title: Luminescence and thermal-quenching properties of Dy³⁺-doped Ba₂CaWO₆ phosphors.
abstract: A series of new double perovskite tungstate Ba2CaWO6:xDy(3+) (0.01⩽x⩽0.15) phosphors were synthesized via solid state reaction process. XRD analysis confirmed the phase formation of Ba2CaWO6:Dy(3+) materials. The photoluminescence excitation and emission spectra, concentration effect, thermal-quenching, and decay property were investigated. The phosphor could be excited by the UV light region from 250 to 400 nm, and it exhibits blue (493 nm) and yellow (584 nm) emission corresponding to (4)F(9/2)-(6)H(15/2) transitions and (4)F9/2-(6)H13/2 transitions, respectively. The optimum dopant concentration of Dy(3+) ions in Ba2CaWO6:xDy(3+) is around 5 mol% and the critical transfer distance of Dy(3+) is calculated as 14 Å. The thermal-quenching temperature is 436 K for Ba2CaWO6:0.05Dy(3+). The fluorescence lifetime is also determined in Ba2CaWO6:0.05Dy(3+).
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Department of Physics, Changwon National University, Changwon 641-773, Republic of Korea.
authors.forename: Ruijin
authors.initials: R
authors.lastname: Yu
authors.affiliation: Department of Chemistry, Changwon National University, Changwon 641-773, Republic of Korea.
authors.forename: Dong Soo
authors.initials: DS
authors.lastname: Shin
authors.affiliation: Department of Physics, Changwon National University, Changwon 641-773, Republic of Korea. Electronic address: kwjang@changwon.ac.kr.
authors.forename: Kiwan
authors.initials: K
authors.lastname: Jang
authors.affiliation: Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea.
authors.forename: Yue
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea.
authors.forename: Hyeon Mi
authors.initials: HM
authors.lastname: Noh
authors.affiliation: Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea.
authors.forename: Byung Kee
authors.initials: BK
authors.lastname: Moon
authors.affiliation: Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea.
authors.forename: Byung Chun
authors.initials: BC
authors.lastname: Choi
authors.affiliation: Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea. Electronic address: jhjeong@pknu.ac.kr.
authors.forename: Jung Hyun
authors.initials: JH
authors.lastname: Jeong
authors.affiliation: Department of Electronic Material Engineering, Silla University, Busan 617-736, Republic of Korea.
authors.forename: Soung Soo
authors.initials: SS
authors.lastname: Yi
mesh_terms: D001464:Barium / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry*; D004419:Dysprosium / Q000737:chemistry*; D049449:Luminescence; D008855:Microscopy, Electron, Scanning; D017905:Phosphites / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013696:Temperature; D017973:Tungsten Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D017905:Phosphites; D017973:Tungsten Compounds; D004419:Dysprosium; D001464:Barium; C045951:tungstate; D002118:Calcium
keywords: Ba(2)CaWO(6):Dy(3+); Luminescence; Phosphor; Tungstate