 were investigated. These glasses were varied concentrations of Sm2O3 at 0, 0.05, 0.10, 0.50, 1.00 and 2.00 mol%. It was found that the intensity of absorption spectra were increase with increasing concentration of Sm2O3. Also, the absorption bands were attributed to Sm3+ transitions from the ground state 6H5/2 to the various excited states. The emission spectra of Sm3+ have been recorded under the excitation wavelength 401 nm for all the glass matrices. Judd-Ofelt (JO) theory has been successfully applied to characterize the absorption and luminescence spectra of these glasses. The measured intensities of absorption bands of these glasses, the JO intensity parameters (Ωλ, λ = 2, 4 and 6) have been evaluated. From all results illustrate that the potassium aluminium barium phosphate glasses doped with Sm2O3 have potential candidate in the development as orange lasing materials

Luminescence Performance of BaGd2ZnO5 Microcrystalline Powder Doped with Different Rare Earth Ions

A group of BaGd2ZnO5 microcrystalline powders doped with Sm[Formula: see text], Dy[Formula: see text], Nd[Formula: see text] and Er[Formula: see text]/Yb[Formula: see text] were prepared by high temperature solid phase method, respectively. X-ray diffraction (XRD) analysis confirmed that all the products were pure BaGd2ZnO5 crystals, belonging to orthorhombic system and Pbnm space group. The emission spectra of Sm[Formula: see text], Dy[Formula: see text], Nd[Formula: see text] single-doped and Er[Formula: see text]/Yb[Formula: see text] double-doped samples under specific wavelength excitation were measured. The change of luminescence intensity at strong emission peak with doping concentration of doped ions was studied, and concentration quenching effect was found. The CIE color coordinates of the prepared samples were calculated. The results show that all coordinates doped with Sm[Formula: see text] are located in the orange red region. All coordinates of Dy[Formula: see text] doping samples are located in the yellow light region, but close to the white light region. All coordinates of Nd[Formula: see text] doping sample are located in the blue-green region. The upconversion luminescence of Er[Formula: see text]/Yb[Formula: see text] co-doped sample belongs to yellow light region.

Photoluminescence Characterization of Sm3+-DOPED SrIn2O4 Prepared by a Solution Combustion Method

Sm3+-doped SrIn2O4 phosphors were prepared by a solution combustion method. The synthesized phosphors were characterized using powder XRD. The excitation and emission spectra of Sm3+-doped SrIn2O4 materials were analyzed at room temperature. SrIn2O4:Sm3+ phosphor emits 568–578, 606–617, 660, and 720 nm light under ultraviolet excitation of 300 nm. The photoluminescence properties of the synthesized phosphors with different Sm3+-doping concentrations were investigated. The optimum concentration of Sm3+ ion in SrIn2O4 was found to be 0.02 mol.

The Luminescence Properties of Sm3+ or Tb3+ —doped Lu3Ga2Al3O12 Phosphors for X-ray Imaging

Sm3+ or Tb3+ -doped Lu3Ga2Al3O12 phosphors were synthesized by using a solid-state reaction method with Lutetium oxide, gallium oxide and aluminum oxide as host materials, samarium oxide and terbium oxide as doping materials. The mixed powders were sintered at 1500 °C for 5 hours by using a horizontal furnace. In this study, the structures of Sm3+ or Tb3+ -doped Lu3Ga2Al3O12 phosphors were observed using an XRD (X-ray diffraction). The emission spectrum of Sm3+ -doped Lu3Ga2Al3O12 phosphor shows 550–650 nm in wavelength due to 4Gj to 6Hj. The measurement of emission spectrum of Tb3+ -doped Lu3Ga2Al3O12 phosphor was confirmed to 450 to 650 nm wavelength due to 5Dj to 7Fj. These phosphors have a sharp emission spectrum due to their physical properties of f-f transition. The Lu3Ga2Al3O12 has a high effective Z-number (Zeff = 57) which is sensitive to X-ray or γ-ray. Therefore Sm3+ or Tb3+ -doped Lu3Ga2Al3O12 phosphors can be applied for diagnostic X-ray imaging in the medical field.

