Synthesis and Luminescence Characterization of New Thiosilicate, Oxysulfide and Phosphate Phosphors for LED Application

• Main Authors: Chang, Yi-Chi, 張益旗
• Other Authors: Chen, Teng-Ming
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/84070022650572336034

碩士 === 國立交通大學 === 應用化學系碩博士班 === 101 === White light-emitting diodes (LEDs) are considered to be the next generation of solid-state lighting systems because of their excellent properties, such as high efficiency, low power consumption, long life time, and environmental friendliness. We have screened and selected the phosphate, oxysulfide, and thiosilicates as host matrices, which were activated with Ce3+ or Eu2+ as activator, respectively. In this study, we have synthesized several new Ce3+ or Eu2+- activated phosphors with Ba2Mg(PO4)2, SrMg2(PO4)2, La10S14O, ZnY6Si2S14 and BaGa2SiS6 serving as hosts by using solid-state method. We have also reported the optimization of synthetic conditions for all phosphors and the analysis results using XRD. The phosphors were further characterized photoluminescence spectroscopy and thermal luminescence quenching measurements. Finally, we evaluate the potential applications of all phosphors by fabrication of white-light LEDs using BaGa2SiS6:Eu2+ and commodity phosphors in combination with a near-UV LED chip.