Luminescence of Tb-doped Ca3Y2(Si3O9)(2) oxide upon UV and VUV synchrotron radiation excitation

作者：Dobrowolska Anna; Zych Eugeniusz^*

来源：Journal of Solid State Chemistry, 2011, 184(7): 1707-1714.

DOI：10.1016/j.jssc.2011.05.014

• Calcium yttrium silicate
• Tb3+ luminescence
• VUV excitation
• Exciton

Powders of calcium yttrium silicate, Ca3Y2(Si3O9)(2), containing 0.1-3% Tb3+ were prepared using a sol-gel method and characterized with XRD, IR, UV-vis and UV-VUV spectroscopies at room temperature and 10K. Structural analysis revealed pure monoclinic phase of Ca3Y2(Si3O9)(2) after heat-treatment at 1000 degrees C. Infrared spectroscopy showed that between 800 and 900 degrees C a short-range structural organization of the components proceeded, yet without crystallization. A strong emission of Tb3+ had been observed both in the green part of the spectrum due to the D-5(4) -> F-7(J) transitions and in the blue-violet region owing to the D-5(3) -> F-7(J) radiative relaxation. The color of the light could be tuned from yellowish-green to bluish-white both by means of the dopant content and the temperature of synthesis. Efficient luminescence of Tb3+-doped Ca3Y2(Si3O9)(2) phosphors could also be obtained upon stimulation with vacuum ultraviolet synchrotron radiation demonstrating that an energy transfer from the host to the Tb3+ ions takes place.

• 出版日期2011-7