Phase identification and photophysical characteristics of vanadate-based nanophosphors for lighting and latent fingerprinting applications

• Published in: Inorganic chemistry communications Vol. 168; p. 112885
• Main Authors: Devi, Poonam, Dalal, Hina, Sehrawat, Neeraj, Solanki, Diksha, Kumar Malik, Rajesh
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2024
• Subjects: Band gap; Color coordinates; Lighting applications; Monoclinic; Monoclinic; Band gap; Color coordinates; Lighting applications
• ISSN: 1387-7003
• DOI: 10.1016/j.inoche.2024.112885

[Display omitted] •Green light-emitting Ba2BiV3O11:Er3+ nanophosphors were synthesized via a solution combustion method.•The Rietveld Refinement technique explains crystal structure along with phase purity.•The detailed structural and photophysical analysis is done effectively.•Dexter’s theory was utilized to examine the concentration quenching mechanism.•Significant application in various lighting devices, wLEDs, and latent fingerprinting applications. Monoclinic structure-based Er3+-activated Ba2BiV3O11 nanophosphors have been developed via an easy and cost-efficacious urea-aided solution combustion (SC) procedure. Various spectroscopic and structural investigations thoroughly examine the produced powders. The crystal structure has been resolved by employing a combination of X-ray diffraction (XRD) and the Rietveld refinement practice. The developed powdered nanosamples are crystallized in a monoclinic crystal system with P21/a space group. Further, to evaluate the composition of elements and their relative distribution, energy dispersive X-ray (EDAX) analysis was performed. The band gap values for the host matrix and the optimal nanophosphors were measured using a DR spectrophotometer; the obtained values were 3.47 eV and 3.40 eV, respectively. The strongest excitation peak at 381 nm is closely-matched with the characteristic wavelength of commercialized near ultraviolet (NUV) based LEDs. The characteristic emission spectra of Ba2Bi1-xErxV3O11 (x = 0.01–0.1) phosphors show the strongest emission at 553 nm (4S3/2 → 4I15/2). Additionally, photometric parameters such as quantum efficiency (86 %), color coordinates (x = 0.2568 and y = 0.4551), and correlated color temperature (CCT = 7722 K) are obtained from PL data and are strongly advised for use in wLEDs, color displays, imaging, lighting, and latent fingerprint applications.