Synthesis and PL study of UV emitting phosphor KCa4(BO3)3:Pb2

• Published in: Journal of luminescence Vol. 149; pp. 200 - 203
• Main Authors: Gawande, A.B., Sonekar, R.P., Omanwar, S.K.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.05.2014; Elsevier
• Subjects: Combustion synthesis; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Inorganic borate; Materials science; Materials synthesis; materials processing; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Photoluminescence; Physics; UV emitter; Combustion synthesis; Inorganic borate; UV emitter; Photoluminescence; Scanning electron microscopy; Stokes shift; Fourier transform spectroscopy; Doping; XRD; Infrared spectra; Ultraviolet radiation; Phosphors; Excitation; Microstructure; Borates
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2014.01.044

Pb2+ doped KCa4(BO3)3 materials were prepared by a novel solution combustion synthesis technique which is slight variation of combustion synthesis method. The synthesized materials were characterized by powder XRD and FT-IR. Scanning Electron Microscopy (SEM) observation indicated that the microstructure of the phosphor consisted of irregular grains which get finer and shaped in doped sample as compared to pure. The photoluminescence properties of synthesized materials were investigated using Spectrofluorometer at room temperature. The emission and excitation bands of the synthesized phosphors were observed at 335nm and 260nm respectively. The concentration of Pb2+ for which optimum emission is obtained was found to be 0.005mol. The critical transfer distance (R0) for optimum concentration was determined to be 16.88Å. The Stokes shift of KCa4(BO3)3:Pb2+ was measured to be 8756cm−1. The phosphor could find application in medical and lamp industry. •Inorganic borate phosphor KCa4(BO3)3:Pb2+ has been synthesized by solution combustion synthesis technique.•Structure confirmation of synthesized phosphor done by using powder XRD & FT-IR.•Doping effect on the surface morphology of synthesized material is shown by SEM images.•Stokes shift, optimum concentration and critical transfer distance for optimum concentration in KCa4(BO3)3:Pb2+ have been determined.