An aerosol synthesized CeO2: Eu3+/Na+ red nanophosphor with enhanced photoluminescence

作者：Min Byeong Ho; Lee Jong Chan; Jung Kyeong Youl; Kim Dae Sung; Choi Byung Ki; Kang Wkang Jung

来源：RSC Advances, 2016, 6(84): 81203-81210.

DOI：10.1039/c6ra16551f

In this work, CeO2: Eu3+/Na+ nanoparticles with high photoluminescence were prepared via a conventional spray pyrolysis process using ethylene glycol (EG) as an organic additive. CeO2: Eu had intensive emission due to the D-5(0) -> F-7(1) (orange) or D-5(0) -> F-7(2) (red) transition of Eu3+. The R/O emission ratio showed a linear increment with the Eu concentration, which was attributed to the reduction in the local symmetry of Eu3+ -substituted sites. The optimal Eu concentration to achieve the highest emission intensity was 4 at%, and the luminescence quenching was revealed to occur through a dipole-dipole interaction. The use of EG as a chemical additive could prepare CeO2: Eu nanoparticles of smaller than 80 nm. Also, the emission intensity of nanoparticles was enhanced about 16.5 times higher via codoping Na+ with Eu3+ in the CeO2 matrix, which was attributed to the charge compensation as well as the increase of crystallite size. The use of EG and co-dopant Na+ was proved to be a simple and excellent way to synthesize highly luminescent nanoparticles via spray pyrolysis.

• 出版日期2016