Spectroscopic and photoluminescence characteristics of Sm3+ doped calcium aluminozincate phosphor for applications in w-LED
TL;DR: In this paper, the crystal structure and phase analysis of the as-prepared phosphor has been carried out by X-ray Diffraction (XRD) studies and Morphology and functional groups present in the phosphor have been investigated thoroughly by using Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FT-IR) spectral measurements, respectively.
About: This article is published in Ceramics International.The article was published on 2017-07-01. It has received 76 citations till now. The article focuses on the topics: Phosphor & Photoluminescence.
Citations
More filters
TL;DR: In this article, the Inokuti-Hiryama (I-H) model applied to the decay spectral profiles confirms the energy transfer process between Tb 3 + -Tb 3+ ions as dipole-dipole in nature.
61 citations
TL;DR: In this article, the synthesis and characterization of nano-crystalline phosphors by incursion of Dy3+ ions into BaYAlZn3O7 matrix was reported.
43 citations
TL;DR: In this paper, a white emitting phosphate-based phosphor Ca3-xLix(PO4)2-x(SO4)x:Dy3+, Sm3+ with high emission intensity and lower correlated color temperature were successfully synthesized via the sol-gel method.
42 citations
TL;DR: In this article, a series of Sr1-xZrO3:xSm (x = 0.01, x = 1.11) samples were synthesized using the sol-gel process, and the reporting of the bandgap energies (Eg) for which the diffuse-reflectance spectra of the Sr0.97Zr O3:Sm0.03 phosphor was used, is based on the Kubelka-Munk (K-M) function.
40 citations
References
More filters
TL;DR: In this article, the resonance theory of Forster, which involves only allowed transitions, is extended to include transfer by means of forbidden transitions which, it is concluded, are responsible for the transfer in all inorganic systems yet investigated.
Abstract: The term ``sensitized luminescence'' in crystalline phosphors refers to the phenomenon whereby an impurity (activator, or emitter) is enabled to luminesce upon the absorption of light in a different type of center (sensitizer, or absorber) and upon the subsequent radiationless transfer of energy from the sensitizer to the activator The resonance theory of Forster, which involves only allowed transitions, is extended to include transfer by means of forbidden transitions which, it is concluded, are responsible for the transfer in all inorganic systems yet investigated The transfer mechanisms of importance are, in order of decreasing strength, the overlapping of the electric dipole fields of the sensitizer and the activator, the overlapping of the dipole field of the sensitizer with the quadrupole field of the activator, and exchange effects These mechanisms will give rise to ``sensitization'' of about 103−104, 102, and 30 lattice sites surrounding each sensitizer in typical systems The dependence of transfer efficiency upon sensitizer and activator concentrations and on temperature are discussed Application is made of the theory to experimental results on inorganic phosphors, and further experiments are suggested
7,635 citations
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.
Abstract: A simple equation to compute correlated color temperature (CCT) from CIE 1931 chromaticity coordinates x and y is given. Over the range of interest in color science, the errors are negligible. It was derived from the fact that the isotemperature lines for CCTs of principle interest nearly converge toward a point on the chromaticity diagram and the assumption that CCT may be represented by a third-order polynomial function of the reciprocal of the slope of the line from that point to the chromaticity of the light. the equation is useful in designing sources to simulate CIE colorimetric illuminants.
1,320 citations
TL;DR: In this paper, the free-ion Hamiltonian model and Judd-Ofelt theory have been used to analyze the energy level scheme and spectral intensities of Dy 3+ ions in CFB glasses.
221 citations
TL;DR: In this paper, compositional dependence of Judd-Ofelt parameters has been evaluated and these parameters are used to predict radiative lifetimes (τR) and branching ratios (βR) for some excited 4G(4)7/2, 4G (4)5/2), 6F11/2.
172 citations
TL;DR: A series of orange-red emitting Ba3La(PO4)3:xSm3+ (0.01≤x≤0.30) phosphors was synthesized by the convenient solid-state reaction.
161 citations