Effect of sodium oxide and sodium fluoride in gadolinium phosphate glasses doped with Eu2O3 content

Ravangvong, S.; Chanthima, N.; Rajaramakrishna, R.; Kim, H.J.; Kaewkhao, J.

doi:10.1016/j.jlumin.2019.116950

Cited by 35 publications

(11 citation statements)

References 48 publications

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“…Fluorides have relatively low phonon energy and weak electron–phonon coupling (EPC) effect on the d–d transition of Cr 3+ compared with oxides, which will be beneficial for developing the Cr 3+ NIR luminescence performances. , Song et al reported a Cr 3+ -doped fluoride of K 2 NaScF 6 :Cr 3+ with excellent luminescence thermal stability (89.6%), a high internal quantum efficiency (IQE = 74%), and an FWHM of 101 nm, which demonstrates that Cr 3+ -doped fluoride has great potential for NIR pc-LEDs application . Besides, Na 3 AlF 6 (λ max = 720 nm, IQE = 75%, FWHM = 95 nm), K 3 AlF 6 :Cr 3+ , and K 3 GaF 6 :Cr 3+ (λ max = 783 nm, IQE = 25 and 28%, FWHM = ∼100 nm) were also reported for NIR pc-LED application.…”

Section: Introductionmentioning

confidence: 99%

Trivalent Chromium Ions Doped Fluorides with Both Broad Emission Bandwidth and Excellent Luminescence Thermal Stability

Lin

Wang

Liao

et al. 2021

ACS Appl. Mater. Interfaces

131

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Recently, trivalent chromium ion doped phosphors have exhibited significant application potential in broadband near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs). However, developing an NIR phosphor with both broad emission bandwidth and excellent luminescence thermal stability is still a great challenge. Here, we demonstrate an NIR phosphor, ScF3:Cr3+, which can fulfill both conditions simultaneously. The prepared phosphors show broadband emission in the range of 700 to 1100 nm, with a full width at half-maximum (FWHM) of 140 nm peaking at 853 nm. These phosphors also demonstrate an excellent luminescence thermal stability (the emission intensity of ScF3:Cr3+ keeps 85.5% at 150 °C compared with the value at room temperature). An NIR pc-LED based on blue LED chips was fabricated and tested. The results show that the NIR pc-LED can yield strong broadband NIR emission. This work not only provides a promising phosphor for the application of NIR pc-LEDs but also has important guiding significance for effect of synthesis conditions on the luminescence properties of Cr3+-doped fluorides.

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Section: Introductionmentioning

confidence: 99%

Trivalent Chromium Ions Doped Fluorides with Both Broad Emission Bandwidth and Excellent Luminescence Thermal Stability

Lin

Wang

Liao

et al. 2021

ACS Appl. Mater. Interfaces

131

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“…For non-adiabatic (12) carrier mobility µ were calculated at temperature of 195˚C and found to vary from 9.710 × 10 −9 to 1.091 × 10 −6 [18], the hopping carrier concentration N C estimated from…”

Section: Charge Carrier Mobility and Densitymentioning

confidence: 99%

“…With alkali oxides of Na cations, the phosphate glasses have improved their thermal stability [11]. These are very promising materials for physical, chemical, optical and medical applications because of their high stability, controlled aqueous solubility and transparency in the wide spectral region [12]. In 65P 2 O 5 -15BaO-5Al 2 O 3 -5ZnO-10Na 2 O glass network added by B 2 O 3 content, the hardness and flexural strength were found high up to 6 mol% boron content, which indicates the improvement in mechanical properties of glass by inclusion of boron [13].…”

Section: Introductionmentioning

confidence: 99%

Studies of Anomalies in Mixed Conduction of Na2O and V2O5 Doped Boro-Phosphate Glasses

Jakhati¹,

Nadavalumane²,

Ashwajeet³

2022

NJGC

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A set of borophosphate glasses doped with alkali and transition metal (TM) ions have been synthesized. The glasses were carried through; annealing, XRD, density, DC conductivity studies. Molar volume and density varied nonlinearly. High temperature activation energy is analysed taking into consideration of Mott's SPH model. The low temperature electrical conductivity was analysed by Mott and Greaves VRH. Several polaron hopping related parameters at high temperature region and density of states at low temperature region were computed. The high temperature DC activation energy measured by conductivity, calculated numerous pertained parameters varied nonlinearly with mole fraction of vanadium content. The Study exhibits DC electrical conduction is due to both alkali and transition metal ions and thus confirms the mixed conductivity. A crossover conduction mechanism from the ionic dominant region to polaronic predominant region has been also observed.Studies revealed the single transition effect at 0.4 mol fraction of V 2 O 5 content.

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“…N a 2 O is the major contributor to manufacture glass followed by silicon [30]. In addition, N a 2 O has been found potential application in CO 2 sequestration [31], transparent materials [32], biomedical devices [33], and Nano grating glass [34]. Recently researchers have found its application in portable energy solutions due to its redox potential properties [35,38,39].…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: On Computation of Entropy Measures and Heat of Formation for Sodium Oxide Via Statistical models

Chen

Siddiqui

Javed

et al. 2023

Preprint

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The chemical graph theory is a new branch of applied chemistry in which we discuss the relationships between atoms and bonds and their chemical activities with the help of different combinatorial tools. A topological index is a numerical quantity that relates the thermodynamical properties of a chemical structure to its corresponding chemical graph. In this paper, we discuss the physical measures including heat of formation and entropy based on the topological properties of chemical graph of Sodium oxide. Moreover, relations between the topological indices and thermodynamical properties of Sodium oxide have been developed in the form of mathematical equations by applying different curve fitting techniques using MATLAB software. These methods have been selected on the basis of statistical tests including mean squared error, sum of squared error or $R^2$-test.

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Effect of sodium oxide and sodium fluoride in gadolinium phosphate glasses doped with Eu2O3 content

Cited by 35 publications

References 48 publications

Trivalent Chromium Ions Doped Fluorides with Both Broad Emission Bandwidth and Excellent Luminescence Thermal Stability

Trivalent Chromium Ions Doped Fluorides with Both Broad Emission Bandwidth and Excellent Luminescence Thermal Stability

Studies of Anomalies in Mixed Conduction of Na<sub>2</sub>O and V<sub>2</sub>O<sub>5</sub> Doped Boro-Phosphate Glasses

WITHDRAWN: On Computation of Entropy Measures and Heat of Formation for Sodium Oxide Via Statistical models

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Effect of sodium oxide and sodium fluoride in gadolinium phosphate glasses doped with Eu2O3 content

Cited by 35 publications

References 48 publications

Trivalent Chromium Ions Doped Fluorides with Both Broad Emission Bandwidth and Excellent Luminescence Thermal Stability

Trivalent Chromium Ions Doped Fluorides with Both Broad Emission Bandwidth and Excellent Luminescence Thermal Stability

Studies of Anomalies in Mixed Conduction of Na&lt;sub&gt;2&lt;/sub&gt;O and V&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt; Doped Boro-Phosphate Glasses

WITHDRAWN: On Computation of Entropy Measures and Heat of Formation for Sodium Oxide Via Statistical models

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Studies of Anomalies in Mixed Conduction of Na<sub>2</sub>O and V<sub>2</sub>O<sub>5</sub> Doped Boro-Phosphate Glasses