Photophysical and photoluminescence properties of co-activated ZnS:Cu,Mn phosphors

Wang, Wendeng; Huang, Fuqiang; Xia, Yujuan; Wang, Anbao

doi:10.1016/j.jlumin.2007.10.003

Cited by 48 publications

(17 citation statements)

References 28 publications

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“…In fact, several reports have shown the known emission of Cu + ions in a variety of emission peaks, for instance around 410 nm, 27 520 nm, 28 560 nm, 29 570 nm, 30 575 nm, 31 where the more red-shifted emissions are typically associated with the embedded host. It is worth to note that this broad yellow emission shows an ultra-broad band with a FWHM of about 200 nm, which is about twice as broad as that of Cu + emissions in other materials, [27][28][29][30][31][32][33][34] evidencing its suitable application in high color rendering index lighting sources. This amazing width suggests the presence of two overlapping bands originating at two distinct Cu + emitting centers in TTCP host.…”

Section: Resultsmentioning

confidence: 96%

Rare‐Earth Free Phosphors with Ultra‐Broad Band Emission Application for High Color Rendering Index Lighting Source

et al. 2015

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Rare‐earth containing phosphors have been widely applied in lighting and display fields in the past century. Lower cost rare‐earth free phosphors with high performance are highly desired driven by the exhaustion of rare earth resources and the requirement of cheaper production. Herein, Cu+ ions doped tetracalcium phosphate (TTCP) yellow emitting phosphors with quantum yield of 21% are exploited. Particularly, ultra‐broad band emission with a full width at half maximum (FWHM) about 200 nm throughout almost entire visible light region is observed for TTCP: Cu+ phosphors, evidencing its promising application in high color rendering index (CRI) lighting source. White light emission with CRI value about 94.3 is generated by combining this TTCP: Cu+ phosphor with commercial BaMgAl10O17: Eu2+ blue phosphor, exhibiting superiority over the traditional trichromatic phosphors. Therefore, we predict great potential application for this cheaper rare‐earth free TTCP: Cu+ phosphor in high CRI lighting sources.

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Section: Resultsmentioning

confidence: 96%

Rare‐Earth Free Phosphors with Ultra‐Broad Band Emission Application for High Color Rendering Index Lighting Source

et al. 2015

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“…b ) obey the rule that the A factor declines with increasing covalency of the systems [51]. 4. It is noted that the magnitudes of the hyperfine structure constants for Mn 2+ in the II-VI semiconductors show a decrease with an increase of the ligand covalency, i.e., ZnS < ZnSe < ZnTe~CdTe.…”

Section: Discussionmentioning

confidence: 92%

“…Mn 2+ doped II-VI semiconductors ZnX (X = S, Se, Te) and CdTe have interesting optical [1,2], luminescence [3,4], laser [5], electronic-energy-level [6][7][8][9][10], and magnetic [11] properties. Usually, these properties may sensitively correlate to the electronic states of the impurity Mn 2+ in the hosts, which can probe the microscopic mechanisms and local behaviours of these systems with the aid of the electron paramagnetic resonance (EPR) technique.…”

Section: Introductionmentioning

confidence: 99%

Investigations of the spin Hamiltonian parameters for the cubic Mn²⁺ centers in ZnX (X = S, Se, Te) and CdTe

Wang

et al. 2010

Can. J. Phys.

