Crystal Phase Recognition and Photoluminescence Behavior of Deep Reddish-Orange Sm3+-Activated Ca9Gd(VO4)7 Nanocrystals for Modern Solid-State Lightings

A deep reddish-orange-emitting Sm 3+ -activated vanadate-based nanocrystalline material series is developed via the solution combustion procedure. A trigonal crystal framework is formed with space group R3c (161) having unevenly designed particles with extents between 33 nm and 62 nm. Morphological...

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Bibliographic Details
Published in:Journal of electronic materials 2023-04, Vol.52 (4), p.2780-2793
Main Authors: Dalal, Hina, Kumar, Mukesh, Kaushik, Shalini, Sehrawat, Priyanka, Sheoran, Monika, Sehrawat, Neeraj, Malik, R. K.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Chromaticity
Crystal structure
Electronics and Microelectronics
Energy
Energy bands
Energy dispersive X ray analysis
Energy gap
Excitation spectra
Instrumentation
Light emitting diodes
Lighting
Materials Science
Morphology
Nanocrystals
Nitrates
Optical and Electronic Materials
Optoelectronics
Original Research Article
Photoluminescence
Radiation
Radiative lifetime
Solid state
Solid State Physics
X ray analysis
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Summary:A deep reddish-orange-emitting Sm 3+ -activated vanadate-based nanocrystalline material series is developed via the solution combustion procedure. A trigonal crystal framework is formed with space group R3c (161) having unevenly designed particles with extents between 33 nm and 62 nm. Morphological aspects are examined via scanning and transmission electron microscopy (SEM and TEM). The elemental investigation is confirmed through energy-dispersive x-ray analysis (EDAX). On near-UV excitation, the luminescence spectrum presents a fair reddish-orange emission at 606-nm wavelength consistent with the electronic transition 4 G 5/2  →  6 H 7/2 . The energy band gap is inspected via diffuse reflectance measurements. Radiative lifetime, quantum efficacy, and rates of radiation-less transformations were also examined and found to have values as 1.4914 ms, 82.84%, and 115.1 ms −1 for the optimized nanosample, respectively. The CIE coordinates, and hence CCT values, lay in the reddish-orange zone of the chromaticity plot, thus finalizing their potential application in WLEDs, solid-state lighting (SSL), and other advanced optoelectronic applications. Graphical Abstract
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-023-10241-z