Luminescence and Energy Transfer of Eu- and Mn-Coactivated CaAl2Si2O8 as a Potential Phosphor for White-Light UVLED

✍ Scribed by Yang, Woan-Jen; Luo, Liyang; Chen, Teng-Ming; Wang, Niann-Shia

• Book ID: 115438433
• Publisher: American Chemical Society
• Year: 2005
• Tongue: English
• Weight: 196 KB
• Volume: 17
• Category: Article
• ISSN: 0897-4756
• DOI: 10.1021/cm050638f

✦ Synopsis

A series of Eu 2+ -and Mn 2+ -coactivated CaAl 2 Si 2 O 8 phosphors have been synthesized at 1400 °C under a reduced atmosphere and their luminescence properties have been investigated as a function of activator and coactivator concentrations. We have discovered that energy transfers from Eu 2+ to Mn 2+ by directly observing significant overlap of the excitation spectrum of Mn 2+ and the emission spectrum of Eu 2+ as well as the systematic relative decline and growth of emission bands of Eu 2+ and Mn 2+ , respectively. The critical distance and average separation of Eu 2+ and Mn 2+ have also been calculated. By utilizing the principle of energy transfer, we have also demonstrated that with appropriate tuning of activator content CaAl 2 Si 2 O 8 :Eu 2+ ,Mn 2+ phosphors exhibit great potential to act as a phosphor for white-light ultraviolet light-emitting diodes (UVLEDs).