Investigation of the effect of host composition on the photoluminescent properties of SrxBa1−xS doped with Eu and Sm

Brower, Daniel T.; Lloyd, Isabel K.

doi:10.1557/jmr.1995.0211

Cited by 9 publications

(5 citation statements)

References 3 publications

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“…The peak emission of SrS:Eu (620 nm) is indeed blue-shifted compared to CaS:Eu (655 nm) [152]. Although the emission of BaS:Eu was reported at 572 nm [146], this observation could not be confirmed later on [152,153]. BaS:Eu shows a broad emission band, peaking at about 878 nm, with a much longer lifetime than expected for Eu 2+ .…”

Section: Color Conversion Phosphorsmentioning

confidence: 99%

Luminescence in Sulfides: A Rich History and a Bright Future

et al. 2010

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Sulfide-based luminescent materials have attracted a lot of attention for a wide range of photo-, cathodo- and electroluminescent applications. Upon doping with Ce3+ and Eu2+, the luminescence can be varied over the entire visible region by appropriately choosing the composition of the sulfide host. Main application areas are flat panel displays based on thin film electroluminescence, field emission displays and ZnS-based powder electroluminescence for backlights. For these applications, special attention is given to BaAl2S4:Eu, ZnS:Mn and ZnS:Cu. Recently, sulfide materials have regained interest due to their ability (in contrast to oxide materials) to provide a broad band, Eu2+-based red emission for use as a color conversion material in white-light emitting diodes (LEDs). The potential application of rare-earth doped binary alkaline-earth sulfides, like CaS and SrS, thiogallates, thioaluminates and thiosilicates as conversion phosphors is discussed. Finally, this review concludes with the size-dependent luminescence in intrinsic colloidal quantum dots like PbS and CdS, and with the luminescence in doped nanoparticles.

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Section: Color Conversion Phosphorsmentioning

confidence: 99%

Luminescence in Sulfides: A Rich History and a Bright Future

et al. 2010

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“…This suggests that the holes are trapped by Sm 3+ ions or in the vicinity of the Sm 3+ sites. There are many authors [2][3][4][5][6][7][8] who believed that the Sm 3+ ions in alkaline earth sulphides act as electron traps and become Sm 2+ after trapping electrons. Usually the positively and negatively charged centres are responsible for the electron and hole traps respectively.…”

Section: The Infrared Absorption Band Of the Trapped Electronsmentioning

confidence: 99%

“…The x-ray storage phosphor BaFBr:Eu 2+ [1], for example, is currently used for x-ray imaging. Another type of this class of phosphors is the rare-earth doubly doped alkaline earth sulphides, such as CaS:Eu,Sm [2,3], SrS:Eu,Sm [4][5][6], CaS:Ce,Sm [7] and MgS:Ce,Sm [8]. They were conventionally used as infrared sensors [9] and expected to be developed as an erasable and rewritable optical memory medium [10].…”

Section: Introductionmentioning

confidence: 99%

“…Most investigators used to study the detrapping process via the stimulation spectra [1,2,[5][6][7][8][9], viz., the dependence of the stimulated luminescence intensity on the wavelength of the stimulating light. Apart from the influence by exhaustion of the stored energy in stimulation, the measurements of the stimulation spectra have to be performed on the samples with high radiative efficiency of the recombination and get rid of the region around the monitored wavelength of the luminescence.…”

Section: Introductionmentioning

confidence: 99%

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Optical absorption studies on the trapping states of CaS:Eu,Sm

He¹,

Wang²,

Sun³

et al. 2001

J. Phys.: Condens. Matter

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The optical absorption spectra of CaS:Eu,Sm at several concentrations of Eu (from 0 to 0.05 mol%) were examined to clarify the electron trapping mechanism for its photo-stimulated luminescence. Corresponding to the electron and hole trapping states, the difference between the absorption spectra after and before excitation was observed. The substructure of the infrared band of the absorption difference is eclipsed by the 4f-4f absorption of Sm3+ ions in accordance with the photo-stimulation spectrum. In comparison of Sm3+ with La3+ in Eu co-doped CaS, it was inferred that the Sm3+ ions are responsible for the storability of the traps instead of the direct capture of electrons as the previous investigators thought. Our results demonstrate that the Sm3+ ions induce defects in their neighbourhood which act as the trapping centres but the Sm3+ ions do not form Sm2+ ions by trapping electrons.

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“…5 " 7 Stimulable photoluminescent thin films are being investigated for use as erasable information storage media. 8 ' 9 Materials of interest include SrS and BaF 2 . Determination of thickness is important for thin film process development.…”

Section: Introductionmentioning

confidence: 99%

A study of X-ray reflectivity data analysis methods for thin film thickness determination

Brower¹,

Revay²,

Huang

1996

Powder Diffr.

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The determination of thin film thickness by four X-ray reflectivity methods (namely, the peak separation, the Fourier transform, the modified Bragg equation, and the curve-fitting methods) has been studied. An analysis of SrS and BaF2 thin films showed thickness values determined by the methods agreed to within 4%. The curve-fitting method had the highest accuracy but was time-consuming. The peak separation, the Fourier transform, and the modified Bragg equation methods are considerably faster and, on average, gave 2.8%, 0.9%, and 0.2% larger thicknesses than those of the curve-fitting method.

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Investigation of the effect of host composition on the photoluminescent properties of Sr_xBa_1−xS doped with Eu and Sm

Cited by 9 publications

References 3 publications

Luminescence in Sulfides: A Rich History and a Bright Future

Luminescence in Sulfides: A Rich History and a Bright Future

Optical absorption studies on the trapping states of CaS:Eu,Sm

A study of X-ray reflectivity data analysis methods for thin film thickness determination

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