UVC upconversion material under sunlight excitation: LiYF(4): Pr(3+).

Authors :: Wu J
Zheng H
Liu X
Han B
Wei J
Yang Y
Source :: Optics letters [Opt Lett] 2016 Feb 15; Vol. 41 (4), pp. 792-5.
Publication Year :: 2016
Abstract: UVC upconversion emission is observed in a LiYF <subscript>4</subscript> :Pr <superscript>3+</superscript> 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 Pr <superscript>3+</superscript> under the excitation of a laser and sunlight are presented and discussed. The UVC emission under sunlight excitation has broad prospects for application.