Sm3+-Doped Molybdenum Gadolinium Borate Glasses for Orange Emission Laser Active Medium

Room temperature visible and near infrared optical absorption and emission spectra of Sm3+-doped molybdenum gadolinium borate (MGB) glasses with molar composition 25MoO3-20Gd2O3–(55 − x)B2O3−xSm2O3 (x = 0.05, 0.1, 0.5, 1.0, 2.0 mol.%) have been analyzed. The experimental oscillator strengths of absorption bands have been used to determine the Judd–Ofelt (J–O) parameters. Fluorescence spectra were recorded by exciting the samples at 402 nm. Using the J–O parameters and luminescence data, the radiative transition probabilities (AR), branching ratios (BR), and stimulated emission cross-sections oe) are obtained. The decay curves of the 4G5/2 - 6H7/2 transition exhibit a non-exponential curve fit for all concen-trations. The concentration quenching has been attributed to the energy transfer through the cross-relaxation between Sm3+ ions. 4G5/2 level and its relative quantum efficiencies are measured. Intense reddish-orange emission corresponding to the 4G5/2−6H7/2 transition has been observed in these glasses at the 487-nm excitation, From the values of the radiative parameters, it is concluded that the 1.0-mol% Sm3+-doped MGB glass may be used as a laser active medium with the emission wavelength at 599 nm. The analysis of the non-exponential behavior of decay curves through the Inokuti–Hirayama model indicates that the energy transfer between Sm3+ ions is of dipole–dipole type. The quantum efficiency for the 4G5/2 level of MGBSm10 glass is found to be 67%. The co-related color temperature obtained from CIE (Commission International de L’Eclairage) for these glass samples is ∼1620 K for the indicated orange emission at the 402-nm excitation.

Structural and luminescence properties of Sm3+ -doped bismuth phosphate glass for orange-red photonic applications.

In the present study, the effect of bismuth oxide (Bi2 O3 ) content on the structural and optical properties of 0.5Sm3+ -doped phosphate glass and the effect of concentration on structural and optical properties of Sm3+ -doped bismuth phosphate (BiP) glass were studied. Structural characterization was accomplished using X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), Fourier transform infrared (FTIR) spectroscopy and 31 P nuclear magnetic resonance (NMR) spectroscopy. Optical properties were studied using absorption, photoluminescence and decay measurements. Using optical absorption spectra, Judd-Ofelt parameters were derived to determine the local structure and bonding in the vicinity of Sm3+ ions. The emission spectra of Sm3+ -doped BiP glass showed two intense emission bands, 4 G5/2 →6 H7/2 (orange) and 4 G5/2 →6 H9/2 (red) for which the stimulated emission cross-sections (σe ) and branching ratios (β) were found to be higher. The quantum efficiencies were also calculated from decay measurements recorded for the 4 G5/2 level of Sm3+ ions. The suitable combination of Bi2 O3 (10mol%) and Sm3+ (0.5mol%) ions in these glasses acted as an efficient lasing material and might be suitable for the development of visible orange-red photonic materials.

Luminescence enhancement of Cd2V2O7:Re3+ (Re = Pr, Sm) red phosphors through Li+ ions charge compensation

Novel Cd2V2O7:Re3+, Li+ (Re = Pr, Sm) red phosphors were synthesized using a high-temperature solid state reaction, where Li+ was utilized as a charge compensator for luminescence enhancement. X-ray diffraction indicated that all the as-prepared samples had Cd2V2O7 pure phase and their structures remained unchanged with Re3+ and Li+ doping. Emission spectra of Cd2V2O7:Pr3+ phosphors excited at 380nm revealed an orange-red emission with two apparent peaks at 580nm and 620nm, corresponding to the 1D2→3H4 and 3P0→3H6 electronic transitions of Pr3+. The emission spectra of Sm3+ doped Cd2V2O7 phosphors showed one strong peak at 607nm and two weak peaks at 572nm and 654nm, attributed to 4G5/2→6H7/2, 4G5/2→6H5/2 and 4G5/2→6H9/2 transitions, respectively. Moreover, the luminescence intensities of Cd2V2O7:Re3+ (Re = Pr, Sm) samples were enhanced observably by Li+ ions doping with charge compensation effect. Overall, these findings suggested that Cd2V2O7:Re3+, Li+ (Re = Pr, Sm) red phosphors can be used as a promising red component in near ultraviolet-excited white light-emitting diodes with improved performances.

