Excellent photoluminescence and cathodoluminescence properties in Eu3+-activated Sr2LaNbO6 materials for multifunctional applications

Hua, Yongbin; Ran, Weiguang; Yu, Jae Su

doi:10.1016/j.cej.2020.127154

Cited by 121 publications

(38 citation statements)

References 81 publications

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“…The ΔE values of the CYS:0.1Eu 3+ , CGS:0.1Eu 3+ , CLS:0.1Eu 3+ , CYN:0.1Eu 3+ , CGN:0.1Eu 3+ , and CLN:0.1Eu 3+ phosphors were estimated to be about 0.210, 0.230, 0.223, 0.372, 0.282, and 0.244 eV under high fitting degrees ( R 2 ), as listed in Table . It also can be proved that comparing the ΔE values only is not sufficient to evaluate the thermal stability of phosphors on the basis of recent reports, such as Mg 3 Y 2 Ge 3 O 12 :Bi 3+ /Eu 3+ (94.42% at 423 K, 0.34 eV), NaKLaNbO 5 :Eu 3+ (86% at 423 K, 0.195 eV), LiLaMgWO 6 :Eu 3+ (91% at 423 K, 0.18 eV), and Li 5 La 3 Ti 2 O 12 :Eu 3+ (75% at 423 K, 0.42 eV). − …”

Section: Resultsmentioning

confidence: 78%

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Hua

2021

ACS Sustainable Chem. Eng.

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At present, rare-earth-activated perovskite-type materials have attracted lots of interest from researchers owing to their excellent advantages of unique electron properties and stable structure. This present work was designed to synthesize, investigate, and compare the photoluminescence properties in europium(III) (Eu 3+ )-activated Ca 2 BB′O 6 (B = Y, Gd, and La; B′ = Sb and Nb) double-perovskite (A 2 BB′O 6 ) luminescent materials. The doped Eu 3+ ions substitute the B sites of Y 3+ , Gd 3+ , and La 3+ ions, which are distributed to the equilibrium valence state and exhibit little difference in ion radius among them. All the resultant samples have a monoclinic structure, and the B sites strongly affect the space group in double-perovskite Ca 2 BB′O 6 frameworks. Additionally, the emission intensity, thermal stability, decay curve, color purity, quantum yield (QY), etc. were determined. The Ca 2 BNbO 6 :Eu 3+ (B = Y, Gd, and La) frameworks have good QYs (>42%), which are promising for white-light-emitting diodes (WLEDs). Besides, the red-emitting Ca 2 BB′O 6 :Eu 3+ − polydimethylsiloxane (PDMS) and white-emitting CYN0.1Eu 3+ −commercial phosphors (CP)−PDMS films were fabricated. Eventually, the packaged WLEDs based on the Ca 2 BNbO 6 :Eu 3+ (B = Y, Gd, and La) powders and a novel white-emitting structure based on the CYN:0.1Eu 3+ −CP−PDMS film were confirmed to have suitable color rendering index and correlated color temperature values for indoor illumination.

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Section: Resultsmentioning

confidence: 78%

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Hua

2021

ACS Sustainable Chem. Eng.

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“…The intensity parameters of the optimal sample LiYO 2 :020Eu 3+ could be estimated by the following expression. 16,[32][33][34] (5)…”

Section: Resultsmentioning

confidence: 99%

“…Recently, there have been some reports that Eu 3+ excitation has an abnormally weak charge transfer band, such as Sr 2 LaNbO 6 :Eu 3+ , Cs 3 GdGe 3 O 9 :Eu 3+ , LaSc 3 (BO 3 ) 4 :Eu 3+ , Ca 2 Ga 2 SiO 7 :Eu 3+ , and Ca 19 Mg 2 (PO 4 ) 14 :Eu 3+ , etc. [16][17][18][19][20] Hence, a suitable host may lead to a stronger intra-4f transition absorption that matches well with the emission of n-UV or blue LED chips.…”

Section: Introductionmentioning

confidence: 83%

Strong and pure red-emitting Eu³⁺-doped phosphor with excellent thermal stability for warm WLEDs

Zhang

et al. 2022

Mater. Adv.

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“…The fabrication process of WLED devices was the same as the previous technique 30 . The DFT calculations of the Ca 2 Sb 2 O 7 and Ca 2 Sb 2 O 7 materials were presented by the reported method 31‐33 …”

Section: Methodsmentioning

confidence: 99%

“…30 The DFT calculations of the Ca 2 Sb 2 O 7 and Ca 2 Sb 2 O 7 materials were presented by the reported method. [31][32][33]…”

Section: Introductionmentioning

confidence: 99%

Effects of activated Sr ²⁺ ion content on strong blue‐emitting Ca ₂ Sb ₂ O ₇ materials for high‐quality WLED devices

Hua

Dang

Wang

et al. 2022

Intl J of Energy Research

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Summary In this report, the luminescent performances of the self‐host blue‐emitting Ca2Sb2O7 materials were investigated in terms of the sintering temperature and the dopant Sr2+ ion content. The emission intensity was enhanced with an increase of the sintering temperature as well as the lattice parameters. After doping the Sr2+ ions (>1.2 mol%), the emission spectra of Ca2Sb2O7 materials would be redshifted. The blue‐emitting color (Ca2Sb2O7) turned into greenish‐blue (Sr2+@1.6 mol%) and green (Sr2+@2 mol%) colors in sequence. In light of these interesting findings, the crystal structure, elemental composition, morphology, thermal stability, luminescent dynamics, luminescent efficiency, etc were investigated and compared. Finally, the mini‐white lighting‐emitting diodes (WLEDs) based on the blue‐emitting Ca2Sb2O7, greenish‐blue‐emitting Ca0.4Sr1.6Sb2O7, and green‐emitting Sr2Sb2O7 phosphors were fabricated by mixing commercial phosphors (CP). Especially, the Ca2Sb2O7‐CP‐WLED and Sr2Sb2O7‐CP‐WLED devices exhibited a warm white light with good correlated color temperature (<3200 K) and excellent color‐rendering index (>88). All the above results suggested that the self‐host emitting materials of Sr2+ activated Ca2Sb2O7 with color‐tunable properties could be very promising for solid‐state lighting applications.

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Excellent photoluminescence and cathodoluminescence properties in Eu3+-activated Sr2LaNbO6 materials for multifunctional applications

Cited by 121 publications

References 81 publications

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Strong and pure red-emitting Eu³⁺-doped phosphor with excellent thermal stability for warm WLEDs

Effects of activated Sr ²⁺ ion content on strong blue‐emitting Ca ₂ Sb ₂ O ₇ materials for high‐quality WLED devices

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Excellent photoluminescence and cathodoluminescence properties in Eu3+-activated Sr2LaNbO6 materials for multifunctional applications

Cited by 121 publications

References 81 publications

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca2BB′O6 (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca2BB′O6 (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Strong and pure red-emitting Eu3+-doped phosphor with excellent thermal stability for warm WLEDs

Effects of activated Sr 2+ ion content on strong blue‐emitting Ca 2 Sb 2 O 7 materials for high‐quality WLED devices

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Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Strong and pure red-emitting Eu³⁺-doped phosphor with excellent thermal stability for warm WLEDs

Effects of activated Sr ²⁺ ion content on strong blue‐emitting Ca ₂ Sb ₂ O ₇ materials for high‐quality WLED devices