Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5459395 | Journal of Alloys and Compounds | 2017 | 17 Pages |
Abstract
Spectrum deficiency in red component of YAG: Ce3+ phosphor is hopeful to be made up by small amount of Si4+-N3â replacing Al3+-O2â for high quality lighting, while the important indicators of emission efficiency and thermal quenching properties dramatically decrease in this approach. Thus micro-structural tuning by cation substitution usually is an effective way to improve the luminescence properties. This study focuses on the structural variations and tuning luminescence induced by La3+ incorporating into Y3(Al,Si)5(O,N)12: Ce3+ phosphors. The results show that the emission efficiency and thermal quenching properties are remarkably enhanced, while the spectrum shows blue-shift to some extent. The mechanism of property variation is clarified, which is ascribed to selective coordination of N3â. This effect is important and possible to be extended to other N3â contained garnet phosphors, becoming an important rule for materials design. The obtained phosphors are promising to develop into practicable phosphors for high color rendition w-LEDs.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Jiyou Zhong, Weiren Zhao, Weidong Zhuang, Fu Du, Yunan Zhou, Yanlin Yu, Ligen Wang,