Journal ArticleDOI
Dy3+ doped tellurite glasses for solid-state lighting: An investigation through physical, thermal, structural and optical spectroscopy studies
Reads0
Chats0
TLDR
In this article, a series of Dy3+ ion doped tellurite glasses in the (50-x)TeO2-25WO3-25Li2O-xDy2O3 system were synthesized using conventional melt quenching technique to investigate colorimetric and radiative properties of dy3+ ions in a new and stable host for their evaluation as solid-state lighting materials.Abstract:
In the present work, a series of Dy3+ ion doped tellurite glasses in the (50-x)TeO2-25WO3-25Li2O-xDy2O3 system were synthesized using conventional melt quenching technique to investigate colorimetric and radiative properties of Dy3+ ions in a new and stable host for their evaluation as solid-state lighting materials. Physical and structural properties were studied through density calculations, refractive index measurements, and Fourier-transform IR spectroscopy analysis. Thermal properties of glasses – glass transition (Tg) and crystallization (Tc/Tp) temperatures and temperature difference (ΔT) – were determined using differential scanning calorimetry. Optical absorption spectra of glasses were recorded with Vis-NIR spectrophotometer. CIE color coordinates, correlated color temperature, color rendering index and yellow to blue emission intensity ratio values were obtained through photoluminescence analysis. Radiative properties such as, radiative transition probability, stimulated emission cross-section, branching ratio and optical bandwidth gain were calculated according to Judd-Ofelt theory. The obtained optical spectroscopy results were found to be comparable or better than other reported glass systems. From the derived results, glasses with Dy3+ ion concentration lower than 0.5 mol% were found to show the closest CIE color coordinate values to pure white light and highest CCT and CRI values revealing good potentiality to be used for applications in white LEDs and solid-state lasers.read more
Citations
More filters
Journal ArticleDOI
Physical, mechanical and gamma-ray shielding properties of highly transparent ZnO-MoO3-TeO2 glasses
M. Çelikbilek Ersundu,A.E. Ersundu,N. Gedikoğlu,Erdem Şakar,Mehmet Büyükyıldız,Murat Kurudirek +5 more
TL;DR: In this article, the physical, mechanical and radiation shielding properties of ZnO-MoO3-TeO2 glasses were studied for a 133Ba radioactive source emitting gamma rays in the range of 79.61 to 383.80
Journal ArticleDOI
Size-controlled emission of long-time durable CsPbBr3 perovskite quantum dots embedded tellurite glass nanocomposites
TL;DR: In this paper, CsPbBr3 PQDs are successfully embedded inside a tellurite-based glass via melt-quenching and subsequent heat-treatment, and they exhibit superior thermal and chemical durability and impressively stable photoluminescence properties due to strong protection of the glass host.
Journal Article
Photoluminescence and Energy Transfer Studies of Dy3+ Ions Doped Lithium Lead Alumino Borate Glasses for W-LED and Laser Applications
Nisha Deopa,A.S. Rao +1 more
TL;DR: In this paper, LiPbAlB glasses with Dy 3+ ions with varying concentration were synthesized by using the melt quenching technique to understand their feasibility in solid state lighting and laser devices.
Journal ArticleDOI
Judd-Ofelt itemization and influence of energy transfer on Sm3+ ions activated B2O3–ZnF2–SrO–SiO2 glasses for orange-red emitting devices
TL;DR: In this article, the authors presented absorption, photoluminescence (PL), energy transfer and color chromaticity parameterization of ZSFBSi glass doped with Sm3+ ions concentrations.
Journal ArticleDOI
Physical, thermal, optical, structural and nuclear radiation shielding properties of Sm2O3 reinforced borotellurite glasses
Gokhan Kilic,Shams A.M. Issa,Shams A.M. Issa,Erkan Ilik,Ozge Kilicoglu,U. Gokhan Issever,Raouf El-Mallawany,Bashar Issa,Huseyin Ozan Tekin +8 more
TL;DR: In this article, the effect of samarium (III) oxide reinforcement on physical, thermal, optical, structural and nuclear radiation attenuation properties was investigated with a group of novel borotellurite glasses.
References
More filters
Journal ArticleDOI
Optical absorption intensities of rare-earth ions
TL;DR: In this paper, an expression for the oscillator strength of a transition between two states of the ground configuration $4{f}^{N}, on the assumption that the levels of each excited configuration of the type $4 {f} n{n}^{\ensuremath{'n}d$ or $4
Journal ArticleDOI
Intensities of Crystal Spectra of Rare‐Earth Ions
TL;DR: In this article, the transition probability of pure-electronic electric dipole transitions between levels of the 4-fluorescence configuration perturbed by a static crystalline field is treated.
Journal ArticleDOI
Conduction in non-crystalline systems V. Conductivity, optical absorption and photoconductivity in amorphous semiconductors
E. A. Davis,Nevill Mott +1 more
TL;DR: In this article, the experimental evidence concerning the density of states in amorphous semiconductors and the ranges of energy in which states are localized is reviewed; this includes d.c and a.c. conductivity, drift mobility and optical absorption.
Journal ArticleDOI
Electronic Energy Levels in the Trivalent Lanthanide Aquo Ions. I. Pr3+, Nd3+, Pm3+, Sm3+, Dy3+, Ho3+, Er3+, and Tm3+
TL;DR: In this article, the free-ion energy-level schemes of the Pr3+, Nd3+, Pm3+, Sm3+, Dy3, Dy3+, Ho3+, Er3+, and Tm3+ aquo ions have been determined from their absorption spectra in dilute acid solution at 25°.
Journal ArticleDOI
Correlated color temperature as an explicit function of chromaticity coordinates
TL;DR: In this paper, a simple equation to compute correlated color temperature (CCT) from CIE 1931 chromaticity coordinates x and y is given, which is useful in designing sources to simulate CIE colorimetric illuminants.