Ce3+- Doped Yttrium Aluminum Garnet Glass-Ceramic Phosphors

• Main Authors: Cheng-En Yeh, 葉承恩
• Other Authors: Jiin-Jyh Shyu
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/zsgs8c

碩士 === 大同大學 === 材料工程學系(所) === 102 === Yttrium aluminum garnet (Y3Al5O12, YAG) crystal has high mechanical strength, transparency, chemical stability, thermal conductivity, and can provide a good crystal-field environment to activated ions. In the present project, Ce3+-doped YAG-containing glass-ceramic will be investigated for its application in W-LEDs. In the present project, parent glasses based on the composition of Y2O3 –Al2O3 –SiO2 –CeO2 will be prepared by melt-quench method. After crystallization heat-treatment 1450℃/2-6h, glass-ceramics containing Ce3+-doped YAG crystalline particles embedded within silicate glass matrix will be formed by SEM/EDS. The YAG crystalline phase formed in the glass will be identified by XRD. The photoluminescence and CIE color coordinate locus of the Ce3+-doped glass-ceramics will be examined. With the more YAG crystalline formed (more heating temperature or time), the samples show more bright yellow and the yellow light strength more strong. Finally, the color coordinate of the LED composite containing a Ce3+-doped YAG glass-ceramic plate and a blue LED chip will be measured. These result to assess the feasibility for YAG glass-ceramics application in the W-LEDs.