Spectroscopic properties and Judd-Ofelt analysis of Sm3+ ions in barium sodium borate glasses

Barium sodium borate glasses doped with various concentrations of samarium oxide were prepared by melt-quenching technique. The density, molar volume and refractive index of the glass samples were carried out. The spectroscopic properties were studied by investigating absorption, excitation, and emission spectra of the glass samples. The absorption spectra were investigated in the UV-Vis-NIR region from 300 to 1800 nm. The strongest emission occurs when exciting the glass samples with 400 nm excitation wavelength (assigned as 6H5/2→6P3/2 transition). The emission spectra of Sm3+-doped glasses centered at 562 nm (4G5/2→6H5/2), 600 nm (4G5/2→6H7/2), 646 nm (4G5/2→6H9/2) and 706 nm (4G5/2→6H11/2) had been observed with 400 nm excitation wavelength. The results showed that the glass sample with 0.50 mol% of Sm2O3 gave the highest intensity of all samples. From CIE 1931 chromaticity diagram, the emission light of the glass samples was shown in orange region. Judd-Ofelt theory had been employed to obtain J-O parameters (Ω2, Ω4 and Ω6), oscillator strength (f), radiative transition possibility (AR), stimulated emission cross section (σ) and branching ratio (BR) of the glass samples. The parameters obtained from Judd-Ofelt analysis showed that the 0.50 mol% of Sm2O3 doped barium sodium borate glass from this work performed high potential for using as orange emitting material applications.

Spectroscopic investigations of Sm3+ doped Ca0.5La(MoO4)2 phosphor for solid state lighting applications

The Sm3+- doped Ca0.5La(MoO4)2 were successfully synthesized by the solid state reaction method. Indexed powder X-Ray diffraction pattern suggests the scheelite tetragonal crystal structure. Surface Morphology of the sample shows polyhedral morphology and the average particle size estimated from SEM image is 5.5 µm. The energy dispersive X-ray analysis confirms the existence of Ca, La, Mo, O, and Sm elements. The room temperature photoluminescence (PL) emission spectra of Sm3+- doped Ca0.5La(MoO4)2 with various concentrations upon 404 nm excitation were recorded. The PL emission spectra show three intense emission peaks at 565, 600 and 647 nm were owing to the f–f electronic transitions of 4f electrons of Sm3+ attributed to the transitions 4G5/2→6H5/2, 4G5/2→6H7/2 and 4G5/2→6H9/2 respectively. Among them, bright orange-red visible emission is obtained due to 4G5/2→6H9/2 transition. The decay time and color chromaticity co-ordinates were estimated. From the obtained results, the prepared powder phosphor Ca0.5La(MoO4)2:Sm3+ stands as a suitable candidate for the display and solid state lighting applications.

Red and blue emitting borate phosphor excited by near Ultraviolet Light

A highly intense reddish-orange and blue emitting borate phosphors YAl3(BO3)4:Sm3+ and LaMgB5O10:Ce3+ have been synthesized by a combustion synthesis method using urea as a fuel. Their luminescent properties have been studied over the 200–450 nm excitation range. The excitation and emission spectra of these phosphors were measured by a HITACHI F-7000 fluorescence spectrophotometer. The emission spectrum of Sm3+ in YAl3(BO3)4 phosphor monitored for 402 nm excitation composed of 564, 600, and 648 nm emission peaks, and the excitation spectra monitored at 600 nm emission shows peaks at 345, 362, 375, 402, 421 and 445 nm. The emission spectrum of Ce3+ in LaMgB5O10 phosphor exhibits a symmetrical band centered around 430 nm and excitation spectra monitored at 430 nm emission shows peaks at 272, 326 and 372 nm. The phosphors YAl3(BO3)4:Sm3+ and LaMgB5O10:Ce3+can be a promising red and blue-emitting phosphor for UV LED applications.

Compositional dependence of optical properties of Sm3+-doped Y3ScxAl5-xO12 polycrystalline ceramics

Disordered Sm3+ doped Y3ScxAl5-xO12 (Sm:YSxAG) polycrystalline ceramics with compositional parameter x=(0.05, 0.5, 1, 2) and different Sm3+ ions concentrations were obtained by solid state reaction method. XRD investigations show the linear increase of the lattice constant with compositional parameters x. New spectroscopic data obtained from high resolution optical absorption and emission spectra of Sm3+ doped YSxAG ceramics reveal composition effects on Sm3+ optical spectra: modification of the shapes and shifts of the lines, presence of the additional satellites and unresolved multicenter structure, etc. The analysis of these data allowed us to establish a partial structure of Sm3+ energy levels in Sm:YSxAG (x = 2) ceramics. The emission kinetics of the 4G5/2 level for different Sm3+ concentrations and Sc content in Sm:YSxAG were measured and analyzed.