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The spin Hamiltonian parameters (g factors and the hyperfine structure constants) for the cubic Mn 2+ centers in ZnX (X = S, Se, Te) and CdTe are investigated theoretically using the perturbation formulas of these parameters for a tetrahedral 3d 5 cluster containing both the crystal-field and charge-transfer contributions. The relevant molecular orbital coefficients are uniformly determined from the cluster approach, and the calculated spin Hamiltonian parameters are in good agreement with the observed values. The g-shifts of the g factors related to the pure spin value gs (& 2.0023) arising from the charge transfer contributions are opposite (positive) in sign and much larger in magnitude than those from the crystal field contributions. On the other hand, the contributions from the charge-transfer mechanism to the hyperfine structure constants are the same in sign and about 20%-30% in magnitude of those from the crystal-field mechanism. The importance of the charge transfer contributions increases significantly with the increase of the covalency and the spin-orbit coupling coefficient of the ligand, i.e., S 2-< Se 2-< Te 2-.Résumé : Nous faisons une étude théorique des paramètres du Hamiltonien de spin (les facteurs g et les constantes de structure hyperfine) pour les centres Mn +2 cubiques dans ZnX (X = S, Se, Te) et CdTe, en utilisant les formules de perturbation de ces paramètres pour un amas (cluster) tétraèdre 3d 5 , contenant les contributions du champ du cristal et de transfert de charge. Les coefficients orbitaux moléculaires pertinents sont déterminés uniformément à partir de l'approche en amas et les paramètres calculés du Hamiltonien de spin sont en bon accord avec les valeurs observées. Les déplacements g des facteurs reliés à la valeur de spin pur g s ( = 2,0023) causés par les contributions de transfert de charge sont de signe opposé (positif) et d'amplitude beaucoup plus grande que ceux causés par les contributions du cristal. D'autre part, les contributions à la structure hyperfine provenant du mécanisme de transfert de charge sont de même signe et d'amplitude correspondant à 20-30 % de celles causées par les mécanismes cristallins. L'importance des contributions dues au transfert de charge croît significativement avec la covalence du coefficient du couplage de spin-orbite du ligand, c.-à-d. S 2 < Se 2

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“…The procedure was similar to that of Wang's report. 18 The phase purity of ZnS:Cu,Mn powders were analyzed by means of X-ray diffraction(MSAL-XD2 X-ray diffractometer with Cu K α radiation operated at 36 kV and 20 mA). Fluorescence spectra were measured using a fluorescence spectrophotometer (Hitachi, F-4500) equipped with a 150 W xenon lamp.…”

confidence: 99%

Fluorescence enhancing under UV-NIR simultaneous-excitation in ZnS:Cu,Mn phosphors

et al. 2012

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The fluorescence properties of a long-lasting phosphor, ZnS:Cu,Mn was studied for the first time under simultaneously excitation of both UV and NIR light. Up to 20% fluorescence enhancement of the phosphor was observed. In the present simultaneously-excitation process, broad-band NIR light was absorbed and converted to visible photons via a single-photon upconversion path. We propose that a novel kind of spectral-conversion material with the unique ability to simultaneously convert both UV and NIR photons can be developed and is promising in the application of enhancing the EQE of solar cells.

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Photophysical and photoluminescence properties of co-activated ZnS:Cu,Mn phosphors

Cited by 48 publications

References 28 publications

Rare‐Earth Free Phosphors with Ultra‐Broad Band Emission Application for High Color Rendering Index Lighting Source

Rare‐Earth Free Phosphors with Ultra‐Broad Band Emission Application for High Color Rendering Index Lighting Source

Investigations of the spin Hamiltonian parameters for the cubic Mn²⁺ centers in ZnX (X = S, Se, Te) and CdTe

Fluorescence enhancing under UV-NIR simultaneous-excitation in ZnS:Cu,Mn phosphors

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Photophysical and photoluminescence properties of co-activated ZnS:Cu,Mn phosphors

Cited by 48 publications

References 28 publications

Rare‐Earth Free Phosphors with Ultra‐Broad Band Emission Application for High Color Rendering Index Lighting Source

Rare‐Earth Free Phosphors with Ultra‐Broad Band Emission Application for High Color Rendering Index Lighting Source

Investigations of the spin Hamiltonian parameters for the cubic Mn2+ centers in ZnX (X = S, Se, Te) and CdTe

Fluorescence enhancing under UV-NIR simultaneous-excitation in ZnS:Cu,Mn phosphors

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Investigations of the spin Hamiltonian parameters for the cubic Mn²⁺ centers in ZnX (X = S, Se, Te) and CdTe