Size-dependent luminescence in Y2Si2O7 nanoparticles doped with Ce3+ ions

作者：Marciniak L; Hreniak D^*; Dobrowolska A; Zych E

来源：Applied Physics A-Materials Science & Processing, 2010, 99(4): 871-877.

DOI：10.1007/s00339-010-5622-3

Powders and thin films of nanocrystalline yttrium disilicate (Y2Si2O7) doped with Ce3+ have been prepared by a sol-gel method. Structure and morphology of the synthesised samples have been determined and spectroscopic properties compared. The triclinic alpha-Y2Si2O7 form (space group P 1-) for the powders annealed between 1000A degrees C and 1200A degrees C has been found. A total conversion into a thortveitite-type monoclinic beta-Y2Si2O7 polymorph after annealing of powder samples at 1400A degrees C (space group C2/m) has been observed. In the case of films even at 1300A degrees C the basically pure triclinic alpha-Y2Si2O7 phase was observed with luminescent spectroscopy. The influence of grain size, controlled by thermal treatment, on the structure and luminescence properties of the fabricated materials are presented and discussed.

• 出版日期2010-6