Abstract
The novel Eu2+-activated SrZn2Si2O7 phosphors were successfully prepared via the wet chemical method. Obtained phosphor is efficiently excited in the wavelength range of 340-400 nm which matches to a near UV (NUV) emitting InGaN chip and emits strong band blue light peaking at 481 nm due to 4f65d1(2D)→4f7(8S7/2) transition of Eu2+ ions which acts as luminescence centers. The effect of the activator concentration and excess silicon on the optical properties was evaluated by luminescence spectroscopy. It was found that when the Eu2+ content and the Si concentration were 0.04 and 1.3, respectively, the optimum phosphor can be achieved. Eventually, the crystallite size of the products was estimated about 30 nm by using XRD and TEM results.
© 2011 AOS
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