Preparation and photoluminescence properties of the Eu2+, Sm3+ co-doped Li2SrSiO4 phosphors

Liu, Lijuan; You, Panli; Yin, Guangfu; Liao, Xiaoming; Huang, Zhongbing; Chen, Xianchun; Yao, Yadong

doi:10.1016/j.cap.2012.01.005

Cited by 18 publications

(8 citation statements)

References 39 publications

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“…However, problems like thermal quenching, poor color rendition and narrow visible range pose serious drawbacks to this system [5]. In recent years the majority of the research has been focused on full color phosphors for the preparation of white LEDs such as Li 2 SrSiO 4 :Eu 2+ , Sm 3+ [6], Ca 2−x Sr x SiO 4 :Eu 2+ [7] and CaMoO4:Tb 3+ [8]. Tm 3+ /Tb 3+ /Mn 3+ tri-doped phosphate glasses containing different Mn 2+ ion concentrations were synthesized to explore new white light emitting material [9].…”

Section: Introductionmentioning

confidence: 99%

Dy3+-doped nano-glass ceramics comprising NaAlSiO4 and NaY9Si6O26 nanocrystals for white light generation

Bagga

Achanta

Goel³

et al. 2013

Materials Science and Engineering: B

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Section: Introductionmentioning

confidence: 99%

Dy3+-doped nano-glass ceramics comprising NaAlSiO4 and NaY9Si6O26 nanocrystals for white light generation

Bagga

Achanta

Goel³

et al. 2013

Materials Science and Engineering: B

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“…Experimental observation shows that dopants and co‐dopants are crucial in improving the performance of LSSO for application in luminescent devices . Information on the role of these dopants and co‐dopants in terms of the sites occupied in the host lattice is therefore very important.…”

Section: Resultsmentioning

confidence: 99%

“…The small difference between the ion sizes of the RE 3+ and Sr 2+ sites causes only a small lattice deformation and consequently a lower solution energy. The preference for a trivalent rare earth dopant by the Sr site has been related in some experimental works . Zhang et al and Liu et al, for example, reported that Ce 3+ and Sm 3+ doping ions preferentially occupy the Sr 2+ sites; however, they did not report the preferred charge compensation defect required in the Ce 3+ and Sm 3+ doping.…”

Section: Resultsmentioning

confidence: 99%

“…The preference for a trivalent rare earth dopant by the Sr site has been related in some experimental works . Zhang et al and Liu et al, for example, reported that Ce 3+ and Sm 3+ doping ions preferentially occupy the Sr 2+ sites; however, they did not report the preferred charge compensation defect required in the Ce 3+ and Sm 3+ doping. Our results also reveal that the lithium vacancy (V Li ́́) compensation is much more energetically favorable than other types of defect compensation.…”

Section: Resultsmentioning

confidence: 99%

“…All other schemes involving substitution at the Li or Si site are unlikely. X‐ray diffraction (XRD) of an LSSO structure doped with different Eu 2+ concentrations in different works has found no traces of other dopant‐containing oxides, indicating that the Eu 2+ dopant enters easily into the LSSO structure.…”

Section: Resultsmentioning

confidence: 99%

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Rare Earth Doping and Co‐Doping in Lithium Strontium Silicate: A Computational Study

Santos

Neto

Santos

et al. 2019

Physica Status Solidi (b)

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Using atomistic simulations based on lattice energy minimization, rare earth doping and co‐doping in Li2SrSiO4 (LSSO) are investigated in terms of energetics. The doping effects are determined by the calculation of atomistic energetics, using potential parameters developed from an empirical potential by fitting. The potential parameters obtained in this way allowed us to reproduce the structural parameters, and the results showed good agreement with the experimental data. The results of these calculations indicate that the Li Frenkel and Li2O Schottky defects are the most favorable intrinsic defects, and also reveal that RE3+ = Ce, Pr, Sm, Eu, Dy, Er and RE2+ = Eu ions are most energetically favorable for incorporation at the Sr site. Charge compensation by VLi′ vacancy defects is the most probable route for RE3+ ion incorporation. The reduction–doping processes (Eu reduction) in a H2 reducing atmosphere were considered, and the effects of co‐doping on Eu reduction were also investigated.

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Luminescence studies of a Li₂Ca_1−xSiO₄:xSm³⁺ phosphor for the generation of white light under NUV‐excited phosphor converting LEDs

Parimala

Rao²,

Suresh³

et al. 2022

Luminescence

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In this paper, we present new aspects of Sm3+‐doped pure Li2CaSiO4 as a suitable candidate for white light emitting diode (WLED) applications. The samples were mainly prepared using a conventional modified solid‐state synthesis technique. The structural studies were done using X‐ray diffraction and Rietveld refinement. Instruments such as a scanning electron microscope (SEM) were used to obtain information about the morphology of the as‐prepared samples. Photoluminescence (PL) analysis of phosphor samples for variable concentrations of doping ions with variable excitations were presented. When doped with Sm3+ in host Li2CaSiO4 it emitted intense blue, green and red emissions and a more intense red emission peak (605 nm) under 408 nm excitation (near‐UV–blue). Our study shows that the as‐prepared phosphor may be useful for optical devices and mainly for WLEDs. The corresponding transitions of doping ions and concentration quenching effect were studied in detail. The 1931 Commission Internationale de l'Eclairage (x, y) chromaticity coordinates showed the distribution of spectral regions calculated from PL emission spectra and this was found (0.63, 0.36) in the red region, so the phosphor may be useful for near‐UV–blue excited WLED applications.

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Preparation and photoluminescence properties of the Eu2+, Sm3+ co-doped Li2SrSiO4 phosphors

Cited by 18 publications

References 39 publications

Dy3+-doped nano-glass ceramics comprising NaAlSiO4 and NaY9Si6O26 nanocrystals for white light generation

Dy3+-doped nano-glass ceramics comprising NaAlSiO4 and NaY9Si6O26 nanocrystals for white light generation

Rare Earth Doping and Co‐Doping in Lithium Strontium Silicate: A Computational Study

Luminescence studies of a Li₂Ca_1−xSiO₄:xSm³⁺ phosphor for the generation of white light under NUV‐excited phosphor converting LEDs

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Preparation and photoluminescence properties of the Eu2+, Sm3+ co-doped Li2SrSiO4 phosphors

Cited by 18 publications

References 39 publications

Dy3+-doped nano-glass ceramics comprising NaAlSiO4 and NaY9Si6O26 nanocrystals for white light generation

Dy3+-doped nano-glass ceramics comprising NaAlSiO4 and NaY9Si6O26 nanocrystals for white light generation

Rare Earth Doping and Co‐Doping in Lithium Strontium Silicate: A Computational Study

Luminescence studies of a Li2Ca1−xSiO4:xSm3+ phosphor for the generation of white light under NUV‐excited phosphor converting LEDs

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Product

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Luminescence studies of a Li₂Ca_1−xSiO₄:xSm³⁺ phosphor for the generation of white light under NUV‐excited phosphor converting LEDs