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发布时间：2019-03-11

论文类型：期刊论文

发表时间：2017-12-01

发表刊物：JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

收录刊物：Scopus、EI、SCIE

卷号：28

期号：23

页面范围：18015-18021

ISSN号：0957-4522

摘要：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.