Spectroscopic and luminescence properties of Ho3+ ions doped Barium Lead Alumino Fluoro Borate glasses for green laser applications

Rani, Rekha; Venkateswarlu, M.; Swapna, K.; Mahamuda, Sk.; Prasad, M.; Rao, A.S.

doi:10.1016/j.solidstatesciences.2020.106175

Cited by 30 publications

(17 citation statements)

References 61 publications

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“…In order to investigate the effect of Ho 3+ doping on the physical and optical properties of the prepared glasses, various physical and optical parameters, such as, density, molar volume, average boron-boron separation, packing density, oxygen packing density (OPD), average coordination number, concentration of holmium ions (C Ho 3+ ), holmium inter-ionic distance (r i ), polaron radius (r p ), field strength (F) of holmium field, molar refractivity, polarizability, reflection loss, transmission coefficient, and dielectric constant were evaluated using the various theoretical formulae [18,[21][22][23] and experimentally acquired results.…”

Section: Physical Properties With Theoretical Discussionmentioning

confidence: 99%

“…This band has a tiny inclination for moving to a higher wave number called the blue shift. A higher bond strength value reduces the length of bond [18][19][20][21][22][23][24]. In this way, Ho increased the structure groups' compactness.…”

Section: Structural Analysis From Ftir Spectroscopymentioning

confidence: 98%

“…The ground condition ( 5 I 8 ) of Ho 3+ -ions with a 4f transition was detected in seven transitions in the UV-Vis-NIR area, as can be seen in the standard spectra (Figure 7) of the B05H sample. Peak transitions of 417,450, 486, 538, 642, 1152 and 1948 nm are assigned to ( 5 G, 3 G) 5 , 5 G 6 , 5 F 3 , 5 S 2 , 5 F 5 , 5 I 6 and 5 I 7, respectively [13,18,29,30]. Among all transitions, 5 G 6 is a hypersensitive transition that is specific to the surrounding atmosphere of the Ho 3+ -ions; it follows the selection rules |∆S| = 0, |∆L| ≤ 2 and |∆J| ≤ 2.…”

Section: Uv-vis-nir Analysis With Tauc's Plotsmentioning

confidence: 99%

“…The host, temperature and Ho 3+ concentration are the main determinants of green and red emission intensity. Ho 3+ : oxides study is also predicated on the promise of a shortwave laser powered by a long wavelength optical pump as a solid-state longitudinal laser [17,18]. Low-phononamorphous glasses, with rare earth ions, have been said to be very promising in the development of nearinfrared laser sources.…”

Section: Introductionmentioning

confidence: 99%

“…Low-phononamorphous glasses, with rare earth ions, have been said to be very promising in the development of nearinfrared laser sources. The glasses exhibit better thermal stability, reduced phonon energy and a decreased OH absorption coefficient with the addition of Holmium ions into the basic composition [17,18]. This leads to a greater stimulated emission cross-section and a longer emission life when rare earth ions undergo a near-infrared laser transition [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Concentration Dependent Improved Spectroscopic Characteristics and Near White Light Emission in Boro Phosphate Glasses Doped with Holmium

Ansari

Alshahrie

et al. 2022

Applied Sciences

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The physical, structural, thermal, and optical properties of heavy metal (Ho3+) oxide incorporated lithium-boro-phosphate glass prepared utilizing melt quenching process are presented in this paper as a function of dopant concentration. To support the findings of the FTIR and DSC studies, many theoretical, experimental, physical, and optical parameters were calculated. XRD and FTIR measurements revealed the prepared glasses’ amorphous nature and the presence of significant borate functional groups. The optical band gap, Urbach energy, and steepness characteristics were tested to validate the structural results. The emission spectrums were recorded in the prepared glasses for an excitation of 450 and 550 nm to find powerful emission color. The color co-ordinates (0.33, 0.41) were found to be quite comparable to white light color co-ordinates. The present glasses can, therefore, be ideal candidates for possible applications with light-emitting diodes.

