Luminescence Properties Of Rare Earth Sm3+ and Tb3+ Doped Ca3Al2O6 Phosphor For Solid State Lighting

Publication date: 2019Source: Materials Today: Proceedings, Volume 15, Part 3Author(s): A.N. Yerpude, G.N.Nikhare, S.J. Dhoble, N.S.KokodeAbstractThe luminescence properties of Ca3Al2O6 doped with rare earth Sm3+ and Tb3+ prepared by self propagating combustion synthesis has been reported. The powdered X-ray diffraction study indicates the formation of desired phase of the sample. The photoluminescence study of Ca3Al2O6:Sm3+ reveals the orange – red emission at 567 nm and 603 nm monitored at 407 nm excitation wavelength, attributed to 4G5/2 →6H5/2, 6H7/2 transition of rare earth Sm3+. The Ca3Al2O6:Tb3+ phosphor gives characteristics emission corresponding to wavelength 419nm, 440 nm, 489nm and 545 nm wavelength when excited by wavelength of 379 nm in the UV region of electromagnetic spectrum. These emission wavelengths are characteristics of 5d →4f transition of rare earth Tb3+ namely 5D3 →7F5, 7F4 and 5D4 →7F6, 7F5. The results indicate that the Sm3+ and Tb3+ activated Ca3Al2O6 phosphor has promising applications in the field of ecofriendly solid state lighting.

Source: Materials Today: Proceedings - June 14, 2019 Category: Materials Science Source Type: research