title: Ultraviolet and violet upconversion fluorescence of europium (III) doped in YF(3) nanocrystals.
abstract: Under 980 nm excitation, Eu(3+)/Tm(3+)/Yb(3+) tri-doped YF(3) nanocrystals emitted ultraviolet and visible fluorescence. Besides the upconversion emissions from Tm(3+) ions, not only were the unusual (5)D(2)-->(7)F(3), (5)D(3)-->(7)F(J) emissions of Eu(3+) observed, but also the ultraviolet upconversion luminescence of Eu(3+) from (5)H(3-7), (5)G(2-6), (5)L(6)-->(7)F(0) transitions were recorded. This unique optical property was attributed to the bridging function of Tm(3+) ions in populating high-energy states of Eu(3+) ions.
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Wang
authors.forename: Xiaojie
authors.initials: X
authors.lastname: Xue
authors.forename: Feng
authors.initials: F
authors.lastname: Shi
authors.forename: Dan
authors.initials: D
authors.lastname: Zhao
authors.forename: Daisheng
authors.initials: D
authors.lastname: Zhang
authors.forename: Kezhi
authors.initials: K
authors.lastname: Zheng
authors.forename: Guofeng
authors.initials: G
authors.lastname: Wang
authors.forename: Chunfeng
authors.initials: C
authors.lastname: He
authors.forename: Ryongjin
authors.initials: R
authors.lastname: Kim
authors.forename: Weiping
authors.initials: W
authors.lastname: Qin
mesh_terms: D003460:Crystallization; D004867:Equipment Design; D005063:Europium / Q000737:chemistry*; D007477:Ions; D007834:Lasers; D049449:Luminescence; D046529:Microscopy, Electron, Transmission / Q000379:methods; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D017785:Photons; D013055:Spectrophotometry, Infrared / Q000379:methods; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: D007477:Ions; D005063:Europium