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Section: Physical Properties With Theoretical Discussionmentioning

confidence: 99%

Section: Structural Analysis From Ftir Spectroscopymentioning

confidence: 98%

Section: Uv-vis-nir Analysis With Tauc's Plotsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Concentration Dependent Improved Spectroscopic Characteristics and Near White Light Emission in Boro Phosphate Glasses Doped with Holmium

Ansari

Alshahrie

et al. 2022

Applied Sciences

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Ho³⁺‐doped BaGd₂ZnO₅ green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Ayoub,

Kumar

2024

Luminescence

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In this work, we present the synthesis of a green‐emitting series of BaGd2ZnO5:xHo3+ (0.5–3 mol%) phosphors using a high‐temperature solid‐state reaction method. Phase purity and crystal structure information were evaluated through X‐ray powder diffraction patterns. Optical properties were examined through diffuse reflectance spectra, revealing that the prepared phosphor exhibited a band gap of 4.65 eV. The effect of Ho3+ doping on the morphology and ion distribution on the surface was assessed using scanning electron microscopy and time‐of‐flight secondary ion mass spectrometry techniques, respectively. The excitation spectra of the synthesized phosphor exhibited a charge transfer band and strong absorption transitions. The emission spectra displayed typical holmium emission characteristics, featuring a strong green emission band associated with f–f transitions from 5F4 + 2S2 → 5I8. Decay dynamics of the synthesized phosphor exhibited a single‐exponential decay pattern, with lifetimes ranging from 0.103 to 0.053 ms. The intrinsic radiative lifetime, calculated through Auzel's fitting was determined to be 0.14 ms. Using the emission spectra, colorimetric behaviour was analyzed, revealing that the Commission Internationale de l'éclairage (CIE) coordinates exclusively lay within the green region at (0.285, 0.705), with an impressive colour purity of 99.6%. Given these marked properties, the synthesized phosphor exhibits great potential for a wide range of green‐emitting applications, including displays, white light‐emitting diodes, and security signage.

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Optical, vibrational, and photoluminescence properties of holmium‐doped boro‐bismuth‐germanate glasses

Rathaiah,

Ravanamma,

Ravi

et al. 2024

Luminescence

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Holmium (Ho3+)‐doped boro‐bismuth‐germanate glasses having the chemical composition (30‐x)B2O3 + 20GeO2 + 20Bi2O3 + 20Na2O + 10Y2O3 + xHo2O3, where x = 0.1, 0.5, 1.0, and 2.0 mol% were prepared by melt‐quenching technique. The prepared glasses were examined for thermal, optical, vibrational, and photoluminescent properties. The prepared glasses were found to be thermally very stable. The optical bandgap and Urbach energies of 0.1 mol% Ho2O3‐doped boro‐bismuth‐germanate glass were calculated to be 3.3 eV and 377 MeV, respectively, using the absorption spectrum. The Judd–Ofelt analysis was performed on the 0.1 mol% Ho2O3‐doped glass and compared the obtained parameters with literature. The branching ratio (β) and emission cross‐section (σem) of the green band were determined to be 0.7 and 0.24 × 10−20 cm2, respectively. Under 450 nm excitation, a strong green emission around 550 nm was observed and assigned to the (5S2 + 5F4) → 5I8 (Ho3+) transition. Upon an increase of Ho2O3 content from 0.1 to 2.0 mol%, the intensities of all observed emission bands as well as decay time of the (5S2 + 5F4) → 5I8 transition have been decreased gradually. The reasons behind the decrease in emission intensity and decay time were discussed. The strong green emission suggests that these glasses may be a better option for display devices and green emission applications.

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Spectroscopic and luminescence properties of Ho3+ ions doped Barium Lead Alumino Fluoro Borate glasses for green laser applications

Cited by 30 publications

References 61 publications

Concentration Dependent Improved Spectroscopic Characteristics and Near White Light Emission in Boro Phosphate Glasses Doped with Holmium

Concentration Dependent Improved Spectroscopic Characteristics and Near White Light Emission in Boro Phosphate Glasses Doped with Holmium

Ho³⁺‐doped BaGd₂ZnO₅ green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Optical, vibrational, and photoluminescence properties of holmium‐doped boro‐bismuth‐germanate glasses

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Spectroscopic and luminescence properties of Ho3+ ions doped Barium Lead Alumino Fluoro Borate glasses for green laser applications

Cited by 30 publications

References 61 publications

Concentration Dependent Improved Spectroscopic Characteristics and Near White Light Emission in Boro Phosphate Glasses Doped with Holmium

Concentration Dependent Improved Spectroscopic Characteristics and Near White Light Emission in Boro Phosphate Glasses Doped with Holmium

Ho3+‐doped BaGd2ZnO5 green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Optical, vibrational, and photoluminescence properties of holmium‐doped boro‐bismuth‐germanate glasses

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Ho³⁺‐doped BaGd₂ZnO₅ green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties