The low temperature synthesis of Eu2+and Dy3+ activated Sr3Al2O6 nanophosphors by microwave method

✍ Scribed by Ping Zhang; Li Lingxia; Tian Yuming

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 274 KB
• Volume: 404
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2009.08.068

✦ Synopsis

The Eu 2+ and Dy 3+ activated Sr 3 Al 2 O 6 (S3A2O-ED) nanophosphors were synthesized by a new microwave method. The S3A2O-ED sample calcined in microwave oven at around 650 1C for 20 min possesses a cubic Sr 3 Al 2 O 6 single phase. The sample showed small size (80-100 nm) and spherical shape. The excitation and emission spectra indicated that excitation broad band chiefly sited in visible range and the nanophosphors emitted strong light at 611 nm under around 473 nm excitation. Comparing with conventional method, the microwave synthesis of S3A2O-ED greatly decreased the calcining temperature and time. However, the brightness of S3A2O-ED nanophosphors was reduced. The change of luminescent intensity in S3A2O-ED nanophosphors could be attributed to the effect of surface energy.