Structural and optical properties of lithium sodium borate glasses doped with Sm3+ ions

Absorption and emission spectra of Sm 3+ doped lithium sodium borate (LNB) have been reported. The samples were prepared by the melt-quenching technique and characterized by X-ray diffraction (XRD), diffraction thermal analysis (DTA), Fourier transforms infrared (FTIR) spectroscopy and field emission scanning electron microscopy (FESEM). From the thermo-grams spectrum, glass transition (Tg), crystallization (Tc) and melting temperatures (Tm) have been evaluated. Direct and indirect optical band gaps have been calculated based on the glasses UV absorption spectra. These glasses have shown strong nine absorption bands with hypersensitive transition at 1221 nm (6 H 5/2→4 H 3/2) and five emission bands for the transition at 4 I 7/2→6 H 13/2 (green color), 4 I 7/2→6 H 7/2 (orange color), 4 I 7/2→6 H 9/2 (orange color), 4 I 7/2→6 H 11/2 (red color) and 4 I 7/2→6 H 13/2 (red color) with performing an excitation of 400 nm. The oscillator strengths, refractive index, ions concentration, polaron radius and other parameters have been calculated for each dopant.

Visible luminescence of Sm3+:K–Ca–Li fluorophosphate glasses

The Sm3+-doped fluorophosphate glasses have been prepared by conventional melt quenching technique and are characterized through structural and optical measurements. The refractive index, density, optical absorption, Judd–Ofelt parameters and spontaneous transition probabilities have been measured, calculated and analyzed. The emission spectra of Sm3+ ions in these glasses have been measured and an intense reddish-orange emission is observed. The luminescence decay curves exhibit single exponential at lower concentrations (⩽0.1mol%) and turn into non-exponential at higher concentrations (⩾0.5mol%). The lifetimes for the 4G5/2 level of Sm3+ ions are found to decrease (2.95–0.78ms) with increasing concentration (0.01–3.0mol%) due to energy transfer processes among Sm3+ ions. Inokuti–Hirayama model was applied in order to obtain information about interactions between the rare earth ions. The non-exponential decay curves are well-fitted to Inokuti–Hirayama model for S=6 indicating that the nature of the energy transfer process is of dipole–dipole type.

Spectroscopic and photoluminescence properties of Sm3+ ions in Pb–K–Al–Na phosphate glasses for efficient visible lasers

The Sm3+-doped lead phosphate glasses (PKAPbNSm:44P2O5–17K2O–9Al2O3–(24−x) PbO–6Na2O–xSm2O3, where x=0.1, 0.5, 1.0 and 2.0mol%) have been prepared by conventional melt quenching technique and are characterized through absorption and emission spectra and decay rate analysis. The partial energy level structure of Sm3+ ions in these glasses have been evaluated from the measured absorption and emission spectra using free-ion Hamiltonian model. The emission spectra of Sm3+ ions in these glasses have been measured using 488nm line of Ar+ laser as an excitation source. The decay rates for 4G5/2 level of Sm3+ ions have been measured and are found to exhibit single exponential nature at lower concentration (0.1 and 0.5mol% Sm2O3-doped glass) and turns into non-exponential at higher concentrations (≥1.0mol% Sm2O3-doped glasses). The experimental lifetimes for 4G5/2 level of Sm3+ ions are found to decrease from 2.34 to 1.24ms when the concentration is increased from 0.1 to 2.0mol% Sm2O3 due to cross-relaxation energy transfer. The non-exponential decay rates are well-fitted to Inokuti-Hirayama model for S=6, indicates that the energy transfer is of dipole–dipole type.

Visible luminescence characteristics of Sm3+ doped Zinc Alumino Bismuth Borate glasses

Zinc Alumino Bismuth Borate (ZnAlBiB) glasses at different compositions doped with 1mol% of Sm3+ ions were prepared by using the melt quenching technique and investigated by XRD, optical absorption, emission and decay curve analysis to understand the visible luminescence of these glasses. From the absorption spectra the JO parameters are evaluated and are used to calculate the radiative properties such as transition probability, radiative lifetime, branching ratio and absorption cross-sections for various fluorescent levels of Sm3+ ions. The emission spectra of Sm3+ ions doped ZnAlBiB glasses show two intense emission bands 4G5/2→6H7/2 (orange) and 4G5/2→6H9/2 (red) for which the stimulated emission cross-section and branching ratios are evaluated to understand the potentiality of these materials as visible lasers. The decay profiles for the 4G5/2 fluorescent level of Sm3+ doped ZnAlBiB glasses have been recorded to measure the quantum efficiency (η) of these glasses. The strong visible emissions, large stimulated emission cross-sections, high branching ratios and good quantum efficiencies observed for the present ZnAlBiB glasses suggest the suitability of these glasses as laser and photonic devices operating in visible region.