Luminescence properties of red emitting phosphor NaSrBO3:Eu3+ prepared with novel combustion synthesis method

• Published in: Journal of luminescence 2013-10, Vol.142, p.180-183
• Main Authors: Chikte (Awade), Devayani, Omanwar, S.K., Moharil, S.V.
• Format: Article
• Language: English
• Subjects: Combustion synthesis; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Phosphor; Photoluminescence; Physics; Red emission
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2013.03.045

The red emitting phosphor NaSrBO3:Eu3+is synthesised by simple, time saving, economically modified method of solution combustion synthesis at comparatively lower temperature using urea as fuel. X-ray power diffraction (XRD) analysis confirmed the formation of the said phosphor. Photoluminescence measurements showed that the phosphor exhibited emission peak with good intensity at −614nm, corresponding to 5D0–7F2 (614nm) red emission andweak 5D0–7F1 (593nm) orange emission. The excitation spectra monitored at 614nm show broad band from 250 to 350nm ascribed to O–Eu charge-transfer (CTB) transition and the other peaks in the range of 350–410nm originated from f–f transitions of Eu3+ ions. The strongest band at 394nm can be assigned to 7F0–5L6 transition of Eu3+ ions due to the typical f–f transitions within Eu3+ of 4f6 configuration. The latter lies in near ultraviolet (350–410nm) emission of UV LED. For the excitation wavelength of 394nm the emission intensity increases initially with the increase of Eu3+ concentration and reaches to the maximum at x=0.09.The concentration quenching observed after that is mainly due to quadrupole–quadrupole interaction. The as synthesised phosphor NaSrBO3:Eu3+by this method shows CIE colour coordinates of (0.62,0.34) with good intensity. •Phosphor NaSrBO3:Eu3+ prepared by modified solution combustion synthesis.•Method is simple, time saving, economical, easy to handle and requires no absolute control on the temperature.•Intense red emission is observed.•PL for various excitations recorded.