Journal
RSC ADVANCES
Volume 4, Issue 86, Pages 45786-45790Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra08716j
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Funding
- National Nature Science Foundation of China [11104366]
- Natural Science Foundation Project of Chong Qing [cstc2014jcyjA50018]
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A novel blue-emitting phosphor Gd4.67Si3O13:Bi3+ has been synthesized by a conventional high-temperature solid-state method. X-ray diffraction, and photoluminescence spectra were used to characterize the as-synthesized phosphor. Upon 370 nm excitation, the Gd4.67Si3O13:Bi3+ phosphor exhibits a broad emission band centered at 455 nm. Monitoring the 455 nm emission, the Gd4.67Si3O13:Bi3+ phosphor shows an intense broad absorption band ranging from 200 to 400 nm. The energy transfer mechanism between Bi3+ ions has been discussed, which is demonstrated to be dipole-dipole interaction. The critical concentration is 3 mol% and the critical distance is found to be 25.7 angstrom. The thermal stability and the CIE coordinates are also investigated in this work. The CIE coordinates of the Gd4.67Si3O13:Bi3+ phosphor upon 370 nm excitation are (0.141, 0.096). All the results indicate that the blue-emitting phosphor Gd4.67Si3O13:Bi3+ has potential applications for white LEDs.
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