title: UVC upconversion material under sunlight excitation: LiYF(4): Pr(3+).
abstract: UVC upconversion emission is observed in a LiYF4:Pr3+microcrystal under sunlight excitation. The dependence of UVC UC emission intensity on the excitation density of a 488 nm laser and sunlight is investigated. The obtained data indicates that two-photon processes play an important role in UVC UC emission. The UVC UC mechanisms of Pr3+under the excitation of a laser and sunlight are presented and discussed. The UVC emission under sunlight excitation has broad prospects for application.
authors.forename: Jianhong
authors.initials: J
authors.lastname: Wu
authors.forename: Haolin
authors.initials: H
authors.lastname: Zheng
authors.forename: Xinghua
authors.initials: X
authors.lastname: Liu
authors.forename: Boning
authors.initials: B
authors.lastname: Han
authors.forename: Jun
authors.initials: J
authors.lastname: Wei
authors.forename: Yanmin
authors.initials: Y
authors.lastname: Yang
mesh_terms: D005459:Fluorides / Q000737:chemistry*; D007834:Lasers; D018020:Lithium Compounds / Q000737:chemistry; D055620:Optical Phenomena; D011221:Praseodymium / Q000737:chemistry*; D013472:Sunlight; D014466:Ultraviolet Rays; D015019:Yttrium / Q000737:chemistry
chemical_list: D018020:Lithium Compounds; D015019:Yttrium; D011221:Praseodymium; D005459:Fluorides