title: Spectral properties and energy transfer in PbWO(4) co-doped with Cr(3+) and F(-).
abstract: A Cr(3+), F(-)-co-doped PbWO(4) crystal was grown by the Czochralski method and its spectroscopic properties were investigated. In addition to the intrinsic luminescence of PbWO(4), the sample showed [Formula: see text] radiation of Cr(3+) excited by x-radiation or UV-vis light. This indicated that the Cr(3+) is submitted to a strong crystal field and a doping mechanism is hereby proposed that Cr(3+) replaces W(6+) with the cooperation of F(-). The reabsorption and resonant energy transfer mechanisms from host to Cr(3+) were studied. As a result, the PbWO(4) intrinsic emission was intensively suppressed and the [Formula: see text] luminescence increased when excited by x-radiation compared to excitation by UV-vis light, and the decay constants of PbWO(4) host scintillation reduce. The significant [Formula: see text] luminescence of this material may be of interest for further application.
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China. College of Materials Science and Engineering, Hunan University, Changsha 410082, People's Republic of China.
authors.forename: Weifeng
authors.initials: W
authors.lastname: Li
authors.forename: Xiqi
authors.initials: X
authors.lastname: Feng
authors.forename: Chengjun
authors.initials: C
authors.lastname: Duan
authors.forename: Jingtai
authors.initials: J
authors.lastname: Zhao
authors.forename: Dunhua
authors.initials: D
authors.lastname: Cao
authors.forename: Mu
authors.initials: M
authors.lastname: Gu