Combustion synthesis of Ca 2 Si 5 N 8: Eu 2+ phosphors and their luminescent properties

Shyan-Lung Chung, Wei Chi Chou

研究成果: Article同行評審

23 引文 斯高帕斯(Scopus)


A combustion synthesis method has been developed for synthesis of Eu 2+-doped Ca2Si5N8 phosphor and its photoluminescence properties were investigated. Ca, Si, and Eu2O 3 powders were used as the Ca, Si, and Eu sources. NaN3 and NH4Cl were found necessary to be added for the formation of the product phase and addition of Si3N4 was found to enhance the product yield. These powders were mixed and pressed into a compact, which was then wrapped up with an igniting agent (Mg + Fe3O4). The reactant compact was ignited by electrical heating under a N2 pressure of 0.7 MPa. Effects of these experimental parameters on the product yield were investigated and a reaction mechanism was proposed. The synthesized Ca2Si5N8: Eu2+ phosphor absorbs light in the region of 300-520 nm and shows a broad band emission in the region of 500-670 nm due to the 4f65d1 → 4f7 transition of Eu2+. Eu2O3 was found partially unreacted and a certain amount of oxygen is believed to be incorporated into the lattice of the product phase. The peak emission intensity (~93% of a commercially available phosphor, YAG:Ce3+v) and the peak emission wavelength (571-581 nm) were found to be lower and shorter, respectively, than that reported in the literature. These are considered to be mainly due to oxygen incorporation, which not only reduces nephelauxetic effect and crystal field splitting but also causes a lowering of internal quantum efficiency.

頁(從 - 到)2086-2092
期刊Journal of the American Ceramic Society
出版狀態Published - 2013 七月 1

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 地質學
  • 地球化學與岩石學
  • 材料化學


深入研究「Combustion synthesis of Ca <sub>2</sub> Si <sub>5</sub> N <sub>8</sub>: Eu <sup>2+</sup> phosphors and their luminescent properties」主題。共同形成了獨特的指紋。