Synthesis and crystal structural analysis of a green light-emitting Ba5Zn4Y8O21:Er3+ nanophosphor for PC-WLEDs applications

Sheoran, Monika; Sehrawat, Priyanka; Kumar, Mukesh; Kumari, Neelam; Taxak, V.B.; Khatkar, S.P.; Malik, R.K.

doi:10.1007/s10854-021-05787-9

Cited by 12 publications

(3 citation statements)

References 40 publications

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“…Ba 2+ , Y 3+ , Zn 2+ cations are surrounded by ten, seven, and five O 2− ions, respectively, to form prisms. It should be noted that the Ba 2+ ions occupy two sites and form two prisms 21 . These prisms are distributed in a parallel manner along the c ‐axis via edge sharing.…”

Section: Resultsmentioning

confidence: 99%

“…[12][13][14] In recent years, rare earth (RE)-based composite oxides such as Ba 5 Zn 4 RE 8 O 21 , especially Ba 5 Zn 4 Y 8 O 21 and Ba 5 Zn 4 Gd 8 O 21 host materials, have been developed as attractive matrices for exploring UCL, X-ray, and light-emitting diode phosphors. [15][16][17][18][19][20][21] Our previous work revealed that Ba 5 Zn 4 Y 8 O 21 is a very promising host for red UCL. 22 In this study, we systematically explore the UCL and temperature-sensing performance of Er 3+ single-doped and Yb 3+ -Er 3+ codoped Ba 5 Zn 4 Y 8 O 21 phosphors.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, metal composite oxides comprising two or more metal oxides have better stability, corrosion resistance, and heat resistance than unit oxides because of their complex and stable crystal structures 12–14 . In recent years, rare earth (RE)‐based composite oxides such as Ba 5 Zn 4 RE 8 O 21 , especially Ba 5 Zn 4 Y 8 O 21 and Ba 5 Zn 4 Gd 8 O 21 host materials, have been developed as attractive matrices for exploring UCL, X‐ray, and light‐emitting diode phosphors 15–21 . Our previous work revealed that Ba 5 Zn 4 Y 8 O 21 is a very promising host for red UCL 22 …”

Section: Introductionmentioning

confidence: 99%

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Simultaneous modulation of multicolor upconversion emission and thermal‐sensing performance of Ba₅Zn₄Y₈O₂₁ phosphors

Wang,

Liu,

Zhang

et al. 2024

J Am Ceram Soc.

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In this study, we report the modulation of the emission color and optical temperature‐sensing properties of Er3+ in Ba5Zn4Y8O21 crystals. Er3+ single‐doped Ba5Zn4Y8O21 phosphors showed green emission under 980 nm excitation. When codoping with Yb3+ ions, the red emission component from the Er3+ ions increased significantly, and the sample emission turned orange. Yb3+–Er3+ codoped Ba5Zn4Y8O21 samples exhibited bright red emission with a maximum IR/IG value of 89.30 when excited with a longer wavelength, 1550 nm. A broad range of emission colors could be modulated by adjusting the dopant concentration. The possible modulation mechanisms and upconversion processes were analyzed based on the luminescence decay curves and power‐dependent emission intensities. Furthermore, the optical temperature‐sensing properties of Ba5Zn4Y8O21:Er3+ and Ba5Zn4Y8O21:Er3+, Yb3+ phosphors with thermal coupled energy levels (TCELs) and nonthermal coupled energy levels (N‐TCELs) of Er3+ ions were investigated using fluorescence intensity ratio technique. Based on the TCELs (2H11/2/4S3/2), the Er3+ single‐doped and Yb3+–Er3+ codoped Ba5Zn4Y8O21 phosphors present the similar optical thermometry behaviors under 980 and 1550 nm excitation. The highest absolute (Sa) and relative sensitivity (Sr) are 3.95 × 10−3 K−1 at 573 K and 1.31% K−1 at 303 K, respectively. Based on N‐TCELs (4F9/2/2H11/2), the temperature‐sensing performance depends on the Yb3+ dopant and excitation wavelength. The highest values for Sa and Sr reached 5.46 K−1 at 303 K and 1.38% K−1 at 573 K for the Ba5Zn4Y8O21:Er3+, Yb3+ phosphor under 1550 nm excitation, respectively. In addition, the present phosphor exhibited high stability and repeatability over a wide temperature range. These results indicate that the multicolor modulation upconversion Ba5Zn4Y8O21‐based phosphor can be considered a potential reusable optical thermometer for noncontact temperature detection.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simultaneous modulation of multicolor upconversion emission and thermal‐sensing performance of Ba₅Zn₄Y₈O₂₁ phosphors

Wang,

Liu,

Zhang

et al. 2024

J Am Ceram Soc.

