The reduction of Eu³⁺ to Eu²⁺ has been realized under air atmosphere in silver borate glasses. By controlling sliver concentration in silver borate glasses, the emission of Eu²⁺ can be tuned from 440nm to 510nm. So, bright and tunable white lights have been achieved in europium single doped silver borate glasses. It is believed that europium single doped silver borate glass is potentially useful as an ultraviolet-convertible phosphor for white-light emitting diodes. Because europium single doped silver borate glass can not only conquer the difficulty in color and lifetime balance of the multi-color phosphors LEDs, but also avoid energy transfer and cross-relaxation between two/three kinds of different rare earths, which may result in quenching fluorescence.

Date Published: 21 July 2010
PDF: 4 pages
Proc. SPIE 7749, 2010 International Conference on Display and Photonics, 77490T (21 July 2010); doi: 10.1117/12.869450

Published in SPIE Proceedings Vol. 7749:
2010 International Conference on Display and Photonics