Effects of the Sr/Si Ratio on the Photoluminescence Properties of Sr3SiO5:Eu2+ Nanophosphors

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Abstract:

Sr3SiO5:Eu2+ nanophosphors for white LEDs were synthesized by solgel method. The crystalline phases were examined with X-ray diffraction (XRD). Luminescence properties were studied, and effects of the Sr/Si ratio on the emission spectra were also studied. The nanophosphor showed a broad excitation band from 300 to 500 nm and a broad band emission peaking at 593 nm due to the typical electron transition of Eu2+ 4f74f65d1. Remarkable enhancement in luminescence characteristics was observed when excesses silica was used. This phenomenon may be attributed to the improvement of Si sensitized the luminescence of Eu2+ in the Sr3SiO5 nanophosphor.

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225-228

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July 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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