Photoluminescent behavior of SrB4O7:RE2+ (RE=Sm and Eu) prepared by Pechini, combustion and ceramic methods

Stefani, Roberval; Maia, Alessandra de Souza; Teotonio, Ercules E.S.; Monteiro, Marcela; Felinto, M.C.F.C.; Brito, Hermi F.

doi:10.1016/j.jssc.2006.01.006

Cited by 70 publications

(38 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1a (RE = Y, La, Gd) particles calcined at 1000 • C, respectively. Take GdAl 3 (BO 3 ) 4 :Dy 3+ as representative, it should be mentioned here that both GdAl 3 (BO 3 ) 4 and GdBO 3 phases have been observed. The XRD pattern shown in Fig.…”

Section: Resultsmentioning

confidence: 98%

“…[1][2][3][4][5]. Within lanthanides, dysprosium ion with 4f 9 configuration has complicated f-block energy levels, therefore various possible transitions between these levels are highly selective, and show sharp line spectra [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we put forward a modified in situ sol-gel technique with assembly of hybrid precursors, and firstly achieved the synthesis of novel REAl 3 (BO 3 ) 4 template, tri-n-butyl borate as both source components for BO 3 3− and hydrolysis polycondensation component. Through certain process, multicomponent hybrid polymeric precursors were constructed to afford the REAl 3 (BO 3 ) 4 :Dy 3+ (RE = Y, La, Gd) after sintering at 1000 • C. All of which are for good optical performance in application.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photoluminescent properties of Dy3+-activated REAl3(BO3)4 (RE=Y, La, Gd) polycrystalline phosphors from hybrid precursors

Yan

Wang

2008

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photoluminescent properties of Dy3+-activated REAl3(BO3)4 (RE=Y, La, Gd) polycrystalline phosphors from hybrid precursors

Yan

Wang

2008

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…Sr 2.41 F 2.59 B 20.03 O 74.8 :Eu 0.12 ,Sm 0.048 (SrSm), which is a Eusensitized, red-emitting, and high efficiency phosphor, has been employed widely in both high-pressure and low-pressure discharge lamps due to its excellent thermal and chemical stability [13][14][15][16][17][18]. However, up to now, there have been very few studies that apply SrSm to improve the CRI of WLEDs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Red-emitting Sr_2.41F_2.59B_20.03O_74.8:Eu_0.12,Sm_0.048 Phosphor on Color Rendering Index and Luminous Efficacy of White LEDs

Nguyen¹,

Nguyen²,

Lee

2017

Current Optics and Photonics

View full text Add to dashboard Cite

Color rendering index (CRI) and luminous efficacy (LE) are two key performance factors of white LEDs (WLED). While most recent works in optics focus on methodology to improve these factors, little attention has been dedicated to chemical composition of materials. This paper studies the effect of Sr2.41F2.59B20.03 O74.8:Eu0.12,Sm0.048 phosphor (SrSm), in terms of concentration and particle size on CRI and LE of 8500 K -WLEDs. Importantly, the molar mass of the componential ions in SrSm are calculated to shed light on the connection between the chemical composition of the material of interest and the performance of WLEDs. Results show that CRI can be improved to a value of around 86 by boosting red-light components in WLEDs, for all 3 major configurations: conformal, in-cup, and remote phosphor. CRI value tends to decrease with larger size of particles, while LE value goes in the reverse direction. On the other hand, both CRI and LE appear to be reduced at higher concentration of SrSm. This light attenuation is analyzed by using the Lambert-Beer law and Mie-scattering theory.

show abstract

“…The Eu 3? ion, which is intrinsically stable under ambient conditions, exhibits the line emission features due to the forbidden f-f transitions (located from 550-750 nm), while divalent europium ion, which is sensitive to oxygen and therefore unstable in air, shows narrow-band and broadband emissions due to its f-f and f-d transitions [20][21][22][23]. Since divalent Eu 2?…”

Section: Introductionmentioning

confidence: 99%

A Nanostructure Phosphor: Effect of Process Parameters on the Photoluminescence Properties for Near-UV WLED Applications

Sameie

Salimi

Alvani

et al. 2011

J Inorg Organomet Polym

View full text Add to dashboard Cite

The sol-gel preparative method was employed to synthesize SrZn 2 Si 2 O 7 :Eu nanostructure phosphors for white-light emitting diodes. The effects of calcination temperature and atmosphere as two important process parameters on the structural, morphological and optical properties were investigated using comprehensive characterization methods such as X-ray diffraction, scanning and transmission electron microscopy (SEM and TEM) and photoluminescence spectra. The obtained phosphors are efficiently excited from 340 to 400 nm, which matches the near UV emitting InGaN chip and emits strong band peaking at 481 nm due to 4f 6 5d 1 ( 2 D) ? 4f 7 ( 8 S 7/2 ) transition of Eu 2? ions. In this europium-doped host lattice, a partial reduction of Eu 3? to Eu 2? at high temperature during the synthesis in air according to the charge compensation model is perceived. Furthermore, for this sample forbidden f-f transitions of Eu 3? are observed. Finally, using Scherrer's equation the crystallite size of the optimum products with color coordination of x = 0.176, y = 0.193 is estimated at *30 nm, which was consistent with TEM observations.

show abstract

Photoluminescent behavior of SrB4O7:RE2+ (RE=Sm and Eu) prepared by Pechini, combustion and ceramic methods

Cited by 70 publications

References 22 publications

Photoluminescent properties of Dy3+-activated REAl3(BO3)4 (RE=Y, La, Gd) polycrystalline phosphors from hybrid precursors

Photoluminescent properties of Dy3+-activated REAl3(BO3)4 (RE=Y, La, Gd) polycrystalline phosphors from hybrid precursors

Effect of Red-emitting Sr_2.41F_2.59B_20.03O_74.8:Eu_0.12,Sm_0.048 Phosphor on Color Rendering Index and Luminous Efficacy of White LEDs

A Nanostructure Phosphor: Effect of Process Parameters on the Photoluminescence Properties for Near-UV WLED Applications

Contact Info

Product

Resources

About

Photoluminescent behavior of SrB4O7:RE2+ (RE=Sm and Eu) prepared by Pechini, combustion and ceramic methods

Cited by 70 publications

References 22 publications

Photoluminescent properties of Dy3+-activated REAl3(BO3)4 (RE=Y, La, Gd) polycrystalline phosphors from hybrid precursors

Photoluminescent properties of Dy3+-activated REAl3(BO3)4 (RE=Y, La, Gd) polycrystalline phosphors from hybrid precursors

Effect of Red-emitting Sr2.41F2.59B20.03O74.8:Eu0.12,Sm0.048 Phosphor on Color Rendering Index and Luminous Efficacy of White LEDs

A Nanostructure Phosphor: Effect of Process Parameters on the Photoluminescence Properties for Near-UV WLED Applications

Contact Info

Product

Resources

About

Effect of Red-emitting Sr_2.41F_2.59B_20.03O_74.8:Eu_0.12,Sm_0.048 Phosphor on Color Rendering Index and Luminous Efficacy of White LEDs