Fabrication of glasses of dispersed yellow oxynitride phosphor for white light-emitting diodes

✍ Scribed by Hiroyo Segawa; Satoshi Ogata; Naoto Hirosaki; Satoru Inoue; Tadashi Shimizu; Masataka Tansho; Shinobu Ohki; Kenzo Deguchi

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 673 KB
• Volume: 33
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2010.10.004

✦ Synopsis

Ca-a-SiAlON:Eu 2+ is known to be a typical oxynitride phosphor for luminescent materials. We investigated the potential as white LEDs of various glasses into which Ca-a-SiAlON:Eu 2+ phosphor was dispersed. Borate and tellurite glasses were melted at 1200 °C using a combinatorial melting system. Several glasses, 2R 2 O-50ZnO-48B 2 O 3 (mol%; R = Li, Na, K), 30Na 2 OÀ10ZnOÀ60TeO 2 and 20Na 2 OÀ30Z-nOÀ50TeO 2 , were dispersed homogeneously with SiAlON powders without degradation. The color generated by irradiation of blue LED at 450 nm depended on the concentration of SiAlON and the thickness of the glasses, resulting in nearly white light in some cases.