Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2017-12-01

Journal: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

Included Journals: Scopus、EI、SCIE

Volume: 28

Issue: 23

Page Number: 18015-18021

ISSN: 0957-4522

Abstract: Lu2O3 nanospheres with various concentrations of Eu3+ are synthesized via urea homogeneous precipitation method. The influence of the Eu3+ doping concentration on the structural, optical properties was systemically studied. The emission spectra of Lu2O3: Eu3+ nanospheres consist of a group of sharp lines from blue to red light originating from D-5(1, 0) -> F-7(J) transitions of Eu3+. The photoluminescence intensities and decay times varies with the increasing Eu3+ concentrations, which are attributed to the energy transfer among the Eu3+ ions. The fluorescent quenching is mainly due to the D-D interaction by using the Van Uitert's model and Dexter's model. The Lu2O3: Eu3+ phosphor exhibits good thermal characteristics. The emission intensity of Lu2O3: Eu3+ phosphor only decreases 8% with the increasing of temperature from 303 to 403 K. The temperature quenching behavior of Lu2O3: Eu3+ is attributed to the crossover process via the charge transfer band with high activation energy of 0.264 eV. Moreover, the Judd-Ofelt parameters Omega(lambda) (lambda = 2, 4, 6) of Eu3+ in Lu2O3 phosphor were also calculated.