Preparation of novel phosphor using intercalation of tobermorite

作者：Kojima Yoshiyuki^*; Kamei Shinnosuke; Toyama Takeshi; Nishimiya Nobuyuki

来源：Journal of Luminescence, 2009, 129(7): 751-754.

DOI：10.1016/j.jlumin.2009.02.008

• Phosphor
• Tobermorite
• Intercalation
• Concentration quenching
• Red-emitting
• Amorphous

The emission intensity of phosphors is often subject to concentration quenching after doping of the activator in the host crystal rises above a certain limit. This study describes the preparation of novel phosphors based on tobermorite that do not exhibit concentration quenching. In the preparation of phosphors, Eu(3+) ions are exchanged with intercalated Ca(2+) ions within the tobermorite by dipping in EuCl(3) solution. The emission intensity of the Eu(3+) doped tobermorite increased with increasing Eu/Ca atomic ratio and attained a maximum value of 8.6% for a Eu/Ca atomic ratio of 0.22. Heating of the phosphor at 800 degrees C resulted in a three-fold improvement in emission intensity.

• 出版日期2009-7