Influence of Eu3+ doping on crystallographic and photophysical aspects of combustion synthesized BaSrY4O8 nanophosphor for photoelectronic appliances
Source abstract
Abstract
Europium-activated barium–strontium yttrate nanocrystals having different concentrations were fabricated by an energy-efficient urea-fueled solution combustion approach with sintering at 1100 °C for 3 h. Orthorhombic crystal structure with space group Pnma was confirmed by the Rietveld refinement technique based on X-ray diffraction analysis. Crystallite size dispersion and morphological features were examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. Energy-dispersive system provided a clue about elemental composition in the prepared host lattice. Energy-gap analysis was carried out by using Kubelka–Munk theory with diffuse reflectance spectra. Photoluminescence investigations revealed a bright red emission at 612 nm in the visible region on excitation by a NUV light source. The red color was a result of the 5D0 → 7F2 electronic transition. The concentration quenching mechanism in the prepared nanophosphor was studied with the help of Dexter’s theory as well as I–H model generalization, where multipolar interactions were found to be responsible for the same. Quantum efficiency and non-radiative rates were also calculated using Auzel Model and found to be 83% and 110.6 s−1, respectively, for the optimal sample. Finally, the correlated color temperature and Commission International de I’eclairage coordinates were found to resemble with red coordinates of RGB-based WLEDs.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Solid-state spectroscopy and crystallography · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (49)
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