title: Synthesis, optical properties, and energy transfer of Ce(3+)/Tb(3+) co-doped MyGdFx (M=Li, Na, K).
abstract: Through a solid-state reaction method, the Ce(3+)/Tb(3+) co-doped MyGdFx (M=Li, Na, K; x=3, 4, 6; y=0, 1, 3) system samples have been synthesized by controlling the annealing temperatures and the ratios of raw materials. The samples were characterized by X-ray diffraction (XRD) patterns, photoluminescence (PL) excitation and emission spectra as well as luminescent dynamic decay curves. The experimental results suggest that the LiF is more difficult to react with the prepared material compared that of NaF or KF under similar reaction conditions. The samples crystallized in different crystalline phases. The energy transfer from Ce(3+) to Tb(3+) or Ce(3+) to Gd(3+) to Tb(3+) has been observed in all the samples. The Ce(3+) and Tb(3+) present different optical properties for they are sensitive to the local environment. In addition, the deduced lifetime of Tb(3+)(5)D4→(7)F5 transition decreases in the same system samples with the annealing temperature increasing. The deduced lifetime of Tb(3+)(5)D4→(7)F5 also decreases with the increase of the KF concentration in the KF system samples.
authors: College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, China. Electronic address: caoyan_80@126.com.
authors: Chunyan
authors: C
authors: Cao
authors: College of Mechanical Manufacture and Automation, Jinggangshan University, Ji'an 343009, China.
authors: Zhiyang
authors: Z
authors: Luo
authors: College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, China.
authors: Siling
authors: S
authors: Guo
authors: College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, China.
authors: Renping
authors: R
authors: Cao
authors: Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea.
authors: Hyeon Mi
authors: HM
authors: Noh
authors: Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea. Electronic address: jhjeong@pknu.ac.kr.
authors: Jung Hyun
authors: JH
authors: Jeong
authors: School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China. Electronic address: anxie@xmut.edu.cn.
authors: An
authors: A
authors: Xie
mesh_terms: D002563:Cerium / Q000737:chemistry*; D003460:Crystallization; D004735:Energy Transfer; D005459:Fluorides / Q000138:chemical synthesis / Q000737:chemistry*; D005682:Gadolinium / Q000737:chemistry; D008094:Lithium / Q000737:chemistry; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D011188:Potassium / Q000737:chemistry; D012964:Sodium / Q000737:chemistry; D013725:Terbium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D049408:Luminescent Agents; D013725:Terbium; D002563:Cerium; D008094:Lithium; D012964:Sodium; D005682:Gadolinium; D005459:Fluorides; D011188:Potassium
keywords: Crystalline phase; Energy transfer; Optical properties; Synthesis