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Optical, crystallographic and Judd–Ofelt analysis of europium doped Sr6Y2Al4O15 nanocrystals for NUV-WLED fabrication

Dalal

Sehrawat

Sheoran

et al. 2021

J Mater Sci: Mater Electron

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A very convenient and energy-saving route named Solution-Combustion Synthesis had been adopted to prepare a sequence of Sr 6 Y 2 Al 4 O 15 :Eu 3? (1.0-5.0 mol%) nanophosphorshaving an excellent luminescence which is very requisite in the solid-state illumination sector. The monoclinic phase and the crystallinity of the prepared samples were confirmed by Powder X-Ray Diffraction and the Rietveld refinement technique. Non-uniformity and somewhat agglomeration of particles having a size between 32 nm and 62 nm, were observed during morphological probes via Scanning and Transmission Electron Microscopies. The red-light emission was due to electronic transition from 5 D 0 ? 7 F 2 states which is purely electric-dipole allowed transition. Dexter's approach as well as Inokuti-Hirayama model,were cast-off to look into photoluminescent properties. Both these models confirmed the multipolar interactions as the main cause for concentration quenching after 3.0 mol% of Europium(III) content. Various other radiative properties such as decay-time, quantum efficiency, non-radiative relaxation rates were also determined. Red light parameters like Color Coordinate Temperature and Commission International de I'Eclairage color coordinates were also evaluated which confirmed the potential candidature of the prepared nanophosphors for the most recent version of wLEDs, lasers, sensors, advanced solar cells, etc.

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Structural and Optoelectronic Analysis of Ba5Zn4Gd8O21: Er3+ Nanomaterials Emitting Green Light for Modern Lighting Applications

Sheoran

Sehrawat

Kumari

et al. 2021

J. Electron. Mater.

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Synthesis and crystal structural analysis of a green light-emitting Ba5Zn4Y8O21:Er3+ nanophosphor for PC-WLEDs applications

Cited by 12 publications

References 40 publications

Simultaneous modulation of multicolor upconversion emission and thermal‐sensing performance of Ba₅Zn₄Y₈O₂₁ phosphors

Simultaneous modulation of multicolor upconversion emission and thermal‐sensing performance of Ba₅Zn₄Y₈O₂₁ phosphors

Optical, crystallographic and Judd–Ofelt analysis of europium doped Sr6Y2Al4O15 nanocrystals for NUV-WLED fabrication

Structural and Optoelectronic Analysis of Ba5Zn4Gd8O21: Er3+ Nanomaterials Emitting Green Light for Modern Lighting Applications

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Synthesis and crystal structural analysis of a green light-emitting Ba5Zn4Y8O21:Er3+ nanophosphor for PC-WLEDs applications

Cited by 12 publications

References 40 publications

Simultaneous modulation of multicolor upconversion emission and thermal‐sensing performance of Ba5Zn4Y8O21 phosphors

Simultaneous modulation of multicolor upconversion emission and thermal‐sensing performance of Ba5Zn4Y8O21 phosphors

Optical, crystallographic and Judd–Ofelt analysis of europium doped Sr6Y2Al4O15 nanocrystals for NUV-WLED fabrication

Structural and Optoelectronic Analysis of Ba5Zn4Gd8O21: Er3+ Nanomaterials Emitting Green Light for Modern Lighting Applications

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Simultaneous modulation of multicolor upconversion emission and thermal‐sensing performance of Ba₅Zn₄Y₈O₂₁ phosphors

Simultaneous modulation of multicolor upconversion emission and thermal‐sensing performance of Ba₅Zn₄Y₈O₂₁ phosphors